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do you have 2 nics on your isa server and do they both have default gateways? seems like i had this problem once before and that had something do do with it. 
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do you have 2 nics on your isa server and do they both have default gateways? seems like i had this problem once before and that had something do do with it.

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verify your network priority,<br />
Regards,<br />
Umang
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verify your network priority,
Regards,
Umang

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also check firewall rule for internal,<br />
regards,<br />
Umang
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also check firewall rule for internal,
regards,
Umang

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I have ISA 2004 running on SBS 2003. &nbsp;Seemingly out of nowhere, any website I try to load on any of the clients or the server itself - I get &quot;Error Code: 502 Proxy Error. The requested socket is not connected. (10057)&quot;. &nbsp;It is a standard ISA error page in internet explorer. &nbsp;I have tried everything I could think of, including uninstalling and reinstalling ISA twice. &nbsp;Pages loaded fine the entire time ISA was not installed. &nbsp;Sometimes it will start working for a couple minutes, or as much as 15-20 minutes, but it always comes back to the error. &nbsp;If I reboot the server it will usually work for a couple minutes before I start getting the error again.<br />
<br />
Does anyone know what this error means? &nbsp;I can find NOTHING on the internet about it. &nbsp;Any suggestions on something else I can try?
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I have ISA 2004 running on SBS 2003.  Seemingly out of nowhere, any website I try to load on any of the clients or the server itself - I get "Error Code: 502 Proxy Error. The requested socket is not connected. (10057)".  It is a standard ISA error page in internet explorer.  I have tried everything I could think of, including uninstalling and reinstalling ISA twice.  Pages loaded fine the entire time ISA was not installed.  Sometimes it will start working for a couple minutes, or as much as 15-20 minutes, but it always comes back to the error.  If I reboot the server it will usually work for a couple minutes before I start getting the error again.

Does anyone know what this error means?  I can find NOTHING on the internet about it.  Any suggestions on something else I can try?

ISA Error Code: 502 Proxy Error. The requested socket is not connected.

Microsoft Forefront, formerly known as Internet Security and Acceleration Server (ISA Server), is a network router, firewall, antivirus program, VPN server and web cache that runs on Windows servers. It includes identity management and protection systems, and discontinued systems for threat management and network protection, along with protection for Sharepoint and Exchange. The scope of discussions includes forward and reverse proxy, application and service publishing, virtual private networks (VPNs), outbound access rules, SSL certificates and network routing within either a single node or an highly-available array pairing.

Microsoft Forefront ISA Server

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).