Iptables

https://morphyhu.szitcare.com/wordpress/?p=1314 New docker use DOCKER-USER Important!! check host route & login docker container check route. and iptables -L -t nat POSTROUTING MASQUERADE 172.17.0.0/16 must same submask. EX: host route have 172.17.0.0, 172.18.0.0, 172.19.0.0, 172.20.0.0 docker insdie route use 172.18.0.0 iptables MASQUERADE use 172.17.0.0 Docker Internet is failed. So add iptables -t nat -A POSTROUTING -s 172.18.0.0/16 ! -o docker0 -j MASQUERADE #启动后默认增加的规则 iptables -N DOCKER iptables -N DOCKER-ISOLATION-STAGE-1 iptables -N DOCKER-ISOLATION-STAGE-2 iptables -N DOCKER-USER iptables -t nat -N DOCKER iptables -t nat -A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER iptables -t nat -A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER iptables -t nat -A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE iptables -t nat -A DOCKER -i docker0 -j RETURN iptables -A FORWARD -j DOCKER-USER iptables -A FORWARD -j DOCKER-ISOLATION-STAGE-1 iptables -A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -o docker0 -j DOCKER iptables -A FORWARD -i docker0 ! -o docker0 -j ACCEPT iptables -A FORWARD -i docker0 -o docker0 -j ACCEPT iptables -A DOCKER-ISOLATION-STAGE-1 -i docker0 ! -o docker0 -j DOCKER-ISOLATION-STAGE-2 iptables -A DOCKER-ISOLATION-STAGE-1 -j RETURN iptables -A DOCKER-ISOLATION-STAGE-2 -o docker0 -j DROP iptables -A DOCKER-ISOLATION-STAGE-2 -j RETURN iptables -A DOCKER-USER -j RETURN #docker run --name smokeping -d -p 82:80 -e PUID=1000 -e PGID=1000 -e TZ=Asia/Shanghai -v /data/smokeping/data:/data -v /data/smokeping/config:/config linuxserver/smokeping #启动上述镜像后默认增加的规则 iptables -t nat -A POSTROUTING -s 172.17.0.2/32 -d 172.17.0.2/32 -p tcp -m tcp --dport 80 -j MASQUERADE iptables -t nat -A DOCKER ! -i docker0 -p tcp -m tcp --dport 82 -j DNAT --to-destination 172.17.0.2:80 iptables -A DOCKER -d 172.17.0.2/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 80 -j ACCEPT sudo iptable ...

FireHOL is a language (and a program to run it) which builds secure, stateful firewalls from easy to understand, human-readable configurations. The configurations stay readable even for very complex setups.

http://sueboy.blogspot.com/2018/11/docker-iptables_12.html sudo iptables -vnL ======NAT===== sudo iptables -t nat -vnL 顯示行數 sudo iptables -t nat -L POSTROUTING -n –line-numbers -D 刪除那行 sudo iptables -t nat -D POSTROUTING x x is which line delete 確認docker網段補上 sudo iptables -t nat -A POSTROUTING -s 172.19.0.0/16 ! -o docker0 -j MASQUERADE

restart docker service iptables be reset Docker Basic rule (New Docker maybe change somethings) *nat :PREROUTING ACCEPT [27:11935] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [598:57368] :POSTROUTING ACCEPT [591:57092] :DOCKER - [0:0] -A PREROUTING -m addrtype –dst-type LOCAL -j DOCKER -A OUTPUT ! -d 127.0.0.0/8 -m addrtype –dst-type LOCAL -j DOCKER -A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE COMMIT # Completed on Sun Sep 20 17:35:31 2015 # Generated by iptables-save v1.4.21 on Sun Sep 20 17:35:31 2015 *filter :INPUT ACCEPT [139291:461018923] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [127386:5251162] :DOCKER - [0:0] -A FORWARD -o docker0 -j DOCKER -A FORWARD -o docker0 -m conntrack –ctstate RELATED,ESTABLISHED -j ACCEPT -A FORWARD -i docker0 ! -o docker0 -j ACCEPT -A FORWARD -i docker0 -o docker0 -j ACCEPT COMMIT # Completed on Sun Sep 20 17:35:31 2015 ...

http://blog.pulipuli.info/2011/07/ http://linux.vbird.org/linux_server/0250simple_firewall.php iptables \[-AI 鏈\] \[-io 網路介面\] \[-p tcp,udp\] \\ \> \[-s 來源IP/網域\] \[--sport 埠口範圍\] \\ \> \[-d 目標IP/網域\] \[--dport 埠口範圍\] -j \[ACCEPT|DROP|REJECT\] 選項與參數： \--sport 埠口範圍：限制來源的埠口號碼，埠口號碼可以是連續的，例如 1024:65535 \--dport 埠口範圍：限制目標的埠口號碼。 \[root@www ~\]# iptables -A INPUT \[-m state\] \[--state 狀態\] 選項與參數： \-m ：一些 iptables 的外掛模組，主要常見的有： state ：狀態模組 mac ：網路卡硬體位址 (hardware address) \--state ：一些封包的狀態，主要有： INVALID ：無效的封包，例如資料破損的封包狀態 ESTABLISHED：已經連線成功的連線狀態； NEW ：想要新建立連線的封包狀態； RELATED ：這個最常用！表示這個封包是與我們主機發送出去的封包有關 範例：只要已建立或相關封包就予以通過，只要是不合法封包就丟棄 \[root@www ~\]# iptables -A INPUT -m state \\ \> \--state RELATED,ESTABLISHED -j ACCEPT \[root@www ~\]# iptables -A INPUT -m state --state INVALID -j DROP https://www.booleanworld.com/depth-guide-iptables-linux-firewall/ https://www.lammertbies.nl/comm/info/iptables.html ...