Odd stuff, port 139 and Zone Alarm

Fred_G · 15-September-06, 10:44 PM

I have some odd stuff hopefully someone can help me clarifyl. Quick network map: 2 computers in one building with cable internet. Let's call them comp 1 and 2.

I have a cat 5 line run to a router with 2 computers on it (comp 3 and 4), and then another router in another room with comp 5 and 6 running off of it. Computer 1 has Zone Alarm, and is getting frequent pop ups from Zone Alart about blocking 192.168.1.102, and a reference about port 139. I did a little research on that port, and think I would like to block it. The computers access the internet through cable, but only comp 1 and 2 occaisionally transfer files.

I checked my router's log and got this:

Firewall log:
Fri Sep 15 20:57:31 2006 1 Blocked by DoS protection 192.168.0.101
Fri Sep 15 20:57:32 2006 1 Blocked by DoS protection 192.168.0.101
Fri Sep 15 20:57:32 2006 1 Blocked by DoS protection 192.168.0.101
Fri Sep 15 20:57:33 2006 1 Blocked by DoS protection 192.168.0.101
Fri Sep 15 20:57:34 2006 1 Blocked by DoS protection 192.168.0.101
Fri Sep 15 21:02:34 2006 1 Blocked by DoS protection 192.168.0.101
Fri Sep 15 21:09:07 2006 1 Blocked by DoS protection 192.168.0.102
Fri Sep 15 21:09:30 2006 1 Blocked by DoS protection 192.168.0.101
Fri Sep 15 21:09:44 2006 1 Blocked by DoS protection 192.168.0.102
Fri Sep 15 21:09:50 2006 1 Blocked by DoS protection 192.168.0.101
Fri Sep 15 21:09:50 2006 1 Blocked by DoS protection 192.168.0.101

It is longer, but I think you get the idea. I think I am going to rearange some routers. Mine seems to be blocking this, but in the other building the router is not.

Any ideas would be greatly appreciated.

Thanks for your time.

E

mrcracker · 27-September-06, 09:45 AM

139 is the Windows Netbios/file sharing port. It should definitely be blocked at the internet firewall. On an internal network, it's necessary for Windows file sharing.

15-September-06, 10:44 PM		#1 (permalink)
Fred_G !! Sm-hoe-k Free !!	Odd stuff, port 139 and Zone Alarm I have some odd stuff hopefully someone can help me clarifyl. Quick network map: 2 computers in one building with cable internet. Let's call them comp 1 and 2. I have a cat 5 line run to a router with 2 computers on it (comp 3 and 4), and then another router in another room with comp 5 and 6 running off of it. Computer 1 has Zone Alarm, and is getting frequent pop ups from Zone Alart about blocking 192.168.1.102, and a reference about port 139. I did a little research on that port, and think I would like to block it. The computers access the internet through cable, but only comp 1 and 2 occaisionally transfer files. I checked my router's log and got this: Firewall log: Fri Sep 15 20:57:31 2006 1 Blocked by DoS protection 192.168.0.101 Fri Sep 15 20:57:32 2006 1 Blocked by DoS protection 192.168.0.101 Fri Sep 15 20:57:32 2006 1 Blocked by DoS protection 192.168.0.101 Fri Sep 15 20:57:33 2006 1 Blocked by DoS protection 192.168.0.101 Fri Sep 15 20:57:34 2006 1 Blocked by DoS protection 192.168.0.101 Fri Sep 15 21:02:34 2006 1 Blocked by DoS protection 192.168.0.101 Fri Sep 15 21:09:07 2006 1 Blocked by DoS protection 192.168.0.102 Fri Sep 15 21:09:30 2006 1 Blocked by DoS protection 192.168.0.101 Fri Sep 15 21:09:44 2006 1 Blocked by DoS protection 192.168.0.102 Fri Sep 15 21:09:50 2006 1 Blocked by DoS protection 192.168.0.101 Fri Sep 15 21:09:50 2006 1 Blocked by DoS protection 192.168.0.101 It is longer, but I think you get the idea. I think I am going to rearange some routers. Mine seems to be blocking this, but in the other building the router is not. Any ideas would be greatly appreciated. Thanks for your time. E

27-September-06, 09:45 AM		#2 (permalink)
mrcracker Apex Master Tech Apprentice	Re: Odd stuff, port 139 and Zone Alarm 139 is the Windows Netbios/file sharing port. It should definitely be blocked at the internet firewall. On an internal network, it's necessary for Windows file sharing.

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