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vpn through linux firewall to nt 4sp6a

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5 replies

by cwsc

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I am trying with no success to vpn through a linux firewall to my nt server. I believe I have the rules setup correctly but am unable to finish verifying username and password. fyi-my connection to the internet is a cable modem. Firewall also setupas dhcp server and client. Micorsoft told me I needed the lastest sp6a ( now installed), didn't seem to help me.

5 replies

by gregory pleau

I am using a PPTP Win Client via Linux Gateway to NT40SP6a with the following:

- Win 98 Client
- PoPToP PPTP Server (http://www.moretonbay.com/vpn/pptp.html)
- PPPd 2.4.0
- Linux Kernel 2.4.1

I am NOT using IPCHAINS.
The user actually authenticates to pppd vi the pptp daemon. You will want to visit the ppp HOWTO at www.linuxdocs.org as well.

Some pitfalls I hit:

-The /etc/ppp/options file should have ms-wins=(nt server ip - local one!) to find the Domain controller

-Make sure the Linux box can see the NT Box

-MTU setting should not be over 1412 on DSL connections

If the tunnel is terminating at the NT box (not the linux) then you will have to use ip_masq_pptp.o to accomplish that.

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