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catalin's questions

Martin Hope
catalin
Asked: 2020-06-04 07:13:05 +0800 CST
  • 0

编辑：VM 从一个 hyper-v 移动到另一个。在第一个 hyper-v 中，它具有不同的 IP、掩码和网关，并且可以正常工作。然后我将其移至新的 hyper-v 并更改了网络详细信息。我使用了云提供商也提供的静态 MAC 地址。

我已将他们的信息分配给/etc/netplan/50-cloud-init.yaml 然后执行netplan apply 但是网络无法访问。是否有任何可能让 ubuntu 允许网关使用不同的子网？

编辑以提供 50-cloud-init.yaml 配置文件：

network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp: no
      addresses:
        - IP/MASK
      gateway4: GATEWAY_IP
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]

奇怪的是 route -s 根本不输出任何路由：

Kernel IP routing table
Destination    Gateway    Genmask    Flags Metric Ref  Use  Iface
networking netplan gateway
Martin Hope
catalin
Asked: 2020-05-27 05:18:14 +0800 CST
  • 1

希望在 ubuntu 18.04 上使用 iptables，我删除了 ufw 并安装了 iptables-persistent netfilter-persistent。编辑 /etc/iptables/rules.v4 并尝试启动 netfilter-persistent 服务。它正在工作，但最后的退出状态不是 0，可能是停止服务时出现问题。

iptables -nL 输出：

Chain INPUT (policy DROP)
target     prot opt source               destination         
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     tcp  --  192.168.1.129        0.0.0.0/0            tcp dpt:22
Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         


Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

服务状态：

root@my-server:/etc/iptables# systemctl status netfilter-persistent
● netfilter-persistent.service - netfilter persistent configuration
   Loaded: loaded (/lib/systemd/system/netfilter-persistent.service; enabled; vendor preset: enabled)
   Active: active (exited) since Tue 2020-05-26 12:39:17 UTC; 19min ago
  Process: 4402 ExecStop=/usr/sbin/netfilter-persistent stop (code=exited, status=1/FAILURE)
  Process: 4408 ExecStart=/usr/sbin/netfilter-persistent start (code=exited, status=0/SUCCESS)
 Main PID: 4408 (code=exited, status=0/SUCCESS)


May 26 12:39:17 my-webserver systemd[1]: Starting netfilter persistent configuration...
May 26 12:39:17 my-webserver netfilter-persistent[4408]: run-parts: executing /usr/share/netfilter-persistent/plugins.d/15-ip4tables start
May 26 12:39:17 my-webserver netfilter-persistent[4408]: run-parts: executing /usr/share/netfilter-persistent/plugins.d/25-ip6tables start
May 26 12:39:17 my-webserver systemd[1]: Started netfilter persistent configuration.

journalctl -e -u netfilter-persistent.service

May 26 12:39:01 my-webserver systemd[1]: Started netfilter persistent configuration.
May 26 12:39:17 my-webserver systemd[1]: Stopping netfilter persistent configuration...
May 26 12:39:17 my-webserver netfilter-persistent[4402]: Automatic flush disabled; use '/usr/sbin/netfilter-persistent flush'
May 26 12:39:17 my-webserver systemd[1]: netfilter-persistent.service: Control process exited, code=exited status=1
May 26 12:39:17 my-webserver systemd[1]: netfilter-persistent.service: Failed with result 'exit-code'.
May 26 12:39:17 my-webserver systemd[1]: Stopped netfilter persistent configuration.
May 26 12:39:17 my-webserver systemd[1]: Starting netfilter persistent configuration...
May 26 12:39:17 my-webserver netfilter-persistent[4408]: run-parts: executing /usr/share/netfilter-persistent/plugins.d/15-ip4tables start
May 26 12:39:17 my-webserver netfilter-persistent[4408]: run-parts: executing /usr/share/netfilter-persistent/plugins.d/25-ip6tables start
May 26 12:39:17 my-webserver systemd[1]: Started netfilter persistent configuration.
iptables firewall