I have this unwanted network interface that is not allowing my machine to reach the mail server that has a 172.19. IP address.

I do not know where this comes from.

How do I get permanently rid of it?

br-3e7279f0a872: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    inet  netmask  broadcast
    inet6 fe80::42:f8ff:fee2:4926  prefixlen 64  scopeid 0x20<link>
    ether 02:42:f8:e2:49:26  txqueuelen 0  (Ethernet)
    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 134  bytes 16240 (16.2 KB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

This seems to work:

ip link set br-3e7279f0a872 down
brctl delbr br-3e7279f0a872
| improve this answer | |
  • this looks like a bridge interface. What about your interface setup ? no bridge somewhere ? – solsTiCe May 8 '18 at 13:20
  • 1
    found out it's a docker bridge – Thiago Sayão May 8 '18 at 13:39

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