为 HAProxy 和其他程序配置 iptables 规则

为 HAProxy 和其他程序配置 iptables 规则

我有以下相关设置HAProxy

defaults
    log             global
    mode            http
    option          httplog
    option          dontlognull
    retries         3
    option          redispatch
    maxconn         500
    contimeout      5s
    clitimeout      15s
    srvtimeout      15s

frontend public
    bind    *:80
    option  http-server-close
    option  http-pretend-keepalive
    option  forwardfor
    # ACLs
    ...

我在 中配置了三个后端(包括一个Nginx服务器)HAProxy,它们都监听 的不同端口127.0.0.1。我的iptables配置如下:

*filter

#  Allows all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0
-A INPUT -i lo -j ACCEPT
-A INPUT -i lo -d 127.0.0.0/8 -j REJECT

#  Accepts all established inbound connections
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

#  Allows all outbound traffic
#  You can modify this to only allow certain traffic
-A OUTPUT -j ACCEPT

#  Allows HTTP and HTTPS connections from anywhere (the normal ports for websites)
-A INPUT -p tcp --dport 80 -j ACCEPT
-A INPUT -p tcp --dport 443 -j ACCEPT

#  Allows SSH connections
#
#  THE -dport NUMBER IS THE SAME ONE YOU SET UP IN THE SSHD_CONFIG FILE
#
-A INPUT -p tcp -m state --state NEW --dport 22 -j ACCEPT

#  Allow ping
-A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT

#  log iptables denied calls
-A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7

#  Reject all other inbound - default deny unless explicitly allowed policy
-A INPUT -j REJECT
-A FORWARD -j REJECT

COMMIT

我的问题是:

  1. 上述iptables配置是否与我的配置中的设置/选项兼容HAProxy

  2. 我也在同一台机器上运行postgres和一个redis服务器,我需要调整哪些设置才能使它们一起工作iptables

答案1

  1. 是的,它们在不同的 OSI 层运行。
  2. 无,您已经允许本地主机连接。

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