HTTPS Server - Failed Connection Attempt (Full Version)

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markeboyle -> HTTPS Server - Failed Connection Attempt (30.Sep.2004 6:07:00 AM)

I have web server I publish SSL on and it works fine 90% of the time. When traffic gets busy I start seeing this "Failed Connection Attempt" in the logging tab.

Any ideas on how to debug what is causing these failures? I've looked in the web and firewall serversĘ event logs (application and system) but nothing in there.

Both servers have no significant load so I'm not sure why this would be happening.

I'm running ISA 2004 on Windows 2003 Server.

I don't think itĘs relevant but I did the port from ISA 2000 so there is this silly error message in the Alerts for all my published servers that read as follows:

"Server publishing rule [ISA70: SSL - www.mydomain.com] failed because there was no valid network listener. For requests to reach the published server there must be a network relationship between the selected listener networks and the published server. Location 325.871.4.0.2161.50. For more information about this event, see ISA Server Help. The failure is due to error: 0x8007000d "

Any guidance on debugging this is appreciated.

-Mark



tshinder -> RE: HTTPS Server - Failed Connection Attempt (1.Oct.2004 2:07:00 AM)

Hi Mark,

Are there actually failed connection attempts, or are these bogus log entries?

Thanks!
Tom



markeboyle -> RE: HTTPS Server - Failed Connection Attempt (1.Oct.2004 5:55:00 AM)

I'm really not sure how to tell.

The only thing I hear about is that some of the end users, during these times, experience very slow response times.

Maybe their browsers are retrying and eventually getting a connection? Not sure how to read this type of failure as it relates to https.

Thanks again,
Mark



markeboyle -> RE: HTTPS Server - Failed Connection Attempt (1.Oct.2004 7:17:00 AM)

MYSTERY SOLVED!

Turns out that the firewall has a connection limit of 20 per client by default and "Limit the number of connections" is on by default too!

Since the users experiencing this slow down were coming in over a proxy server from their location ISA was dropping most of their requests and they ran extemely slowly while other location were fine.

Thanks,
Mark



lorenzotaylor -> RE: HTTPS Server - Failed Connection Attempt (15.Jan.2007 10:01:20 AM)

Just saw this post.  Would the connection limits affect the connections to an upstream squid?  I see quite a lot of failed connections and wonder if I need to set a custom limit for the Squid......



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