Tag: CentOS5/iptables

目次

参考情報

設定

  • ssh/http(ポート番号22と80)はどこからでも許可にした
  • /etc/sysconfig/iptables を編集する
    *filter
    :INPUT ACCEPT [0:0]
    :FORWARD ACCEPT [0:0]
    :OUTPUT ACCEPT [0:0]
    :RH-Firewall-1-INPUT - [0:0]
    -A INPUT -j RH-Firewall-1-INPUT
    -A FORWARD -j RH-Firewall-1-INPUT
    -A RH-Firewall-1-INPUT -i lo -j ACCEPT
    -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT
    -A RH-Firewall-1-INPUT -p 50 -j ACCEPT
    -A RH-Firewall-1-INPUT -p 51 -j ACCEPT
    -A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT
    -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
    -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT
    -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
    -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
    -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
    -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
    COMMIT
    
  • iptablesを反映させる
    # /etc/init.d/iptables restart
  • iptablesの設定を確認しておく
    # iptables -L
    Chain INPUT (policy ACCEPT)
    target     prot opt source               destination         
    RH-Firewall-1-INPUT  all  --  anywhere             anywhere            
    
    Chain FORWARD (policy ACCEPT)
    target     prot opt source               destination         
    RH-Firewall-1-INPUT  all  --  anywhere             anywhere            
    
    Chain OUTPUT (policy ACCEPT)
    target     prot opt source               destination         
    
    Chain RH-Firewall-1-INPUT (2 references)
    target     prot opt source               destination         
    ACCEPT     all  --  anywhere             anywhere            
    ACCEPT     icmp --  anywhere             anywhere            icmp any 
    ACCEPT     esp  --  anywhere             anywhere            
    ACCEPT     ah   --  anywhere             anywhere            
    ACCEPT     udp  --  anywhere             224.0.0.251         udp dpt:mdns 
    ACCEPT     udp  --  anywhere             anywhere            udp dpt:ipp 
    ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ipp 
    ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED 
    ACCEPT     tcp  --  anywhere             anywhere            state NEW tcp dpt:http 
    ACCEPT     tcp  --  anywhere             anywhere            state NEW tcp dpt:10100 
    REJECT     all  --  anywhere             anywhere            reject-with icmp-host-prohibited 
    

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Last-modified: 2016-04-13 (水) 16:47:04 (1101d)