Nginx 之错误域集

Nginx

Provisional headers are shown

POST http://nicelinks.site/api/auth/login net::ERR_CONNECTION_RESET

如何从iptables中删除特定的规则？

2017/07/03 16:02:48 [emerg] 29168#29168: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: bind() to [::]:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: bind() to [::]:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: bind() to [::]:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: bind() to [::]:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: bind() to [::]:80 failed (98: Address already in use)
2017/07/03 16:02:48 [emerg] 29168#29168: still could not bind()

查看当前80端口的转发规则,使用命令

iptables -t nat -L -n  | grep 80

REDIRECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 redir ports 4000
REDIRECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 redir ports 80
REDIRECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 redir ports 80

这里也可以使用规则号码（外加参数 --line-numbers）：

iptables -t nat -L -n --line-numbers  | grep 80

1 REDIRECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 redir ports 4000
2 REDIRECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 redir ports 80

所以如果你想删除第二条规则，你可以做像这样:

iptables -D INPUT 2

如果您使用特定的表（例如nat），则必须将其添加到delete命令中：

sudo iptables -t nat -D PREROUTING 1

如此，能够很好的实现从iptables中删除特定的规则，感谢来自 How can I remove specific rules from iptables? 有效的回答。