this is a very common question on another list im on the poptop list.
I think this may be helpful
ipchains -A input -i $R_D -p 47 -s 0/0 -d $RED/32 -j ACCEPT
ipchains -A input -i $R_D -p tcp -s 0/0 -d $RED/32 1723 -j ACCEPT
Note that pptp uses GRE protocol number 47 in the above config. The above
lines aren't cut/pastable. You need to modify them so they fityour config.
Checking what each bit means is helpful. There is a VPN module for pptp as
well.
http://www.wolfenet.com/~jhardin/ip_masq_vpn.html
Yer so if that ain't helpful keep diggin :)
dave
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> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Peter Rundle
> Sent: Friday, 2 June 2000 10:21 AM
> To: [EMAIL PROTECTED]
> Subject: [SLUG] PPTP via IPMASQ
>
>
>
> Has anyone had any success getting PPTP (point to point
> tunneling protocol) to work over IPMASQ? or is this one
> of *those* protocols that IPMasq can't do?
>
> I've got a Linux box acting as the dial-out gateway for a
> small Lan. On the lan there are doze boxes that browse
> the net, use https (ssl) etc etc no problem. However one
> of them has pptp on it and tries to connect to a remote
> site. I see outgoing packets from the doze box and what
> looks like outgoing and incoming packets on the Linux
> gateway but no incoming packets get back to the doze box.
> The doze box can ping the remote pptp server so the
> end-to-end network is ok for icmp and ip, and I've cut
> the ipchains setup down to the minimum for testing, I.E
>
> ipchains -A forward -s 192.168.10.0/24 -j MASQ
>
> I moved the modem to the doze box to check the pptp setup
> and it connects no problem when the modem is directly
> connected to it.
>
> Any ideas?
>
> Thanks
>
> Pete.
>
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