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01.21.2008 at 03:54PM PST, ID: 23099793
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7.4

Slow https sites. Protocol SSL Tunnel - "Failed Connection Attempt"

Asked by Mr_Flibble69 in MS Forefront-ISA, Secure Socket Layer (SSL) & HTTPS, Enterprise Firewalls

Tags: , , ,

My company is having lots of problems connecting to https sites. Lots of failed connection errors, resulting in really slow SSL sessions.

In the ISA 2004 logs I can see error msgs with :-
995 The I/O operation has been aborted because of either a thread exit or an application request.

I've tried increasing the connection limits to 200, installing sp3, checking dns settings, and reset the isa cache

A sample log is below.

Original Client IP      Client Agent      Authenticated Client      Service      Server Name      Referring Server      Destination Host Name      Transport      MIME Type      Object Source      Source Proxy      Destination Proxy      Bidirectional      Client Host Name      Filter Information      Network Interface      Raw IP Header      Raw Payload      Source Port      Processing Time      Bytes Sent      Bytes Received      Result Code      HTTP Status Code      Cache Information      Error Information      Log Record Type      Log Time      Destination IP      Destination Port      Protocol      Action      Rule      Client IP      Client Username      Source Network      Destination Network      HTTP Method      URL
0.0.0.0      Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 1.0.3705; .NET CLR 2.0.50727)      No      Proxy      ISA_SERVER            s12.projectcentre.net      TCP            Internet      -      -            -      Req ID: 0572cb53       -      -      -      0      0      895      777            995 The I/O operation has been aborted because of either a thread exit or an application request.       0x0      0x8      Web Proxy Filter      22/01/2008 10:15      202.51.175.12      443      SSL-tunnel      Failed Connection Attempt      Web Outbound      192.168.10.30      anonymous      Internal      External            s12.projectcentre.net:443


The ISA box's roles are firewall//gateway  whilst the web proxy (192.168.10.30) has Webmarshal installed and another server acts as the dns server

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[+][-]01.22.2008 at 10:19AM PST, ID: 20716602

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About this solution

Zones: MS Forefront-ISA, Secure Socket Layer (SSL) & HTTPS, Enterprise Firewalls
Tags: Microsoft, Isa, 2004 SP3, 995 The I/O operation has been aborted because of either a thread exit or an application request.
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Solution Provided By: GLComputing
Participating Experts: 1
Solution Grade: B
 
 
[+][-]02.03.2008 at 01:49PM PST, ID: 20810468

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