为什么我的服务器连接 127.0.0.1， src IP 总是 eth 上面的 IP？

防火墙加了环回

iptables -S INPUT
-P INPUT ACCEPT
-A INPUT -i lo -j ACCEPT

路由好像也没问题

# ip route show table local
broadcast x.x.55.0 dev eth0 proto kernel scope link src x.x.55.194
local x.x.55.194 dev eth0 proto kernel scope host src x.x.55.194
broadcast x.x.55.255 dev eth0 proto kernel scope link src x.x.55.194
broadcast 127.0.0.0 dev lo proto kernel scope link src 127.0.0.1
local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
local 127.0.0.1 dev lo proto kernel scope host src 127.0.0.1
broadcast 127.255.255.255 dev lo proto kernel scope link src 127.0.0.1