The Point-to-Point Tunneling Protocol (PPTP) is a method for implementing virtual private networks. PPTP uses a control channel over TCP and a GRE tunnel operating to encapsulate PPP packets.

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Allow PPTPD VPN clients to communicate with one another

I have an Ubuntu server on the net, I setup PPTPD on said server because I was experiencing a problem I VPN might solve. At my home address I have my Desktop, and I would like to access its resources ...
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16 views

Allow PPTPD Clients to Communicate [migrated]

Ive set up a PPTPD VPN server on an Ubuntu 12.04 Machine. I have 3 machines connected to it, 2 of which are on the same network and one that is on a separate network. All 3 are on the VPN, and can ...
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1answer
14 views

Is it possible to run pptpd with certificates and is it recommend?

To secure my internet experience, I want to set up a vpn on a on-demand way using amazon AWS EC2. My primary client is running with windows 7 professional. (Maybe further clients will be my android ...
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24 views

Connection errors with pptp vpn GRE and LCP errors

I am trying to setup a pptp link to my server just to get things out the way up top I know it's not that secure but for my purposes it works quite well. Bellow is the log I have when I try to connect ...
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0answers
57 views

PPTPD server on ubuntu 12.04.1 LTS not giving default gateway or forwarding windows client's packets

I recently bought a VPS, and wanted to set up a VPN with IP forwarding on it, both for resource sharing, and to DDoS protect a company’s windows VPS. I am not very experienced with networking on ...
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1answer
19 views

Create a pptp tunnel through a exisiting domain [closed]

I want to create a tunnel (preferably pptp) via a website that I created I am renting a domain from an ISP with a linux os, is it possible to create it?
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111 views

Window CLient User Connect PPTP VPN FreeRadius verify username from MySQL not chap-secrets file

FreeRadius are working proper Sending Access-Request of id 223 to 110.4.43.172 port 1812 User-Name = "test" User-Password = "mypassword" NAS-IP-Address = 127.0.0.1 ...
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1answer
54 views

VPN client to client port forwarding

I have an EC2 Amazon instance running a vpn server with 192.168.240.1-9 ip range. I can connect my Macbook to this VPN (using system pref.) and a Raspberry Pi, using this command line: sudo ...
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1answer
54 views

PPTPD not work when connecting from Internet

I have VPN server on Debian stable. People in LAN (gray network) use this server for access to internet (WAN). But I also want to use this VPN server as something like "proxy" (connect from internet, ...
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52 views

PPtPd server gives error in ppp when client attempts to connect

I'm trying to setup a VPN server on Mint Debian edition. I followed the instructions here, where I changed the interface to be wlan0 and the ip address for the server and the range. The pptpd seems ...
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2answers
163 views

Remote IP for pptpd server

I'm trying to set up a VPN server with pptpd, and I'm having trouble determining what range of IP addresses I should pass to it's remoteip configuration option. I can connect just fine to the VPN, but ...
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1answer
100 views

Opening ports for VPN clients

I am trying to open specific ports for users so that they can use programs such as RDP. I have searched all over the internet, and have yet to find an answer to this question. I have tried every ...
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0answers
40 views

PPTP custom route connected clients

I got this PPTP box with many users. My box is configured to have remoteip 10.8.0.2-254 for my users. Each time a new client connects it gets 10.8.0.2 which is not good for me. I need a way of giving ...
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1answer
244 views

Restricting nginx website connection to VPN Users on the same server

My main aim is the following: Install a VPN server on a server, and a website on that server should be accessible only to users that are using the VPN on that same server. First, the two server case ...
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99 views

vpn set up but client cannot connect to DNS server

I have three machines in the local network: A.Android phone B.PC C.pptpd running to Ubuntu in VirtualBox in the same PC. (with bridged networking) There is router which can see all these 3. I use ...
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91 views

How to allow multiple remote IPs in PPTP?

just set PPTP on my Centos machine, and works fine so far.. But since on server I have 255 IPs, is it possible to create multiple VPN connections, where each connection bind to specified IP? For ...
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1answer
56 views

pptpd mostly works, but strange internet/dns behavior

I'm running Centos 6.4, and I got pptpd working, for the most part. I am connecting from a Windows 7 machine, and once connected I can access all the intranet sites as well as sites that are already ...
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79 views

PPTPD on VPS with one ip?

Ok, i've been trying for quite some time to get PPTPD working on my VPS and it's not working. Jun 16 21:08:34 cust-5488-520 pptpd[962]: CTRL: Client 83.127.117.40 control connection started Jun 16 ...
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1answer
167 views

More than 254 client IPs in PPTP (PPTPD)

I'm trying to setup my PPTP to allow more than 255 client connections. I have added the connections param in pptpd.conf to allow the connections but I do not know how to set the remoteip ...
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1answer
124 views

PPTP server remote IP assignment causing problems

Our PPTP vpn server (Ubuntu) is working as it's supposed to, but because of the way it assigns remote IP addresses it's causing some problems with our other software. Example: machine A joins the VPN ...
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1answer
114 views

Ensure PPTP / OpenVPN clients cannot interact with each other?

How can one ensure that PPTP / OpenVPN will not allow clients connected to the tunnels to be able to interact with each others? I never enabled bridging and enabled the following in iptables ...
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1answer
259 views

How can i create a point to point connection?

We have a measurement campaign in a field, until now we had the following network structure The distance was 400m between the two points so the most easy solution was to use a Wifi pont to point ...
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1answer
104 views

Is it insecure to use the following iptable rule for NAT?

I want to setup a VPN server for personal use, so I follow the blog article [1], and it work like a charm. The only thing I am wondering is if the iptable's rule secure, e.g. iptables -t nat -A ...
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1answer
233 views

How to disconnect pptp client?

How to disconnect pptp client connected to Cent OS 6.2 server from the server side ? ifdown ppp0 doesn't work.
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1answer
135 views

pptpd: log of unsuccessful authentication

I am using pptpd on Debian 6. I know that last shows the list of connections as well as the source IP. I am looking for the log of unsuccessful authentication, or any form of alert/ban for a source ...
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1answer
68 views

How to forward gateway requests for a subnet through another connection under Linux

I have a Debian machine acting as a DHCP server/NAT, connected via PPTP to another machine,connected to a subnet 10.0.0.0. How do I configure it so requests from clients on this machine for the ...
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137 views

Cannot resolve domain over VPN

I have setup a VPN server at UK and connected it from my PC. The problem is my PC cannot resolve some domains like twimg.com paypal.com etc. Does these servers denies VPN servers or especially my IP ...
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2answers
767 views

Routing problems to certain domains with PPTPD VPN setup

We've been struggling with some kind of network/routing issue with a PPTPD based VPN where the clients can't access certain internet domains/ips through the VPN. As an example, the user can browse ...
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1answer
165 views

v6tov4 in Linux?

I have a server which runs Debian system. I use pptpd for VPN services. But pptpd can only response to IPv4 traffic and ignore IPv6 traffic. Is it possible to establish VPN connection using IPv6?(That ...
2
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0answers
422 views

Can't ping other machines at Linux VPN PPTP server's local lan from outside

Before anything else, hello guys, this is the first time I ask for something here so I hope someone can give me a hand, please look at the following network diagram: ...
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2answers
699 views

Manually add route to VPN

Hello server enthusiasts, I have a VPN (pptpd running on Ubuntu 10.04) that I am trying to connect to with a client (Win7). I can successfully connect to the VPN. Once connected to the VPN, I can ...
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3k views

PPTP VPN Not Working - Peer failed CHAP authentication, PTY read or GRE write failed

Brand-new install of CentOS 6.3. Followed this guide: http://www.members.optushome.com.au/~wskwok/poptop_ads_howto_1.htm And I got PPTPd running [v1.3.4]. I got the VPN to authenticate users against ...
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1answer
1k views

problems connecting to VPN server on Raspberry Pi (Debian) [closed]

I have installed pptpd on my Raspberry Pi box (it's Debian-based for those who don't know), it's running but not working properly - I can't connect. here's interesting log - me trying to connect: ...
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245 views

Networking between openvpn and pptp clients

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 ...
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1answer
632 views

PPTP linux server - Linux clients ok - Windows client can't connect to some web servers

I have one mysterious problem with our VPN office server. I have installed PPTP server on Debin 6 Squeeze and enabled forwardind, because I need to connect to some servers with our office IP address. ...
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1answer
127 views

Restrict VPN Clients to VPN Server

I've setup a VPN server using Debians pptpd. This all works, but I want to restrict incoming connections so they can only access ports on the VPN server and not get access to other machines on the VPN ...
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451 views

What IPTables settings are needed to allow multiple clients to tunnel through a VPN

I'm trying to lock down my VPS but still allow PPTP-VPN access and am running into a snag. Hoping someone may be able to offer input. Basically trying to figure out what part of my iptables is ...
4
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3answers
1k views

pptpd not working externally on Ubuntu Server 11.10

I am trying to set up a pptpd vpn on our newly installed Ubuntu 11.10 64 bit server, but am not having success having a client connect via an iPhone to the VPN. Note that no clients have been able to ...
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2answers
671 views

Fedora 15: em1 recently dissapeared and hostapd no longer serves internet to wirelessly connected devices

I have a laptop running hostapd, phpd, and mysql. This laptop uses an Ethernet connection to connect to the internet and acts as a wireless access point for my workplace's wifi devices. After ...
3
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1answer
905 views

Iptables: Selective PPTP VPN routing

I've been able to set up TomatoUSB firmware with Ipredator via PPTP, the configuration is as follows: However, I don't want to use Ipredator PPTP VPN for every machine on my network, how to only ...
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2answers
2k views

PPTPD Couldn't open the /dev/ppp device: Permission denied

I cannot connect to my pptpd server, because it fails to send LCP: Config-Requests to my client. I found the problem, it was located in syslog Jan 14 03:45:38 mightyowl3 pppd[22256]: Couldn't open ...
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1answer
365 views

One way traffic PPTPD Server / No Internet Access

I just set up a pptp server on Debian Linux yesterday by following this guide: http://poptop.sourceforge.net/dox/debian-howto.phtml When I tried to connect to the server using both XP and iOS, the ...
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2answers
845 views

How to stop pptpd even when there are active vpn client connections?

After issued command to stop pptpd, the pptpd won't stop until all the VPN client has disconnected. The following code shows pptpd is still running after issuing the stop command. ...
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1answer
222 views

connecting to a pptpd server using openvpn client

I have a pptpd server on debian. Is it possible to use openvpn client instead of pptp client to connecting to a pptpd server?
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3answers
2k views

change default PPTP TCP port

Is there a way to make pptpd listen for PPTP trafic on a TCP port other than the default 1723 port? I khow that PPTP uses more then just tcp/1723. It also uses GRE. it's not a problem. just how to ...
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2answers
2k views

pptpd on Debian doesn't write any logs

I'm trying to set up PPTP server with Debian Squeeze. The problem is nothing is being written in the logs (neither in messages nor in debug nor in daemon.log) though debug and dump options are set. ...
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342 views

why should i set mss in iptables when using pptp?

I installed on pptp in my server. when i set mss is 1356, the packets will be lost 20% - 30% /sbin/iptables -I FORWARD -p tcp --syn -i ppp+ -j TCPMSS --set-mss 1356 when i set mss is 1186, the ...
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1answer
225 views

pptpd server does not route internet traffic?

I have set up a pptpd server on my computer and clients can connect to it successfully. I have enabled ip_forwarding in /etc/sysctl.conf and added the following rule to my iptables to masquerade the ...
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1answer
206 views

Connect to server via VPN-tunnel to same server

Sorry, if title is unclear, here is the setup: There is machine A, running Linux. A is part of university network and has single network interface with real IP. But connections from outside of campus ...
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1answer
485 views

PPTPD nic configuration and default gateway

I have a Ubuntu 10.04 server with PPTPD server. It has one nic with eth0 and eth0:0. eth0:0 has an UK IP and eth0 has a Franch IP. I have setup eth0:0 as default gateway because I want to show that ...