I am not sure of the LT2P or PPTP but you can find the info on my secureremote here:
http://www.checkpoint.com/products/v..._features.html
http://www.checkpoint.com/products/d..._datasheet.pdf
There is no firewall and not external router, all i would say is that if it was a firewall or vpn client issue, why would it work on BT Adsl and workplace??
Thanks
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if i can find out the modem's ip address, i could check the settings with the html interface