Linux_配置iptables 设置端口可访问

由于博主直接关闭iptables，导致了服务器的宕机。 （病毒所致）

经过这件事后，博主学会了要把端口加入到iptables

示例:

#samba

#新增入站规则

-A INPUT -p tcp -m multiport --dports 139,445 -j ACCEPT

-A INPUT -p udp -m multiport --dports 137,138 -j ACCEPT

#新增出站规则

-A OUTPUT -p tcp -m multiport --sports 139,445 -j ACCEPT

-A OUTPUT -p udp -m multiport --sports 137,138 -j ACCEPT

#vncserver

-A INPUT -m state --state NEW -m tcp -p tcp --dport 5901 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 5902 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 5903 -j ACCEPT

上面分别针对samba 和 vncserver 开启了服务

注意点:

开放的端口 必须要在这两条命令之前:

#=========

-A INPUT -j REJECT --reject-with icmp-host-prohibited

-A FORWARD -j REJECT --reject-with icmp-host-prohibited

完整的配置文件:

# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*raw
:PREROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A PREROUTING -p tcp -m tcp --dport 22 -j NOTRACK
-A PREROUTING -p tcp -m tcp --sport 22 -j NOTRACK
-A PREROUTING -p tcp -m tcp --dport 80 -j NOTRACK
-A PREROUTING -p tcp -m tcp --sport 80 -j NOTRACK
-A OUTPUT -p tcp -m tcp --dport 22 -j NOTRACK
-A OUTPUT -p tcp -m tcp --sport 22 -j NOTRACK
-A OUTPUT -p tcp -m tcp --dport 80 -j NOTRACK
-A OUTPUT -p tcp -m tcp --sport 80 -j NOTRACK
COMMIT

*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state UNTRACKED -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 19 -j DROP
-A OUTPUT -m state --state NEW -m udp -p udp --dport 19 -j DROP
#samba
#新增入站规则
-A INPUT -p tcp -m multiport --dports 139,445 -j ACCEPT
-A INPUT -p udp -m multiport --dports 137,138 -j ACCEPT
#新增出站规则
-A OUTPUT -p tcp -m multiport --sports 139,445 -j ACCEPT
-A OUTPUT -p udp -m multiport --sports 137,138 -j ACCEPT
#vncserver
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5901 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5902 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5903 -j ACCEPT
#=========
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited

COMMIT