Date: 16 May 2002 04:02:56 -0600 From: Thomas Foster <thomas.foster@section6.net> To: freebsd-questions@freebsd.org Subject: MPD and routing Message-ID: <1021543376.1642.178.camel@schism.section6.lan>
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OK.. I've been trying to hold off posting for days, but I am now pulling my hair out. I've searched all over the archives and tried various configurations.. but now I'll simply give the layout. Ive got a FreeBSD stable IPF machine with one external public address of xxx.xxx.xxx.xxx on a cable modem and one internal interface of 10.0.0.1 / mask 255.255.255.0 on a private LAN. I have got another FreeBSD machine (single NIC) running PPTP services with MPD, sitting on the private network side with an address of 10.0.0.2 / netmask 255.255.255.0. TCP port 1723 and protocol 47 (GRE) are opened and being properly redirected via IPF/IPNAT to the appropriate interface on the computer running MPD. When a client from the outside network requests a connection to the PPTP server, they are connected, authenticated, and logged in. After authentication and connection they are unable to reach any other host on the network, no ping, no trace, nothing. I attempted to ping the connected host from another machine (10.0.0.5) on the internal network.. nothing. The client is only able to reach the interface of he MPD server (10.0.0.2) and vice versa.. the MPD server can ping the connected client (10.0.0.100) Upon closer inspection of the IP configuration of the clients I notice that they are assigned the appropriate address specified in the bundle but their netmask and gateway information are not what I defined for the bundle. I've also found that the network configurations vary upon the client attempting the connections. An example would be: Windows 98/ME Windows 2000 address: 10.0.0.100 address: 10.0.0.100 netmask: 255.0.0.0 netmask: 255.255.255.255 gateway: 10.0.0.100 gateway: 10.0.0.100 "This is strange", I thought. "Is this normal behavior?" So I scoured Deja and archived lists looking for answers. I have found many issues revolving around enabling ARP cache and running MPD/PPTP on a dual homed system that acts as a gateway. I originally enable proxy-arp in my mpd.conf file. I checked the ARP tables of other machines on the network and did see the ARP entry for the client logged in via PPTP (10.0.0.100), but still could not ping the host. I have tried to "set iface route 10.0.0.1/24" I have adjusted the "set ipcp ranges 10.0.0.2/23 10.0.0.100/32" to reflect /24, and then back again to /32. I added another interface with an address of 10.0.0.20/24 and used it in the ipcp ranges definition while still having the server listen on 10.0.0.2 as defined in the mpd.links I've even attempted to pass a 255.255.255.255 range so that the client might obtain an address from another machine (10.0.0.42) running DHCPD. I have read and spoke to other people that are successfully running MPD as a PPTP server. I have even borrowed conf and links files from them, but no success. There has to be something very small and stupid (KISS principle)I am missing, but I am afraid it escapes me. Hopefully this post is informative enough without being as bloated as Microsoft code. Any input would be greatly appreciated. Thomas Foster section6 networks To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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