D
David Davidson
I'm just wondering if anybody's seen a problem with their web server recently
that's similar to the following: about two weeks ago some clients on our
intranet started experiencing lost sessions - they would be automatically
redirected back to our default page when doing a normal "postback" (like
clicking a Save or a Search button).
After researching the logs, we saw HTTP POST lines with missing SESSIONID
entries. In fact, the HTTP POSTs have no Form or Cookie collections. I
haven't done it yet, but I'm planning on using Fiddler to verify the client
is actually sending them. It happens only with clients on our intranet (Win
XP Pro boxes), only with certain pages (seem to have very large ViewStates
and, thus, large Forms collections), and intermittently with no discernable
pattern. Sometimes the pages work and have all the necessary info included
with the HTTP POST, sometimes the info is missing and a new session is
started.
The web server is in a DMZ behind a Symantec Raptor firewall and has a
reverse-proxy server as well (which is not controlled by us so I don't have
much info on it at the moment).
I am leaning towards the possibility of update MS05-054 causing the problem,
but I'm still troubleshooting. The problem may be the client or the reverse
proxy server - the web server is definitely not receiving the Forms and
Cookie collections on some HTTP POSTs.
Has anybody out there seen something similar?
- Dave
that's similar to the following: about two weeks ago some clients on our
intranet started experiencing lost sessions - they would be automatically
redirected back to our default page when doing a normal "postback" (like
clicking a Save or a Search button).
After researching the logs, we saw HTTP POST lines with missing SESSIONID
entries. In fact, the HTTP POSTs have no Form or Cookie collections. I
haven't done it yet, but I'm planning on using Fiddler to verify the client
is actually sending them. It happens only with clients on our intranet (Win
XP Pro boxes), only with certain pages (seem to have very large ViewStates
and, thus, large Forms collections), and intermittently with no discernable
pattern. Sometimes the pages work and have all the necessary info included
with the HTTP POST, sometimes the info is missing and a new session is
started.
The web server is in a DMZ behind a Symantec Raptor firewall and has a
reverse-proxy server as well (which is not controlled by us so I don't have
much info on it at the moment).
I am leaning towards the possibility of update MS05-054 causing the problem,
but I'm still troubleshooting. The problem may be the client or the reverse
proxy server - the web server is definitely not receiving the Forms and
Cookie collections on some HTTP POSTs.
Has anybody out there seen something similar?
- Dave