Trouble with IPsec VPN and server publishing

[ilceres]

Greetings.

I'm an IT administrator from Italy.
I have a Win 2003 ISA 2004 server in my company, and it worked very well for all server publishing (SMTP,HTTP,FTP,OWA,RDP).

I just made an IPsec site to site VPN with our Poland site, and here it's the scenario:

WIN2003_ISA2004-->CISCO1841<--INTERNET-->THIRDPARTROUTER-->WIN2003_ISA2004

Cisco 1841 is NAT trasparency and the other router NAT on port 500 and 4500 UDP

Now come the trouble: the VPN work well only from one side (WIN2000 to WIN2003), and now I CAN'T CONNECT TO MY WIN2003 ISA2004 SERVER EXTERNAL IP ADDRESS!!!!
ALL SERVICES PUBLISHED ARE DOWN.

I'm going puzzled... how can be happened??

 

[coco10]

hi,

check this

http://www.isaserver.org/articles/2004vpnserver.html

and

http://www.isaserver.org/articles/2004sitetositecpv2.html

I think may be the router is the trouble.
try with transversal NAT or ugrade de firware.

coco10

 

[coco10]

one more

http://www.techtutorials.info/isavpn.html

coco10

 

[ilceres]

Thank you very much.

I check all configuration and it's all ok.
Today all work good.. strange thing! I think it's an hw trouble with the WAN NIC interface.

Actually I'm use a simple Realtek 8139, now I'm waiting for a 3Com 3C905CX-TX-M that is better

My server is a IBM Netfinity 5600 - double PIII 800 Mhz with 1024MB SDRAM - Someone know any HW incompatibility with £com nic's?