도커 컨테이너가 다음과 같이 실행됩니다.
docker run --name some_container_1 -p 8080:80 -d some_image
어느 것이 잘 작동합니까? 컨테이너는 포트 80 ~ 8080을 나타내며 localhost에서 액세스 할 수 있습니다.
그러나 어떤 이유로 든 입력 iptables 규칙을 완전히 무시하고 외부에서도 액세스 할 수 있습니다.
IP 123.456.789.0 만 외부에서 액세스 할 수 있도록 Docker 컨테이너에 대한 액세스를 제한하려면 어떻게해야합니까?
감사.
sudo iptables -L -n -v-행 번호
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
num pkts bytes target prot opt in out source destination
1 0 0 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0
2 365 23380 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
3 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:22
4 7 788 LOG all -- * * 0.0.0.0/0 0.0.0.0/0 limit: avg 5/min burst 5 LOG flags 0 level 7 prefix "iptables denied: "
5 7 788 DROP all -- * * 0.0.0.0/0 0.0.0.0/0
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
num pkts bytes target prot opt in out source destination
1 24 1524 DOCKER all -- * docker0 0.0.0.0/0 0.0.0.0/0
2 0 0 ACCEPT all -- * docker0 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
3 15 13320 ACCEPT all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0
4 0 0 ACCEPT all -- docker0 docker0 0.0.0.0/0 0.0.0.0/0
Chain OUTPUT (policy ACCEPT 204 packets, 21792 bytes)
num pkts bytes target prot opt in out source destination
Chain DOCKER (1 references)
num pkts bytes target prot opt in out source destination
1 24 1524 ACCEPT tcp -- !docker0 docker0 0.0.0.0/0 172.17.0.2 tcp dpt:80
sudo iptables-save
# Generated by iptables-save v1.4.21 on Wed Apr 8 23:37:43 2015
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [100:16642]
:DOCKER - [0:0]
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7
-A INPUT -j DROP
-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
-A DOCKER -d 172.17.0.2/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 80 -j ACCEPT
COMMIT
# Completed on Wed Apr 8 23:37:43 2015
# Generated by iptables-save v1.4.21 on Wed Apr 8 23:37:43 2015
*nat
:PREROUTING ACCEPT [13:2206]
:INPUT ACCEPT [1:64]
:OUTPUT ACCEPT [4:268]
:POSTROUTING ACCEPT [4:268]
: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
-A POSTROUTING -s 172.17.0.2/32 -d 172.17.0.2/32 -p tcp -m tcp --dport 80 -j MASQUERADE
-A DOCKER ! -i docker0 -p tcp -m tcp --dport 8080 -j DNAT --to-destination 172.17.0.2:80
COMMIT
# Completed on Wed Apr 8 23:37:43 2015
도커 정보
Containers: 1
Images: 25
Storage Driver: aufs
Root Dir: /var/lib/docker/aufs
Backing Filesystem: extfs
Dirs: 27
Execution Driver: native-0.2
Kernel Version: 3.16.0-4-amd64
Operating System: Debian GNU/Linux 8 (jessie)
CPUs: 4
Total Memory: 7.746 GiB
Name: nuc-001
ID: WCMU:MN3T:VFKR:IU42:6423:OEI6:IB5Q:WBNV:K75H:JZDS:UWU5:57WD
WARNING: No memory limit support
WARNING: No swap limit support
downvoter가 설명 할 수 있습니까?
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binaryanomaly
의 출력을 보여줄 수 있습니까
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ComputerDruid
iptables-save
? 도 커가 포트 변환을 수행하는 방식이 MASQUERADE / NAT를 통한 iptables 규칙에 있다고 생각하지만 실제로는 모르겠습니다