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sonicwall to block msn messenger file transfer

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20 years 1 month ago - 11 years 9 months ago #5433 by rootcipher
sonicwall to block msn messenger file transfer was created by rootcipher
Does anyone know how to configure sonicwall to block msn messenger file transfers ?
Last edit: 11 years 9 months ago by Chris.
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20 years 1 month ago #5434 by sahirh
Replied by sahirh on topic Re: sonicwall to block msn messenger file transfer
Ports 6891-6900 enable File send
Sahir Hidayatullah.
Firewall.cx Staff - Associate Editor & Security Advisor
tftfotw.blogspot.com
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20 years 1 month ago #5443 by rootcipher
Replied by rootcipher on topic Re: sonicwall to block msn messenger file transfer
we only open port 1863 in our ISA server.
we use a sniffer but there are no ports other than 1863 that msn is using.
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20 years 1 month ago #5446 by nske
Replied by nske on topic Re: sonicwall to block msn messenger file transfer
I think in port 1863 MSN messenger connects to the Microsoft's Server which coordinates everything and transfers the text of each chat session. For file transfers, MSN messenger connects directly to the other person to initiate the file transfer, opening port 6891 for the first transfer, 6892 for the second etc.
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20 years 1 month ago #5483 by rootcipher
Replied by rootcipher on topic Re: sonicwall to block msn messenger file transfer
so how can i block file transfer between msn users in the same network
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20 years 1 month ago #5484 by nske
Replied by nske on topic Re: sonicwall to block msn messenger file transfer
If you block connections from these ports you should be ok (I've tested it in the past). But in case a firewall is not intercepted between the hosts that you wish to control, you will have to block connections from these ports on each computer locally.
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