Are you sure those errors were not there before Faisal? This is a common issue with networks using VPN and even though they are listed as errors most likely they are false spoof alerts (unless your network is horribly misconfigured) I would need more information such as network configuration and full error messages, But in the mean time check out this article here: <a href="http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.isa&tid=789eb27c-8e86-4f8e-a32a-05143803378b&cat=&lang=&cr=&sloc=&p=1">http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.isa&tid=789eb27c-8e86-4f8e-a32a-05143803378b&cat=&lang=&cr=&sloc=&p=1</a> If this is the same situation as you are having it is safe to suppress the spoof messages. If not reply back with your network setup and I will continue to help you troubleshoot..

Are you sure those errors were not there before Faisal? This is a common issue with networks using VPN and even though they are listed as errors most likely they are false spoof alerts (unless your network is horribly misconfigured) I would need more information such as network configuration and full error messages, But in the mean time check out this article here: <a href="http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.isa&tid=789eb27c-8e86-4f8e-a32a-05143803378b&cat=&lang=&cr=&sloc=&p=1">http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.isa&tid=789eb27c-8e86-4f8e-a32a-05143803378b&cat=&lang=&cr=&sloc=&p=1</a> If this is the same situation as you are having it is safe to suppress the spoof messages. If not reply back with your network setup and I will continue to help you troubleshoot..