About IPFS establish connection

Thanks for reply!

Hmm.
Here is the output of the netstat -lptn :

tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 16861/ipfs
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 13392/sshd
tcp 0 0 0.0.0.0:4001 0.0.0.0:* LISTEN 16861/ipfs
tcp 0 0 127.0.0.1:9094 0.0.0.0:* LISTEN 16869/ipfs-cluster-
tcp 0 0 127.0.0.1:9095 0.0.0.0:* LISTEN 16869/ipfs-cluster-
tcp 0 0 0.0.0.0:9096 0.0.0.0:* LISTEN 16869/ipfs-cluster-
tcp 0 0 127.0.0.1:5001 0.0.0.0:* LISTEN 16861/ipfs
tcp6 0 0 :::22 :::* LISTEN 13392/sshd
tcp6 0 0 :::4001 :::* LISTEN 16861/ipfs

What am I missing?

That’s odd. I think I’m stumped by your issue.