Ben gibi çalışan bir liman işçisi konteyner var:
docker run --name some_container_1 -p 8080:80 -d some_image
Hangi iyi çalışıyor. Kapsayıcı, 80 ila 8080 numaralı bağlantı noktasını açığa çıkarır ve localhost'tan erişilebilir.
Bazı nedenlerden dolayı INPUT iptables kurallarını tamamen görmezden gelir ve dışarıdan da erişilebilir.
Docker kapsayıcıya erişimi yalnızca IP 123.456.789.0'ın dışardan erişmesine izin verecek şekilde nasıl kısıtlayabilirim?
Teşekkürler.
sudo iptables -L -n -v - satır numaraları
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
liman işçisi bilgisi
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
iptables-save
? Docker'ın port çevirisinin MASQUERADE / NAT üzerinden bir iptables kuralı ile yapıldığından şüpheleniyorum, ama aslında bilmiyorum