Clients using RRAS for NAT can only get to *SOME* websites - Windows server 2008

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i'm running server 2008 (sp2), i've got dhcp , dns roles set appropriatly, server handing out ips , dealing dns requests machines on network apparantly correctly.

i've run through wizard set rras nat, appropriately setting internal , external interfaces, internal interface not have gateway specified, have static ip address.  internet interface recieves it's ip address on dhcp isp.

clients seem able resolve names correctly using dns server, unable connect websites, connection times out, example can connect google, can't connect site (http://social.technet.microsoft.com/), can't connect windows live messenger or xfire.

have tried disabling ipv6 incase it's trying send data onto ipv6 internet (or lack of), disabled windows firewall - because could, , tried other things.

suggestions @ or try?
alex

well that's strange, appears mtu outbound connection being set high , breaking packets!


Windows Server  >  Network Infrastructure Servers



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