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request time out on ISA network - 15.Feb.2008 10:55:02 AM

z_haseeb

Posts: 181
Joined: 15.Jun.2005
From: Karachi,Pakistan
Status: offline

i have a simple network
i hv just one ISA2004EE and two network are running behind ISA2004 EE
172.16.202.1-254
172.16.204.1-254
i unpluged one network bcuz when i am pluging the network (which i unpluged) all PC's of that network starts giving request time out to serve and to each other also....

but when i pluged both networks the infected network and ok network to a proxy server which is linux based on that server both networks are working fine....

someone said me that the infected network sending SYNC packets...and told me that i use the ETHEREAL software to check the sync packet which are basically chocking the network....

my second question is..is there any option in ISA2004 to stop broadcast?or limit user/ip to make particular connections with isa2004..

thanks
zahid

< Message edited by z_haseeb -- 15.Feb.2008 11:46:46 AM >

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RE: request time out on ISA network - 16.Feb.2008 8:56:34 PM

royh

Posts: 284
Joined: 23.Feb.2007
From: Lebanon
Status: offline

Looks like its a routing issue...

quote:

my second question is..is there any option in ISA2004 to stop broadcast?or limit user/ip to make particular connections with isa2004..

Is there any allow access rule from internal network1 to local host?

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Roy Haddad,M.Sc
CCNA, MCSE 2003 Messaging & Security,C|EH

(in reply to z_haseeb)

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RE: request time out on ISA network - 17.Feb.2008 12:23:10 PM

z_haseeb

Posts: 181
Joined: 15.Jun.2005
From: Karachi,Pakistan
Status: offline

I have resolved it friend but thanks for reply

basically that was SYN attack thats Y network was chocking.....I used below microsoft recommandation

http://technet2.microsoft.com/windowsserver/en/library/62b7213b-a24a-4da4-983f-9ced415ff5901033.mspx?mfr=true and the below related links

SynAttackProtect

�
TcpMaxHalfOpen

thanks

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Interest ISA Server2004

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RE: request time out on ISA network - 17.Feb.2008 12:54:30 PM