Filter rule must be a single parameter

[Former user]

Getting error message in docker logs:

[-] PROGRAM ABORT : Filter rule must be a single parameter (use quotes). Location : main(), p0f.c:1166

It repeats every second. Can't figure out what's related to.

[Tommy]

I found you already solved this. Please close this.

Workaround: assuming container name is 'mailserver'

nsenter -n -t $(docker inspect --format {{.State.Pid}} mailserver) route -n

In case server has 2 NICs, output would be 2 default gateways. Remove one

nsenter -n -t $(docker inspect --format {{.State.Pid}} mailserver) route del default gw <IP>

[SH]

Please try run latest version (2.1) it should be fixed now