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PPTP with dhcp only for clients

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http://unix.stackexchange.com – I have a local network at home with a router and a small server. The router manages the local network (DHCP, etc) but does not support PPTP. On the server (Ubuntu 12.04) I set up pptpd and this is working fine ... except that the dhcp3 server started by pptpd is now conflicting with the router. My other systems get answers from two DHCP servers - and not all of them are able to handle it properly (namely my Android tablet). I have no idea where to start fixing this (except using static IP addresses for my VPN). Any ideas would be appreciated. ()

Danial's picture
Submitted by Danial on 09/07/2012

Stories similar to PPTP with dhcp only for clients

I am trying to setup a PPTP VPN server on my ubuntu minimal server 12.04 LTS hosted by linode

There are many instructions on doing this online, and I have looked through nearly all of them. I was able to set this up successfully on my netbook on my home network.

On my VPS server, I only have 1 available public IP address and 1 private IP address.

So I will start with the fact I wasted the whole day trying to figure that out with no results...

I have a small local network behind a NAT router.

I run a small business network and the last couple of days I have been setting up some equipment to add VPN capabilities to our network. I've got the following set up:

Windows 2008 R2 with RRAS - 172.22.200.50 Cisco RV082 router - 172.22.100.1 / 172.22.200.1

The Cisco router only support DHCP on a single class C network; 172.22.100.0/24.

I have a Win2k8 R2 server and Win 7 clients. The Server has DHCP and DNS running on it. So far so good everything works fine.

Now the problem comes when I also enable DHCP on the router so that clients can get an Internet connection when the Server is down.

I have been running a file server on Ubuntu for a couple of years now. Recently I had to take the network down. When I brought it back up, my server lost its ip address from the router.

I can't remember how to put it back in the dhcp mode. I know that running a server in the dhcp mode isn't optimal, but my router won't allow me to assign static ip addresses.

We just added a Cisco SPA122 ATA with Router to our network, it will be used for our paging system (an amplifier/speakers). We are having a hard time getting it work. Well until we found out the ip that the Cisco SPA was using was also using the same ip as one of our servers.

Now, is this something that can be fixed via our DHCP server? Or is this a problem with the Cisco SPA?

Static IP on server or router? 9 weeks 11 hours ago

I am trying to learn about networking, but I have a question that I can't find a explanatory answer. Basically, I am trying to set-up a server for my local network.

I know, that I have to change the setting from DHCP to STATIC, but I don't know if that should be done on my router or on my server? Or maybe both?

Also, what is the difference between these two?

Thanks for your answers, you rock!

Long uptime to everyone!

OS FreeBSD 9.0-RELEASE, pptpd-1.3.4.

Network:

em0 1.2.3.4 - external interface and ip tun0 10.18.1.0/24 - network for openvpn clients tun1 10.18.2.0/24 - network for pptp clients

Configuration.

/etc/ppp.conf:

default: set timeout 0 set log Phase Chat LCP IPCP CCP TUN Command Connect disable vjcomp deflate pred1

pptp: set device localhost:pptp set ifaddr 10.18.

I'm not sure if I am going to describe this properly. I have a OSX Lion server(don't ask me why this was requested) linked to a domain (for examples sake server.domain.net).

Outside access is working as intended. However for local clients access to the domain causes errors as the domain points to the same network.