Tobia提出的问题 -server

Tobia

Asked: 2025-03-16 14:32:23 +0800 CST

拥挤会影响 wifi 性能吗？

5

我必须管理一个事件的访问控制，它与连接到现有 Wi-Fi 基础设施的几个 pda 设备一起工作。

在活动前的测试中，连接似乎很好，所有 pda 都有良好的信号，并且可以协同工作并具有良好的响应时间。

正如您想象的那样，活动期间的事情发生了一些不同。

我们经历过网络层故障、Wi-Fi 信号中断（设备断开连接几秒钟）、tcp 连接超时、信号较弱以及一些其他第 7 层相关问题，例如 DNS 响应失败。

设备和AP的数量和位置均未改变。

所以我想知道，大量未连接到同一 Wifi的其他 Wifi 设备是否是导致这种降级的原因。我的意思是，所有智能手机进行的 Wifi 研究是否可能导致 AP 降级？

有什么解决办法吗？例如使用隐藏的 SSID？

Tobia

Asked: 2024-12-24 23:04:50 +0800 CST

为什么 nginx 不遵守客户端的 Cache-Control 请求？

5

我的 nginx 平衡器中有一个缓存指令，没有任何特殊设置。
我发现当我在浏览器中按 CTRL-F5 时，所有资源都使用Cache-Control:no-cache标头进行请求，但 nginx 仍然使用缓存内容进行回复。

nginx 的设计是否只尊重后端服务器缓存标头而不尊重客户端缓存标头？

这是 nginx 缓存配置的相关部分：

  proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=mycache:100m max_size=500m inactive=60m use_temp_path=off;
  proxy_cache_key $host$request_uri;

  proxy_cache mycache;
  add_header X-Cache-Status $upstream_cache_status;

即使客户端的 Cache-Control 为 no-cache，X-Cache-Status 值也是 HIT

这是完整配置：

# configuration file /etc/nginx/nginx.conf:
user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
    worker_connections 768;
    # multi_accept on;
}

http {

    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    types_hash_max_size 2048;
    server_tokens off;
    client_max_body_size 100M;

    # server_names_hash_bucket_size 64;
    # server_name_in_redirect off;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    ##
    # SSL Settings
    ##

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE
    ssl_prefer_server_ciphers on;

    ##
    # Logging Settings
    ##

    log_format cache_st '$remote_addr - $upstream_cache_status [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent"';
    access_log /var/log/nginx/access.log cache_st;
    error_log /var/log/nginx/error.log;

    ##
    # Gzip Settings
    ##

    gzip on;

    # gzip_vary on;
    # gzip_proxied any;
    # gzip_comp_level 6;
    # gzip_buffers 16 8k;
    # gzip_http_version 1.1;
    # gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    #
    ## Cache
    #
    
    proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=mycache:100m max_size=500m inactive=60m use_temp_path=off;


    ##
    # Virtual Host Configs
    ##

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}


#mail {
#   # See sample authentication script at:
#   # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
#
#   # auth_http localhost/auth.php;
#   # pop3_capabilities "TOP" "USER";
#   # imap_capabilities "IMAP4rev1" "UIDPLUS";
#
#   server {
#       listen     localhost:110;
#       protocol   pop3;
#       proxy      on;
#   }
#
#   server {
#       listen     localhost:143;
#       protocol   imap;
#       proxy      on;
#   }
#}

# configuration file /etc/nginx/modules-enabled/50-mod-http-auth-pam.conf:
load_module modules/ngx_http_auth_pam_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-cache-purge.conf:
load_module modules/ngx_http_cache_purge_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-dav-ext.conf:
load_module modules/ngx_http_dav_ext_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-echo.conf:
load_module modules/ngx_http_echo_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-fancyindex.conf:
load_module modules/ngx_http_fancyindex_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-geoip.conf:
load_module modules/ngx_http_geoip_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-geoip2.conf:
load_module modules/ngx_http_geoip2_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-headers-more-filter.conf:
load_module modules/ngx_http_headers_more_filter_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-image-filter.conf:
load_module modules/ngx_http_image_filter_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-perl.conf:
load_module modules/ngx_http_perl_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-subs-filter.conf:
load_module modules/ngx_http_subs_filter_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-uploadprogress.conf:
load_module modules/ngx_http_uploadprogress_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-upstream-fair.conf:
load_module modules/ngx_http_upstream_fair_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-http-xslt-filter.conf:
load_module modules/ngx_http_xslt_filter_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-mail.conf:
load_module modules/ngx_mail_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-nchan.conf:
load_module modules/ngx_nchan_module.so;

# configuration file /etc/nginx/modules-enabled/50-mod-stream.conf:
load_module modules/ngx_stream_module.so;

# configuration file /etc/nginx/modules-enabled/70-mod-stream-geoip.conf:
load_module modules/ngx_stream_geoip_module.so;

# configuration file /etc/nginx/modules-enabled/70-mod-stream-geoip2.conf:
load_module modules/ngx_stream_geoip2_module.so;

# configuration file /etc/nginx/mime.types:

types {
    text/html                             html htm shtml;
    text/css                              css;
    text/xml                              xml;
    image/gif                             gif;
    image/jpeg                            jpeg jpg;
    application/javascript                js;
    application/atom+xml                  atom;
    application/rss+xml                   rss;

    text/mathml                           mml;
    text/plain                            txt;
    text/vnd.sun.j2me.app-descriptor      jad;
    text/vnd.wap.wml                      wml;
    text/x-component                      htc;

    image/png                             png;
    image/tiff                            tif tiff;
    image/vnd.wap.wbmp                    wbmp;
    image/x-icon                          ico;
    image/x-jng                           jng;
    image/x-ms-bmp                        bmp;
    image/svg+xml                         svg svgz;
    image/webp                            webp;

    application/font-woff                 woff;
    application/java-archive              jar war ear;
    application/json                      json;
    application/mac-binhex40              hqx;
    application/msword                    doc;
    application/pdf                       pdf;
    application/postscript                ps eps ai;
    application/rtf                       rtf;
    application/vnd.apple.mpegurl         m3u8;
    application/vnd.ms-excel              xls;
    application/vnd.ms-fontobject         eot;
    application/vnd.ms-powerpoint         ppt;
    application/vnd.wap.wmlc              wmlc;
    application/vnd.google-earth.kml+xml  kml;
    application/vnd.google-earth.kmz      kmz;
    application/x-7z-compressed           7z;
    application/x-cocoa                   cco;
    application/x-java-archive-diff       jardiff;
    application/x-java-jnlp-file          jnlp;
    application/x-makeself                run;
    application/x-perl                    pl pm;
    application/x-pilot                   prc pdb;
    application/x-rar-compressed          rar;
    application/x-redhat-package-manager  rpm;
    application/x-sea                     sea;
    application/x-shockwave-flash         swf;
    application/x-stuffit                 sit;
    application/x-tcl                     tcl tk;
    application/x-x509-ca-cert            der pem crt;
    application/x-xpinstall               xpi;
    application/xhtml+xml                 xhtml;
    application/xspf+xml                  xspf;
    application/zip                       zip;

    application/octet-stream              bin exe dll;
    application/octet-stream              deb;
    application/octet-stream              dmg;
    application/octet-stream              iso img;
    application/octet-stream              msi msp msm;

    application/vnd.openxmlformats-officedocument.wordprocessingml.document    docx;
    application/vnd.openxmlformats-officedocument.spreadsheetml.sheet          xlsx;
    application/vnd.openxmlformats-officedocument.presentationml.presentation  pptx;

    audio/midi                            mid midi kar;
    audio/mpeg                            mp3;
    audio/ogg                             ogg;
    audio/x-m4a                           m4a;
    audio/x-realaudio                     ra;

    video/3gpp                            3gpp 3gp;
    video/mp2t                            ts;
    video/mp4                             mp4;
    video/mpeg                            mpeg mpg;
    video/quicktime                       mov;
    video/webm                            webm;
    video/x-flv                           flv;
    video/x-m4v                           m4v;
    video/x-mng                           mng;
    video/x-ms-asf                        asx asf;
    video/x-ms-wmv                        wmv;
    video/x-msvideo                       avi;
}

# configuration file /etc/nginx/sites-enabled/010-mysiteb:
# HTTP

server {
        server_name mysite2 mysiteb mysite3 mysiteb;
    listen 80;  
    include commons/http-location.inc;
}

# BALANCED HAPROXY2 - TCP 81

server {
        server_name mysiteb;
    listen 443 ssl;
    ssl_certificate /etc/letsencrypt/live/mysiteb/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/mysiteb/privkey.pem;
    include commons/ha-location-2.inc;
}

# BALANCED HAPROXY WEB - TCP 82

server {
        server_name mysite3 mysiteb;
    listen 443 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite3/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite3/privkey.pem;
        include commons/ha-location-web.inc;
}

server {
        server_name mysite2;
        listen 443 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite2/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite2/privkey.pem;
        include commons/ha-location-web.inc;
}

# configuration file /etc/nginx/commons/http-location.inc:
        location /.well-known {
                alias /var/www/html/.well-known;
        }
        location / {
                return 301 https://$host$request_uri;
        }

# configuration file /etc/nginx/commons/ha-location-2.inc:
        location / {
                proxy_pass http://127.0.0.1:81;
                proxy_set_header Host $host;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_set_header X-Forwarded-Host $http_host;
                proxy_set_header X-Forwarded-SSL on;
        proxy_set_header X-Forwarded-Proto https;
                error_page 502 /502error.html;
        }
        location /ws {
                proxy_pass http://127.0.0.1:81;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "Upgrade";
                proxy_set_header Host $host;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_set_header X-Forwarded-Host $http_host;
                proxy_set_header X-Forwarded-SSL on;
        proxy_set_header X-Forwarded-Proto https;
                proxy_read_timeout 120;
        }
        location = /502error.html {
                root   /usr/share/nginx/html;
                internal;
        }

# configuration file /etc/nginx/commons/ha-location-web.inc:
        location / {
                proxy_pass http://127.0.0.1:82;
                proxy_set_header Host $host;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_set_header X-Forwarded-Host $http_host;
                proxy_set_header X-Forwarded-SSL on;
        proxy_set_header X-Forwarded-Proto https;
                error_page 502 /502error.html;
        proxy_cache mycache;
        add_header X-Cache-Status $upstream_cache_status;
        }
        location = /502error.html {
                root   /usr/share/nginx/html;
                internal;
        }

# configuration file /etc/nginx/commons/srvap1-location.inc:
        location / {
                proxy_pass http://srvap1/;
                proxy_set_header Host $host;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_set_header X-Forwarded-Host $http_host;
                proxy_set_header X-Forwarded-SSL on;
        proxy_set_header X-Forwarded-Proto https;
                error_page 502 /502error.html;
        }
        location /ws {
                proxy_pass http://srvap1;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "Upgrade";
                proxy_set_header Host $host;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_set_header X-Forwarded-Host $http_host;
                proxy_set_header X-Forwarded-SSL on;
        proxy_set_header X-Forwarded-Proto https;
                proxy_read_timeout 120;
        }
        location = /502error.html {
                root   /usr/share/nginx/html;
                internal;
        }

# configuration file /etc/nginx/commons/srvap2-location.inc:
        location / {
                proxy_pass http://srvap2/;
                proxy_set_header Host $host;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_set_header X-Forwarded-Host $http_host;
                proxy_set_header X-Forwarded-SSL on;
        proxy_set_header X-Forwarded-Proto https;
                error_page 502 /502error.html;
        }
        location /ws {
                proxy_pass http://srvap2;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "Upgrade";
                proxy_set_header Host $host;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_set_header X-Forwarded-Host $http_host;
                proxy_set_header X-Forwarded-SSL on;
        proxy_set_header X-Forwarded-Proto https;
                proxy_read_timeout 120;
        }
        location = /502error.html {
                root   /usr/share/nginx/html;
                internal;
        }

# configuration file /etc/nginx/sites-enabled/030-mysitea:
# HTTP

server {
        server_name mysite1 mysite4 mysite5;
    listen 80;  
    include commons/http-location.inc;
}

# BALANCED HAPROXY - TCP 81

server {
        server_name mysite4;
    listen 443 ssl;
    ssl_certificate /etc/letsencrypt/live/mysite4/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/mysite4/privkey.pem;
    include commons/ha-location-2.inc;
}

server {
        server_name mysite5 mysitea;
    listen 443 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite5/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite5/privkey.pem;
        include commons/ha-location-web.inc;
}

server {
        server_name mysite1;
        listen 443 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite1/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite1/privkey.pem;
        include commons/ha-location-web.inc;
}

# AP1 - TCP 10001

server {
        server_name mysite4;
        listen 10001 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite4/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite4/privkey.pem;
    include commons/srvap1-location.inc;
}

server {
        server_name mysite5 mysitea;
        listen 10001 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite5/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite5/privkey.pem;
        include commons/srvap1-location.inc;
}

server {
        server_name mysite1;
        listen 10001 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite1/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite1/privkey.pem;
        include commons/srvap1-location.inc;
}

# AP2 - TCP 10002

server {
        server_name mysite4;
        listen 10002 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite4/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite4/privkey.pem;
        include commons/srvap2-location.inc;
}

server {
        server_name mysite5 mysitea;
        listen 10002 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite5/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite5/privkey.pem;
        include commons/srvap2-location.inc;
}

server {
        server_name mysite1;
        listen 10002 ssl;
        ssl_certificate /etc/letsencrypt/live/mysite1/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mysite1/privkey.pem;
        include commons/srvap2-location.inc;
}


# configuration file /etc/nginx/sites-enabled/default:
##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# https://www.nginx.com/resources/wiki/start/
# https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
# https://wiki.debian.org/Nginx/DirectoryStructure
#
# In most cases, administrators will remove this file from sites-enabled/ and
# leave it as reference inside of sites-available where it will continue to be
# updated by the nginx packaging team.
#
# This file will automatically load configuration files provided by other
# applications, such as Drupal or Wordpress. These applications will be made
# available underneath a path with that package name, such as /drupal8.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

# Default server configuration
#
server {
    listen 80 default_server;
    listen [::]:80 default_server;

    # SSL configuration
    #
    # listen 443 ssl default_server;
    # listen [::]:443 ssl default_server;
    #
    # Note: You should disable gzip for SSL traffic.
    # See: https://bugs.debian.org/773332
    #
    # Read up on ssl_ciphers to ensure a secure configuration.
    # See: https://bugs.debian.org/765782
    #
    # Self signed certs generated by the ssl-cert package
    # Don't use them in a production server!
    #
    # include snippets/snakeoil.conf;

    root /var/www/html;

    # Add index.php to the list if you are using PHP
    index index.html index.htm index.nginx-debian.html;

    server_name _;

    location / {
        # First attempt to serve request as file, then
        # as directory, then fall back to displaying a 404.
        try_files $uri $uri/ =404;
    }

}
server {

    listen 127.0.0.1:1935;

    root /var/www/html;

    location / {
        stub_status;
    }

}

Tobia

Asked: 2024-05-15 04:24:35 +0800 CST

缓存对于备份 NAS 存储有多重要？

5

我正在开发一个新的 nas 来存储一些虚拟机的 veeam 备份。

我将使用一些磁盘，我的疑问是关于可选的 SSD 缓存磁盘。

我想知道缓存层是否重要，通常我知道几个缓存磁盘不是一个坏主意，但在这种情况下我想知道是否推荐它或不是很有用。

据我所知，缓存用于吸收少量小操作或同一扇区中的重复操作。在虚拟机备份场景中，我预计大量写入操作和缓存层将很快被填满并变得几乎无用。

我是对还是错？

Tobia

Asked: 2022-11-09 09:16:13 +0800 CST

本地反垃圾邮件和 MS 365 混合部署

5

我正在配置MS 365 混合部署，MX 将保留在 Exchange 本地服务器上。

我有一个我不想删除的本地反垃圾邮件 (LibraEsva)。

这是实际配置：

按照 MS 指南，Exchange On Premise 和 Cloud 之间的连接必须是直接的，没有任何过滤器。

如您所见，有一个从公共互联网到 MX 接口的 SMTP 25 已被反垃圾邮件过滤。此外，Exchange On Premise 和 Cloude 之间还有另一个 SMTP 25 连接，用于本地和云邮箱之间的内部路由。

我做了2个NAT

从具有端口 SMTP-25 的任何转发到反垃圾邮件
从带有端口 SMTP-25 的 MS365 ips 转发到 Exchange

这有效，公共电子邮件被过滤，Exchange 服务器之间的电子邮件未被过滤......

但

由 MS365 主机名创建的 NAT 正在接收来自 MS 365 的所有公共电子邮件，而不仅仅是内部电子邮件，如果 365 的任何用户向我发送电子邮件，它不再被过滤。

我该如何解决这个脑筋急转弯？我认为应该有一个解决方案。

Tobia

Asked: 2021-03-14 01:29:15 +0800 CST

Apache 将 HTTP 重定向到 HTTPS 重定向还是重写？

0

我找到了两种使用 apache 将 http 重定向到 https 的方法。使用重定向

Redirect / https://mydomain/

或重写

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^/?(.*) https://mydomain/$1 [R,L]

有什么区别？

Tobia

Asked: 2021-02-19 01:45:52 +0800 CST

是否可以将外部 Pop3 邮箱下载到 Exchange 2013 邮箱？

0

有一次，Exchange 允许通过“Microsoft Connector for POP3 Mailboxes”将外部邮箱下载到本地邮箱。然后我可以将我的外部/流行邮件阅读到本地交换邮箱。2013有可能吗？我再也找不到连接器了。

Tobia

Asked: 2020-07-04 02:37:20 +0800 CST

Dns 传播部分完成

0

几周前，我为三级域启动了 powerdns 权威服务器。2 周后，我仍然有一些公共 dns 没有解析我的记录，例如 google (8.8.8.8) 正在解析，但 opendns (208.67.222.220) 没有解析。我已经在线尝试了一些 DNS 检查工具，我可以说只有 50% 的公共 dns 可以与我的记录一起使用。

我怎么能理解为什么？它可以连接到 DNSSEC（我没有启用它）吗？

Tobia

Asked: 2019-01-23 23:57:17 +0800 CST

Apache 配置：如何将非主机名请求限制到某些页面？

1

我的 Apache 服务器有一个虚拟主机配置：

<VirtualHost *:80>
    DocumentRoot "/app/www"
    ServerName myhostname
    <Directory "/app/www">
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

我想只允许访问myhostname作为主机名的请求。但我想拒绝主机名或服务器 IP 发出的所有其他请求：

http://myhostiname/ ALLOW
http://1.2.3.4/ (this is one of the server ip addresses) DENY

我的虚拟主机配置按预期工作。

现在我必须编辑配置以让用户通过 ip 访问一个特定路径，因为客户端无法解析本地主机名。

这是一个例子：

http://myhostiname ALLOW
http://1.2.3.4/ DENY
http://1.2.3.4/any/path DENY
http://1.2.3.4/allowed/path ALLOW
http://1.2.3.4/allowed/path/subpath ALLOW

我在新的虚拟主机中尝试了该<Location>元素：

<VirtualHost 0.0.0.0:80>
    DocumentRoot "/app/www"
    <Directory "/app/www">
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted
    </Directory>
    <Location "/">
      AllowOverride None
      Order Deny,Allow
      Deny from all
    </Location>
    <Location "^/allowed">
      Allow from all
    </Location> 
</VirtualHost>

但这拒绝了除了主机名请求之外的所有内容。我错过了什么？

Tobia

Asked: 2018-04-24 00:56:59 +0800 CST

如何使用 activesync 配置 Exchange 2013 共享邮箱？

0

我想使用 ActiveSync 协议而不是 IMAP将个人邮箱和共享邮箱 Exchange 2013 添加到 Android 设备。有可能吗？如何使用个人使用来验证共享邮箱？

我在某处找到了这些信息：

账户类型：交易所
用户：[email protected]/[email protected]
密码：我的个人密码
域名：mydomain.com

但对我不起作用。

Tobia

Asked: 2018-04-20 05:59:16 +0800 CST

由于固件不同，IBM SAN 上的驱动程序不兼容。我可以刷吗？

2

我必须在我的 IBM DS3512 SAN 中更换驱动器，我是按型号（希捷型号）而不是按 IBM FRU 代码购买的。我试图放置驱动器，但失败并出现错误“驱动器不兼容”。我看到其他驱动器的型号确实相同，但固件版本和制造商名称不同。

可能我必须归还驱动器并寻找 FRU 部分，但首先我想知道是否有任何方法可以解决这个问题，也许是在驱动器中刷新 IBM 固件。

此 SAN 不在生产环境中，仅用于测试

Tobia

Asked: 2018-02-28 03:08:39 +0800 CST

如何将多个绑定端口添加到 Pure-Ftpd

0

我可以在 Ubuntu 机器上向 PureFtpD 添加多个绑定端口吗？我可以更改绑定端口，编辑 /etc/pure-ftpd/Bind 文件。但我不明白如何设置额外的端口。我试图在 Bind 文件中添加一个新行，但它不起作用。

Tobia

Asked: 2017-12-13 01:41:52 +0800 CST

Microsoft Sql Server 2014 是否已通过 Windows Server 2016 认证

1

我想更新安装 Microsoft Sql Server 2014 的机器的 so 版本，这是否经过 Windows Server 2016 认证？我不希望 MS 协助出现问题...

Tobia

Asked: 2017-10-11 23:28:37 +0800 CST

让我们加密tomcat8 ubuntu服务器的证书权限

1

我正在尝试为我的 ubuntu 服务器 VPS 的 Apache HTTPD 和 TOMCAT 服务使用 let's encrypt 证书。

我发现在哪里有letsencrypt存储的证书来查看apache配置，它是由certboot脚本编写的，Apache可以很好地使用这个证书。

我对 tomcat server.xml 配置使用相同的链接，但在其日志中出现权限被拒绝错误：

SEVERE: Failed to initialize end point associated with ProtocolHandler ["http-apr-8443"]
java.lang.Exception: Unable to load certificate key /etc/letsencrypt/live/mysite.org/privkey.pem (error:0200100D:system library:fopen:Permission denied)
        at org.apache.tomcat.jni.SSLContext.setCertificate(Native Method)
        at org.apache.tomcat.util.net.AprEndpoint.bind(AprEndpoint.java:657)
        at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:742)
        at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:458)
        at org.apache.catalina.connector.Connector.initInternal(Connector.java:960)
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
        at org.apache.catalina.core.StandardService.initInternal(StandardService.java:568)
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
        at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:851)
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:580)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:603)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:310)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:484)

Oct 11, 2017 9:40:07 AM org.apache.catalina.core.StandardService initInternal
SEVERE: Failed to initialize connector [Connector[HTTP/1.1-8443]]
org.apache.catalina.LifecycleException: Failed to initialize component [Connector[HTTP/1.1-8443]]
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)
        at org.apache.catalina.core.StandardService.initInternal(StandardService.java:568)
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
        at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:851)
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:580)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:603)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:310)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:484)
Caused by: org.apache.catalina.LifecycleException: Protocol handler initialization failed
        at org.apache.catalina.connector.Connector.initInternal(Connector.java:964)
        at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
        ... 12 more
Caused by: java.lang.Exception: Unable to load certificate key /etc/letsencrypt/live/mysite.org/privkey.pem (error:0200100D:system library:fopen:Permission denied)
        at org.apache.tomcat.jni.SSLContext.setCertificate(Native Method)
        at org.apache.tomcat.util.net.AprEndpoint.bind(AprEndpoint.java:657)
        at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:742)
        at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:458)
        at org.apache.catalina.connector.Connector.initInternal(Connector.java:960)
        ... 13 more

Oct 11, 2017 9:40:07 AM org.apache.catalina.startup.Catalina load

调查许可我发现了这个：

root@myvps:~# ls -la /etc/letsencrypt/live/mysite.org/
total 12
drwxr-xr-x 2 root root 4096 Sep 20 06:30 .
drwx------ 4 root root 4096 May 23 07:27 ..
lrwxrwxrwx 1 root root   39 Sep 20 06:30 cert.pem -> ../../archive/mysite.org/cert3.pem
lrwxrwxrwx 1 root root   40 Sep 20 06:30 chain.pem -> ../../archive/mysite.org/chain3.pem
lrwxrwxrwx 1 root root   44 Sep 20 06:30 fullchain.pem -> ../../archive/mysite.org/fullchain3.pem
lrwxrwxrwx 1 root root   42 Sep 20 06:30 privkey.pem -> ../../archive/mysite.org/privkey3.pem
-rw-r--r-- 1 root root  543 May 23 07:27 README
root@myvps:~# ls -la /etc/letsencrypt/archive/mysite.org/
total 56
drwxr-xr-x 2 root root 4096 Sep 20 06:30 .
drwx------ 4 root root 4096 May 23 07:27 ..
-rw-r--r-- 1 root root 1818 May 23 07:27 cert1.pem
-rw-r--r-- 1 root root 1814 Jul 22 06:30 cert2.pem
-rw-r--r-- 1 root root 1814 Sep 20 06:30 cert3.pem
-rw-r--r-- 1 root root 1647 May 23 07:27 chain1.pem
-rw-r--r-- 1 root root 1647 Jul 22 06:30 chain2.pem
-rw-r--r-- 1 root root 1647 Sep 20 06:30 chain3.pem
-rw-r--r-- 1 root root 3465 May 23 07:27 fullchain1.pem
-rw-r--r-- 1 root root 3461 Jul 22 06:30 fullchain2.pem
-rw-r--r-- 1 root root 3461 Sep 20 06:30 fullchain3.pem
-rw-r--r-- 1 root root 1704 May 23 07:27 privkey1.pem
-rw-r--r-- 1 root root 1704 Jul 22 06:30 privkey2.pem
-rw-r--r-- 1 root root 1704 Sep 20 06:30 privkey3.pem

据我所知，这个对 ls 命令的回答表明每个人都有符号链接和真实文件的 READ 权限。我对吗？那么，如果我将其证书指向，为什么 tomcat 会抱怨权限/etc/letsencrypt/live/mysite.org/cert.pem？

Tobia

Asked: 2017-10-08 02:23:57 +0800 CST

如何在 Ubuntu 中使用证书/密钥文件在 Tomcat8 上启用 SSL

1

如何使用一对 crt/key 文件为 Tomcat 启用 SSL？

我试过这个：

我在 server.xml 配置中启用了 APR 连接器：

<Connector port="443" maxHttpHeaderSize="8192"
                 maxThreads="150"
                 enableLookups="false" disableUploadTimeout="true"
                 acceptCount="100" scheme="https" secure="true"
                 SSLEnabled="true"
                 SSLCertificateFile="my.crt"
                 SSLCertificateKeyFile="my.key" />

我不得不使用 APR 而不是 Http11NioProtocol，因为 crt 和密钥文件是由外部进程自动更新/更新的。似乎 Http11NioProtocol 只能使用密钥库。

然后我尝试安装 APR：

sudo apt-get install libapr1 libapr1-dev

我重新加载了 Tomcat，但没有找到 APR：

org.apache.catalina.LifecycleException: The configured protocol [org.apache.coyote.http11.Http11AprProtocol] requires the APR/native library which is not available

Tobia

Asked: 2016-09-24 04:02:19 +0800 CST

Exim4 邮件程序守护进程地址

0

我的 exim4 邮件服务器使用错误的扩展名发送通知，我的意思是：

Mail Delivery System <[email protected]>

此服务器是多域服务器，mydomain.err 是托管域之一，但不是主要域。我想设置主域和守护进程地址，但我在配置中找不到它，我在所有 exim 配置中做了一个 grep 来寻找 mydomain.err，我只在这里找到它：

dc_other_hostnames='maindomain.com;mydomain.err;otherdomain.com'

我在哪里可以更改守护程序地址和主域？

Tobia

Asked: 2016-08-23 23:15:40 +0800 CST

在 Dell PowerEdge T100 上监控 RAID

0

我有一个小型服务器 Dell PowerEdge T100，它带有一个 RAID1 阵列，该阵列由带有 Debian 5 的戴尔 RAID SAS 控制器构建，因此有什么方法可以监控它，和/或接收有关 RAID 错误的通知？似乎目前唯一的方法是重新启动，进入 SAS 实用程序，然后检查阵列状态。

Tobia

Asked: 2016-03-09 23:49:40 +0800 CST

了解 exim4 传出消息日志。我是垃圾邮件发送者吗？

3

今天我的邮箱收到了很多垃圾邮件，我查看了 exim4 日志，发现了一些可疑活动。

我想了解这种攻击的服务器性，如果我收到垃圾邮件，我可以删除它们并添加一些规则，但是我想确定我不是垃圾邮件发送者。

我阅读了许多这样的日志：

  2016-03-09 07:53:12 1adXzZ-0007sb-Pz <= [email protected] H=([127.0.0.1]) [129.137.152.170] P=esmtpa A=plain: S=1298 [email protected]
  2016-03-09 07:53:12 1adXzZ-0007sb-Pz no immediate delivery: more than 10 messages received in one connection
  2016-03-09 08:16:57 1adXzZ-0007sb-Pz => kamikaze_****@hotmail.co.uk R=dnslookup T=remote_smtp H=mx3.hotmail.com [207.46.8.167] X=TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256 CV=no DN="CN=*.hotmail.com" C="250  <[email protected]> Queued mail for delivery"
  2016-03-09 08:16:57 1adXzZ-0007sb-Pz Completed

请考虑：

kamikaze_****@hotmail.co.uk（我添加了一些星号以保护隐私）不是已知的收件人，这不是我服务器中的邮箱。
Realy 应该只允许经过身份验证的用户，在这里我没有找到任何身份验证信息。
在日志中有一个 250 和“已完成”，所以似乎没有引发错误。日志的符号是“=>”，表示传出消息...

所以，我是垃圾邮件发送者？我的服务器是否在未经身份验证的情况下发送邮件？

这是我的配置：

accept_8bitmime
acl_smtp_data = acl_check_data
acl_smtp_data_prdr = accept
acl_smtp_mail = acl_check_mail
acl_smtp_rcpt = acl_check_rcpt
admin_groups =
no_allow_domain_literals
no_allow_mx_to_ip
no_allow_utf8_domains
auth_advertise_hosts = *
auto_thaw = 0s
av_scanner = sophie:/var/run/sophie
bounce_return_body
bounce_return_message
bounce_return_size_limit = 100K
callout_domain_negative_expire = 3h
callout_domain_positive_expire = 1w
callout_negative_expire = 2h
callout_positive_expire = 1d
callout_random_local_part = $primary_hostname-$tod_epoch-testing
check_log_inodes = 0
check_log_space = 0
check_rfc2047_length
check_spool_inodes = 0
check_spool_space = 0
daemon_smtp_ports = smtp
daemon_startup_retries = 9
daemon_startup_sleep = 30s
delay_warning = 1d
delay_warning_condition = ${if or {{ !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }{ match{$h_precedence:}{(?i)bulk|list|junk} }{ match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }} {no}{yes}}
no_deliver_drop_privilege
deliver_queue_load_max =
delivery_date_remove
no_disable_ipv6
dkim_verify_signers = $dkim_signers
dns_check_names_pattern = (?i)^(?>(?(1)\.|())[^\W](?>[a-z0-9/_-]*[^\W])?)+(\.?)$
dns_csa_search_limit = 5
dns_csa_use_reverse
dns_dnssec_ok = -1
dns_retrans = 0s
dns_retry = 0
dns_use_edns0 = -1
no_drop_cr
dsn_from = Mail Delivery System <Mailer-Daemon@$qualify_domain>
envelope_to_remove
exim_group = Debian-exim
exim_path = /usr/sbin/exim4
exim_user = Debian-exim
extract_addresses_remove_arguments
finduser_retries = 0
freeze_tell = postmaster
gecos_name = $1
gecos_pattern = ^([^,:]*)
no_gnutls_allow_auto_pkcs11
no_gnutls_compat_mode
header_line_maxsize = 0
header_maxsize = 1048576
headers_charset = UTF-8
helo_allow_chars = _
helo_lookup_domains = @ : @[]
host_lookup = *
host_lookup_order = bydns:byaddr
ignore_bounce_errors_after = 2d
no_ignore_fromline_local
keep_malformed = 4d
no_ldap_start_tls
ldap_version = -1
no_local_from_check
local_interfaces = <; ::0 ; 0.0.0.0
local_scan_timeout = 5m
local_sender_retain
log_file_path = /var/log/exim4/%slog
log_selector = +smtp_protocol_error +smtp_syntax_error +tls_certificate_verified +tls_peerdn
no_log_timezone
lookup_open_max = 25
max_username_length = 0
no_message_body_newlines
message_body_visible = 500
message_logs
message_size_limit = 50M
no_move_frozen_messages
no_mua_wrapper
mysql_servers = localhost/system/exim/mypassw
never_users =
no_perl_at_start
pid_file_path = /var/run/exim4/exim.pid
pipelining_advertise_hosts = *
prdr_enable
no_preserve_message_logs
primary_hostname = srv1.mydomain.com
no_print_topbitchars
process_log_path = /var/spool/exim4/exim-process.info
prod_requires_admin
qualify_domain = mydomain.com
qualify_recipient = mydomain.com
queue_list_requires_admin
no_queue_only
queue_only_load =
queue_only_load_latch
queue_only_override
no_queue_run_in_order
queue_run_max = 5
receive_timeout = 0s
received_header_text = Received: ${if def:sender_rcvhost {from $sender_rcvhost\n\t}{${if def:sender_ident {from ${quote_local_part:$sender_ident} }}${if def:sender_helo_name {(helo=$sender_helo_name)\n\t}}}}by $primary_hostname ${if def:received_protocol {with $received_protocol}} ${if def:tls_cipher {($tls_cipher)\n\t}}(Exim $version_number)\n\t${if def:sender_address {(envelope-from <$sender_address>)\n\t}}id $message_exim_id${if def:received_for {\n\tfor $received_for}}
received_headers_max = 30
recipients_max = 0
no_recipients_max_reject
remote_max_parallel = 2
retry_data_expire = 1w
retry_interval_max = 1d
return_path_remove
rfc1413_hosts = @[]
rfc1413_query_timeout = 0s
slow_lookup_log = 0
smtp_accept_keepalive
smtp_accept_max = 20
smtp_accept_max_nonmail = 10
smtp_accept_max_nonmail_hosts = *
smtp_accept_max_per_connection = 1000
smtp_accept_queue = 0
smtp_accept_queue_per_connection = 10
smtp_accept_reserve = 0
smtp_banner = $smtp_active_hostname ESMTP Exim $version_number Ubuntu $tod_full
smtp_check_spool_space
smtp_connect_backlog = 20
smtp_enforce_sync
smtp_etrn_serialize
smtp_load_reserve =
smtp_max_synprot_errors = 3
smtp_max_unknown_commands = 3
no_smtp_return_error_details
spamd_address = 127.0.0.1 783
no_split_spool_directory
spool_directory = /var/spool/exim4
sqlite_lock_timeout = 5
no_strict_acl_vars
no_strip_excess_angle_brackets
no_strip_trailing_dot
syslog_duplication
syslog_processname = exim
syslog_timestamp
tcp_nodelay
timeout_frozen_after = 1w
tls_advertise_hosts = *
tls_certificate = /etc/exim4/exim.crt
tls_dh_max_bits = 2236
tls_eccurve = prime256v1
tls_on_connect_ports = 465
tls_privatekey = /etc/exim4/exim.key
no_tls_remember_esmtp
tls_verify_certificates = ${if exists{/etc/ssl/certs/ca-certificates.crt}{/etc/ssl/certs/ca-certificates.crt}{/dev/null}}
trusted_groups =
trusted_users = uucp
untrusted_set_sender = *
uucp_from_pattern = ^From\s+(\S+)\s+(?:[a-zA-Z]{3},?\s+)?(?:[a-zA-Z]{3}\s+\d?\d|\d?\d\s+[a-zA-Z]{3}\s+\d\d(?:\d\d)?)\s+\d\d?:\d\d?
uucp_from_sender = $1
write_rejectlog

这是 PLAIN 验证器：

plain:
driver                          = plaintext
public_name                     = PLAIN
server_advertise_condition      = yes
server_condition                = ${if eq{$3}{${lookup mysql{ SELECT password FROM users WHERE CONCAT(username,'@',domain)='${quote_mysql:$2}' AND smtp>0 }}}{yes}{no}}
server_set_id                   = $2

Tobia

Asked: 2016-01-08 11:46:17 +0800 CST

Exim 服务器和黑名单登录尝试次数过多

2

这是今天的 exim 拒绝日志：

2016-01-07 13:48:44 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 15:32:09 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 15:41:35 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 15:49:01 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 15:56:50 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 16:04:58 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 16:12:28 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 16:20:19 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 16:28:08 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 16:35:50 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 16:43:28 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 16:51:18 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 16:58:51 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 17:06:25 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 17:13:58 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 17:21:29 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 17:28:52 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 17:36:18 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 17:43:43 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 17:51:46 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 17:59:08 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 18:06:44 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 18:14:10 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 18:21:39 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 18:29:02 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 18:36:36 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 18:44:00 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 18:51:21 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 18:58:40 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 19:05:59 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 19:13:18 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 19:20:42 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 19:28:03 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 19:35:48 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 19:43:11 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 19:50:35 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 19:57:59 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 20:05:25 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 20:12:51 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 20:20:17 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 20:27:41 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])
2016-01-07 20:35:06 login authenticator failed for (USER) [212.224.87.119]: 535 Incorrect authentication data ([email protected])

我不想等待，什么也不做，是否可以为 exim 创建一个黑名单，在 1 小时内填充超过 10 次登录尝试的 IP 地址？

请注意，我想为 smtp 登录尝试创建一个黑名单，而不是为电子邮件发件人创建一个黑名单。

Tobia

Asked: 2015-12-23 13:22:12 +0800 CST

Exim4 配置扩展 $message_headers 变量以提取消息主题

1

我必须向外部程序发送从 Exim 服务器接收到的每个消息主题。

这是我的acl_smtp_data配置：

warn condition = ${lookup mysql{ INSERT INTO maillog ( subject ) VALUES ( '${quote_mysql:$message_headers}'}{$value}fail}

这可行，但我只想保存“主题”标题而不是所有标题。我找不到仅适用于主题的变量，也许我可以从 $message_headers var 的所有标题中提取它。

Tobia

Asked: 2015-12-17 03:32:09 +0800 CST

MX 优先级服务器行为

10

这是一个关于 MX 协议优先级的问题。如果我有两个具有不同优先级的 MX 服务器：

MX 10 服务器A
MX 20 服务器 B

协议是否保证首选 MX 10？提交者是否可以出于除主要可用性之外的任何其他原因选择次要的？

换句话说：如果我的 serverA MX 运行良好并且具有（理论上的）无限连接容量，我可以确定没有人会尝试连接到 serverB 吗？

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