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We have a single Windows SBS2003 running exchange, which when recently restarted, could not ping / access any other IP addresses on the network. On looking at the event log, I noticed that an error reported that IPsec had gone into block mode, and on researching this, established that we should dissable the IPsec service and reboot the server.<br />
<br />
This we did, and sure enough it resolved the issue.<br />
<br />
My question is, why would this suddenly happen, and do we need IPsec running on the server.<br />
<br />
We use OWA, RDP, and SMTP which are all currently working fine.<br />
<br />
Any advice would be welcomed.<br />
<br />
Many thanks.
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We have a single Windows SBS2003 running exchange, which when recently restarted, could not ping / access any other IP addresses on the network. On looking at the event log, I noticed that an error reported that IPsec had gone into block mode, and on researching this, established that we should dissable the IPsec service and reboot the server.

This we did, and sure enough it resolved the issue.

My question is, why would this suddenly happen, and do we need IPsec running on the server.

We use OWA, RDP, and SMTP which are all currently working fine.

Any advice would be welcomed.

Many thanks.

IPsec has gone into block mode

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).

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.