Telnet port failed in specific container, in host machine and other container is ok

General
1

Hi heroes,
I got an issue that telnet remote_ip:3801 failed in specific container, but in other containers on same host machine or host machine itself, telnet is ok. any possible reasons?

docker exec -it 2ef371fcb2a5 sh
/ # wget 192.168.48.228:3801
Connecting to 192.168.48.228:3801 (192.168.48.228:3801)
…/after some minutes
wget: download timed out

Things i tried:

  • restart docker service

  • restart this specific container

  • docker ps -a
    c9ff05acfa3b — telnet ok
    2ef371fcb2a5 —telnet not ok

  • docker network ls
    NETWORK ID NAME DRIVER SCOPE
    c232929497d8 bridge bridge local
    09673c18fd4f host host local
    10fa3f44955b insight_bridge bridge local
    aef4c8b7d35d none null local

  • docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    inet 172.17.0.1/16 scope global docker0

  • docker network inspect insight_bridge
    “Name”: “insight_bridge”,
    “Id”: “10fa3f44955b7ff39644812be45357e0fd607dd39d673a215b6da12a4ad75ba8”,
    “Created”: “2024-05-27T01:08:41.866400382+08:00”,
    “Scope”: “local”,
    “Driver”: “bridge”,
    “EnableIPv6”: false,
    “IPAM”: {
    “Driver”: “default”,
    “Options”: {},
    “Config”: [
    {
    “Subnet”: “172.18.0.0/16”,
    “Gateway”: “172.18.0.1”

  • docker inspect c9ff05acfa3b
    “NetworkID”: “10fa3f44955b7ff39644812be45357e0fd607dd39d673a215b6da12a4ad75ba8”,
    “EndpointID”: “ec03e2bff7d77e84d75b18b51dc2ed428cdf0e116d67523761116ac8be2bd146”,
    “Gateway”: “172.18.0.1”,
    “IPAddress”: “172.18.0.3”,

  • docker inspect 2ef371fcb2a5
    “NetworkID”: “10fa3f44955b7ff39644812be45357e0fd607dd39d673a215b6da12a4ad75ba8”,
    “EndpointID”: “d424c1302cef640413bd4a87ad88b8d22ec3cabb165d9d4eff4da9541e2335a9”,
    “Gateway”: “172.18.0.1”,
    “IPAddress”: “172.18.0.6”,

  • hostname machine
    ip route show
    default via 192.168.48.1 dev eth0 proto static metric 100
    172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1
    172.18.0.0/16 dev br-10fa3f44955b proto kernel scope link src 172.18.0.1
    192.168.48.0/24 dev eth0 proto kernel scope link src 192.168.48.234 metric 100

  • docker exec -it c9ff05acfa3b sh -c ‘ip route show’
    default via 172.18.0.1 dev eth0
    172.18.0.0/16 dev eth0 scope link src 172.18.0.3

  • docker exec -it 2ef371fcb2a5 sh -c ‘ip route show’
    default via 172.18.0.1 dev eth0
    172.18.0.0/16 dev eth0 scope link src 172.18.0.6