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Zonealarm blocking ICMP

Snarf
Grafter
Posts: 340
Thanks: 4
Registered: 04-08-2007

Zonealarm blocking ICMP

Hi,

I've been looking at my Zonealarm logs and have noticed that over the past couple of days it's blocked a couple of incoming requests from another PlusNet user (domain will be revealed if it's deemed necessary to appropriate people).

Zonealarm is detecting that these are ICMP (type:3/subtype:3) and is blocking them as a medium threat.

Can anyone decode the above for me and let me know whether I should be contacting PlusNet about this user?
2 REPLIES
Community Veteran
Posts: 14,469
Registered: 30-07-2007

Zonealarm blocking ICMP

Nothing to worry about. ICMP type 3 is destination unreachable.

If you are just getting a gfew ignore it (your firewall is doing it's job), if you are getting 1000s then report them to plusnet abuse dept (via contact us ticket).
Snarf
Grafter
Posts: 340
Thanks: 4
Registered: 04-08-2007

Zonealarm blocking ICMP

Ok cool thanks. Any idea why it might be trying to contact another PlusNet user? I saw some reference via Google that this sometimes happens during online gaming, but can't understand why.