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ISA - Having VPN Problems

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8 replies

by ped

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my isa is connected to my domain and the internet with 2 nic cards. no DHCP or DNS on domain.

i configured the domain nic with no gateway and the internet nic with ip, gateway, and dns.

if i add my domain gateway then my vpn works but the local internet stop brownsing.

if remove my domain gateway from my network nic the the internet works and the vpn stops.

help
peter

8 replies

by cg it

Which O/S are you using? [I assume that ISA stands for Internet Security & Acceleration Server.]

by ped

os = Windows2000 Server and Internet Security & Acceleration Server.

peter

by r. a. caluste

all clients connected to the isa server acts as secureNAT clients. therefore, all requests are routed through your isa server virtual private connection when you add the domain gateway and therefore no internet access. if you remove the domain gateway, your vpn configuration will be incomplete, however your internet will work since requests are not routed in your internal network.

configure routing and remote access to add your demand-dial interface in your General IP Routing.

by cg it

To use VPN with Windows 2000 server, you have to have RRAS [routing and remote access service] running. To configure RRAS, click start, settings, control panel, administrative tools, RAS. Right click on your server. A wizard will pop up which will guide you through the steps of setting up your RRAS service.

note: L2TP requires a security certificate for connections on those ports. If you don't have one, traffic will not be allowed on L2TP.

You also must make up a rule for remote access on your ISA server. By default, all inbound and practically all outbound traffic is denied.

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