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Accepted
rusty shackleford
Asked: 2018-06-08 04:41:37 +0800 CST

Linux - net.ipv4.conf.all [重复]

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我正在将arp_ignoreubuntu 16.04 服务器上的默认设置从默认值0更改为1.

我对目录的理解是，/proc/sys/net/ipv4/conf/目录下的文件all会影响所有的接口，并且default会影响新创建的接口。

将 的值更改为 后/proc/sys/net/ipv4/conf/all/arp_ignore，1其他文件仍设置为0：

cat /proc/sys/net/ipv4/conf/*/arp_ignore
1
0
0
0

的值是否/proc/sys/net/ipv4/conf/all/arp_ignore只是覆盖特定于接口的文件而不是更改它们的值？

linux ubuntu

1 个回答

  1. Best Answer

    我在这里找到了一些东西

        As far as I researched for IPv4 some time ago, the "default" value gets
copied to newly created interfaces only once.
"all" on the other hand allways gets applied in addition to the current
setting, but it depends on the exact setting, if its ORed, ANDed, or
whatevered:
    log_martians         OR
    accept_redirects     AND
    forwarding           ?
    mc_forwarding        AND
    medium_id
    proxy_arp            OR
    shared_media         OR
    secure_redirects     OR
    send_redirects       OR
    bootp_relay          AND
    accept_source_route  AND
    rp_filter            AND
    arp_filter           OR
    arp_announce         MAX
    arp_ignore           MAX
    arp_accept
    app_solicit
    disable_policy
    disable_xfrm
    tag
(see include/linux/inetdevice.h:83 for IN_DEV_{AND,OR,MAX}CONF)

Putting a new value in "all" doesn't change the value you read from
"$interface", but it only gets computed and used internally.
    • 1

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