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Repeated HTTP POSTS through ISA2004 EE - 22.Nov.2006 11:27:31 AM

evgesha_63

Posts: 6
Joined: 22.Apr.2004
Status: offline

Hi,
I have a long lasting issue (since upgrade from ISA2000 EE).
When I post a form to a web site (e.g to this forum or to any web based mail), it sometimes repeats it several times - 2-3 emails or forum posts. this does not heppen when anonymous access is enabled, but rather constant when the integrated autentication is used. There are some details;
- 2 ISA2004 EE in NLB (with or without NLB doesn't metter)
- Web Proxy Clients with manual proxy definitions
- No "Require all users to authenticate" checkbox selected
- Access rule with AD integrated authentication for approved users
- The servers were optimized for a high-load, including PMTU and increased authentication sessions to DC (the issue existed before this tuning was done).
- Direct connection to internet (no web chaining)
- Different NICS toward Web Proxy Clients and internet
- No CARP

I woul appreciate any help or even hint on possible direction of problem location.

Sincerely,

Evgeny Popov
Security System Engineer.

Post #: 1

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RE: Repeated HTTP POSTS through ISA2004 EE - 29.Nov.2006 10:18:05 PM

NCSCS

Posts: 1
Joined: 29.Nov.2006
Status: offline

Greetings ...

We run 2 ISA Servers (2004 St. Ed) internally for Proxy and Surf Control - the ISA servers are behind a Cisco CSS content switch. Users have the VIP set on their browsers set via Group Policy. Recently, we are having issues where some HTTP POSTS are sent in triplicate from the ISA server. This results in triple emails, triple orders, etc. Very annoying issue.

We have tested this thoroughly and have eliminated everything BUT the ISA servers.

Microsoft PSS has no clue and has never heard of this issue. After discovering this forum and noticing that others are having similar issues, I am going to engage PSS again to see if I can escalate the problem again.

I will post my finding on this forum.

If you are also having this issue, please add to this forum and I will inform MS that others are having this issue.

Thanks!

Steve

(in reply to evgesha_63)

Post #: 2

RE: Repeated HTTP POSTS through ISA2004 EE - 30.Nov.2006 8:42:34 AM

elmajdal

Posts: 5071
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline

i've seen such issue before, here is one that i was trying to help with : http://forums.isaserver.org/m_2002026861/mpage_1/key_three%2cposts/tm.htm#2002027154

u need more ? this is a fresh one : http://forums.isaserver.org/m_2002033316/mpage_1/key_posts/tm.htm#2002033316

will wait for MS PSS response, i would like to know whats the reason for such behavior, if i am not mistaken , this mainly occur with ISA EE .

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to NCSCS)

Post #: 3