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色々なport forwarding方法

Last updated at Posted at 2013-08-12

http://192.168.11.13:8080/ にアクセスすると http://10.0.3.2/ の画面を出す設定例

redirを使う方法

# lport : 転送先ポート、cport : 転送元ポート
redir --lport=8080 --cport=80
# IPアドレスを指定する場合
redir --lport=8080 --cport=80 --caddr=10.0.3.2
# バックグラウンドで動かす場合
nohup redir --lport=8080 --cport=80 &

stoneを使う方法

80->8080
$ stone 10.0.3.2:80 8080
22->443
$ sudo stone 10.0.3.2:22 443

iptables

設定初期化

$ sudo iptables -F

設定

forwarding.sh
# 変数
PUBLIC_IP=192.168.11.13
LXC_IP=10.0.3.2
HOST_PORT=8080
GUEST_PORT=80

# ルーティング
sudo iptables -t nat -A PREROUTING -p tcp -d $PUBLIC_IP --dport $HOST_PORT \
    -j DNAT --to-destination ${LXC_IP}:${GUEST_PORT}

# 通信許可設定(なくてもよい)
# sudo iptables -A FORWARD -p tcp -d $LXC_IP --dport $GUEST_PORT -j ACCEPT

# 必須
sudo iptables -t nat -A POSTROUTING -j MASQUERADE
  • iptablesの場合、localhost:8080 にアクセスしても 10.0.3.2:80に転送されません。

iptablesメモ

変更する番号を確認

iptables -nL --line-numbers

変更する場合

iptables -R INPUT [変更する番号] -s [変更するIP] -p tcp --dport 22 -j ACCEPT

削除

iptables -D INPUT [削除する番号]

port forwarding

iptables -A INPUT -p [tcp|udp] -s [送信元IP] --sport [送信元ポート] -d [送信先IP] --dport [送信先ポート] -j [ACCEPT|DROP|REJECT]

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