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11.19.2008 at 01:29AM PST, ID: 23917133
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8.5

What traffic shoudl I block/allow on a networked laptop?

Asked by ChrisCranie in Enterprise Firewalls, Miscellaneous Networking, Net BIOS and NetBEUI

Tags: ,

Morning,
I'm currently looking at Sophos Client Firewall for our laptop users, but my question is more related to networking in general I think. I'm running it in default mode for now to analyse the type of traffic coming in/out of the client. Our LAN is on 192.168.0.x, 255.255.255.0.

The following entries have been blocked, I'm ideally looking for a brief explanation of what they might be and whether I should be allowing them; the time period (9.03 to 9.10am) included powering on, logging on, and loading up Outlook. I've got VMWare installed on the laptop, but no VMs running at powerup.

09:09:57      netbios      IN REFUSED       UDP      172.50.10.1      NETBIOS_DGM      Block NetBIOS Traffic
09:09:57      netbios      IN REFUSED       UDP      172.50.10.3      NETBIOS_DGM      Block NetBIOS Traffic
09:09:57      netbios      IN REFUSED       UDP      172.50.10.5      NETBIOS_DGM      Block NetBIOS Traffic
09:09:57      netbios      IN REFUSED       UDP      172.50.10.4      NETBIOS_DGM      Block NetBIOS Traffic
09:09:57      netbios      IN REFUSED       UDP      172.50.10.2      NETBIOS_DGM      Block NetBIOS Traffic
09:08:40      svchost.exe      IN REFUSED       UDP      192.168.1.254      1900      Block All Activity
09:07:23      system      IN REFUSED       UDP      localhost(any)      BOOTPC      Block All Activity
09:06:54      netbios      IN REFUSED       UDP      172.50.10.4      NETBIOS_DGM      Block NetBIOS Traffic
09:05:42      system      IN REFUSED       UDP      localhost(any)      BOOTPC      Block All Activity
09:04:32      netbios      OUT REFUSED       UDP      192.168.234.255      NETBIOS_NS      Block NetBIOS Traffic
09:04:29      netbios      OUT REFUSED       UDP      192.168.198.255      NETBIOS_NS      Block NetBIOS Traffic
09:04:27      system      IN REFUSED       UDP      192.168.198.1      1119      Block All Activity
09:04:27      system      IN REFUSED       UDP      192.168.234.1      1120      Block All Activity
09:04:18      svchost.exe      IN REFUSED       UDP      192.168.198.1      1119      Block All Activity
09:04:18      system      IN REFUSED       UDP      localhost      1122      Block Transit Packets
09:04:18      svchost.exe      IN REFUSED       UDP      192.168.234.1      1120      Block All Activity
09:04:09      system      IN REFUSED       UDP      localhost      1099      Block Transit Packets
09:04:08      system      OUT REFUSED       IGMP      224.0.0.22      0      Learning Mode
09:04:08      system      OUT REFUSED       IGMP      224.0.0.22      0      Learning Mode
09:04:08      system      OUT REFUSED       IGMP      224.0.0.22      0      Learning Mode
09:03:44      netbios      OUT REFUSED       UDP      192.168.198.1      NETBIOS_NS      Block NetBIOS Traffic
09:03:44      netbios      OUT REFUSED       UDP      192.168.198.1      NETBIOS_NS      Block NetBIOS Traffic
09:03:44      netbios      OUT REFUSED       UDP      192.168.198.1      NETBIOS_NS      Block NetBIOS Traffic
09:03:39      netbios      OUT REFUSED       UDP      192.168.234.1      NETBIOS_NS      Block NetBIOS Traffic
09:03:39      netbios      OUT REFUSED       UDP      192.168.234.1      NETBIOS_NS      Block NetBIOS Traffic
09:03:39      netbios      OUT REFUSED       UDP      192.168.234.1      NETBIOS_NS      Block NetBIOS Traffic
09:03:33      netbios      OUT REFUSED       UDP      192.168.234.255      NETBIOS_DGM      Block NetBIOS Traffic
09:03:33      netbios      OUT REFUSED       UDP      192.168.198.255      NETBIOS_DGM      Block NetBIOS Traffic
09:03:09      netbios      OUT REFUSED       UDP      192.168.234.255      NETBIOS_NS      Block NetBIOS Traffic
09:03:06      netbios      OUT REFUSED       UDP      192.168.198.255      NETBIOS_NS      Block NetBIOS Traffic

Regards,
Chris.Start Free Trial
[+][-]11.19.2008 at 02:08AM PST, ID: 22992855

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[+][-]11.19.2008 at 04:26AM PST, ID: 22993476

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[+][-]11.19.2008 at 04:47AM PST, ID: 22993585

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[+][-]11.19.2008 at 05:20AM PST, ID: 22993827

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About this solution

Zones: Enterprise Firewalls, Miscellaneous Networking, Net BIOS and NetBEUI
Tags: Sophos, Client Firewall
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Solution Provided By: Darr247
Participating Experts: 2
Solution Grade: A
 
 
[+][-]11.26.2008 at 08:59AM PST, ID: 23043643

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