[pptp-server] can connect, but no ping

[Jean-Serge Gagnon]

Denny Schierz wrote:
> Hello pptp-server List,
>
>   i have setting up a, a pptpd Server on Linux Kernel 2.2.19. I can
>   connecting from a Win2k PC but, i can't communicate with my network
>   behind the firewall Host. The Ping tells me, that:
>
> ing: sendto: Operation not permitted
> ping: wrote 192.168.100.40 64 chars, ret=-1
>
> I've many ipchains rules (created by the Webmin Module Firewall
> IPCHAINS). My Firewall has the IP 192.168.100.253
> (pptpd server 192.168.100.252) and the Client becomes the IP
> 192.168.100.40.
>
> My Internet Interface ist eth0 with 195.145.9.30 and the local Net
> is eth1 192.168.100.0
>
> I'm think, that this rules are the Problem:
>
> #Do not accept packets from private class C on ext NIC
> /sbin/ipchains -A input -i eth0 -s 192.168.0.0/16 -j DENY
> /sbin/ipchains -A input -i eth0 -d 192.168.0.0/16 -j DENY
> /sbin/ipchains -A output -i eth0 -s 192.168.0.0/16 -j DENY
> /sbin/ipchains -A output -i eth0 -d 192.168.0.0/16 -j DENY
>
> can somebody help me

Sounds like a pppd setup problem I had. I had a problem with the
defaultroute option. Something to do with pppd trying to set the default
route to the PC and not being allowed to do it since there is already one
(usually your ISP's connection). Trying adding "nodefaultroute" to your ppp
options.

--- Talking Linux install: Newlix OfficeServer ----
Jean-Serge Gagnon    <jsg at gaaj.qc.ca>
GaaJ Services        http://www.gaaj.qc.ca
(819) 568-7883       fax: (819) 243-4824