Does anyone know anything about these strange addresses?
I have several IP addresses which are persistently connecting to my mail server, but apparently not sending anything.
18.104.22.168 - duoquattuorsx.zeta.ec-cluster.com
22.214.171.124 - duoquattuorquinque.zeta.ec-cluster.com
126.96.36.199 - duoquattuorocto.zeta.ec-cluster.com
In spite of the Italian names, the IP's are in Germany.
I get very worried when strange IP's connect to my mail server for no apparent reason. I get this :-
10:28:40 415 DMN: MSG 4730 Accepted connection: [188.8.131.52] (duoquattuorsx.zeta.ec-cluster.com)
10:28:40 415 DMN: MSG 4730 SMTP session ended: [184.108.40.206] (duoquattuorsx.zeta.ec-cluster.com)
The IP's change - today I had all three 7 times in total.
Anyone have any ideas, or should I just kill them on the Firewall?