Is there a way to block ppl using Instant messenger recieving any files
I am not sure if this is answered previously but if someone knows and help me out here
Is there a way to block ppl using Instant messenger recieving any files thru that. Also How to block different peer to peer file sharing softwares out there. I have a PIX 515 (6.1). Any help will be greatly appreciated.
Re: Is there a way to block ppl using Instant messenger recievin
MSN uses TCP port 1863 for chat. Not sure but either it uses the same port or some high TCP port to transfer files. You can put a sniffer and see what ports is it sending the files through and block them. For your reference, below are some other port info.
common chat ports:-
tcp 1863 (msn)
tcp 6667 (irc) 6660- 6670 (the default being 6667).
tcp 6665-6669 (common IRC)
tcp 5190 (aol)
tcp 5190, dyn >=1024 (aol ICQ)
tcp/udp 5190-5193 (aol)
tcp/udp 4020 (ichat)
tcp 5000-5001 and udp 5000-5010 (Yahoo voice chat)
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...