Point-To-Point Tunnelling Protocol is a networking protocol which exposes a layer 2 tunnel. It uses a TCP connection for control communications, and a GRE tunnel for the actual data. It is typically used to create VPNs.

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How do you troubleshoot a PPTP+VPN+RDP freeze-up?

The symptoms are: I am at home. I am trying to dial a PPTP VPN. It connects fine. Pinging from command line in windows shows about a 30% ping success rate when the PPTP vpn is up, 100% ping success ...
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2answers
282 views

How to make httpd accessible only through the VPN?

I have a server running PPTP that is supposed to run an httpd (nginx) accessible only through the VPN. I'm also running a few other httpds too, which are not supposed to work on the VPN. routing ...
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0answers
118 views

Windows XP VPN server with Ubuntu client

I'm trying to setup VPN connection to Windows XP server with a static public IP address from my Ubuntu machine. VPN used is standart windows built-in PPTP. I have got problem when connecting. Here is ...
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1answer
188 views

Unable to connect networkshares through VPN (RRAS server only)

I have a Windows Server 2008 SP2 with these Roles installed: File server Network Policy and Access Server / Routing and Remote Access Network Policy and Access Server / NPS The VPN connection is ...
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1answer
40 views

VPN connected but no access to anything

I have a problem with the VPN server on 2008R2. I can successfully connect to the VPN server but i cannot map any drives either by IP or by name. I can ping hosts by ip but not the name. In addition I ...
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1answer
98 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
2k views

PPTP disconnects when peers disconnect

Just setup a Ubuntu 13.10 on a server, and configured PPTP VPN. Everything works just fine, until another peer disconnects his VPN connection. I was able to consistently simulate this by connecting ...
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2answers
877 views

Allow RDP only over VPN

I want to do allow 3389 port(RDP) only through VPN connection, not normally. How can I do this? I have configured VPN server in Mikrotik. I have blocked all traffic except http and https by firewall ...
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1answer
110 views

Can connect through SSTP but not PPTP?

I have a window server 2008 r2 box behind a a Netgear AC1750 router. I've set up RRAS for a VPN and can successfully connect using SSTP, but if I try to connect to the VPN using PPTP I get a timeout ...
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1answer
180 views

Can suddenly no longer connect to VPN host after reboot?

I've had a solid connection to my home VPN server (windows 2012) from my office (windows 8.1) for days over PPTP and have had no issues. This morning, I had to hard-shutdown my server due to an ...
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1answer
449 views

Centos does not open port/s after the rule/s are appended

So after some battling and struggling with the firewall, i see that I may be doing something or the firewall isnt responding correctly there is has a port filter that is blocking certain ports. by ...
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1answer
130 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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190 views

Cisco ASA, Windows Server 08, PPTP/GRE issues

I am at the end of my rope on this one. I am trying to simply forward pptp/gre through a Cisco ASA to my Windows server. Here is what I have done: Access Rules: OUTSIDE ...
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2answers
333 views

How to configure RRAS to route all traffic through squid proxy?

I have a VPN server up and running on a windows server 2003. All the users are able to connect to the server and NAT their IP (use server IP and internet). but my problem is government filtering on my ...
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1answer
369 views

l2tp/pptp + freeradius (accounting information only gets updated on disconnect)

I have a basic PPTP/L2TP setup that uses a remote freeradius server with mysql. Issue is that when a user gets connected to the vpn and as long as the user stays connected (could be hours), no ...
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1answer
363 views

PPTP not working

I keep getting this error when attempting to log on to my new VPN server.. Sep 6 14:05:19 378465 pptpd[8171]: CTRL: Starting call (launching pppd, opening GRE) Sep 6 14:05:19 378465 pppd[8172]: ...
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1answer
221 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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1answer
2k views

GRE: read from PTY failed error when connecting multiple clients to PPTP

I have just installed a pptp server and now I can make it work. The problem is, it can only be connected to by one client. How do I set it up so that it will allow multiple users? Here is the error ...
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1answer
240 views

PPTP connection gets terminated after I try to do a speedtest

my connection to pptp gets terminated when I try to do a speedtest on speedtest.net I have a vps account with centos 5 installed. It uses openvz for virtualization. on /var/logs/messages the error ...
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1answer
173 views

How do I add eth0 on centos 5 that is using openvz

I have a vps account with CentOS 5 installed. It uses OpenVZ for virtualization. Now I'm trying to install pptp service (using this guide) on it. I'm currently on Step 6 but I don't see any eth0 ...
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1answer
544 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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0answers
683 views

Windows Server: can't connect to File&Print services through PPTP VPN

We have setup a simple VPN server with PPTP enabled and have forwarded correct PPTP 1723 port and GRE 47 on plain Windows Server 2008(NOT R2). Now when I am trying to connect from any VPN client ie: ...
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1answer
291 views

Secure VPN on standalone Windows 2008 R2 server

I have been tasked with setting up a Windows 2008 R2 server, and I need to allow VPN access to it. I have RRAS set up which allows clients to connect via Windows VPN. Unfortunately, is uses PPTP by ...
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2answers
252 views

Resolve avahi hostnames via DNS

I would love to resolve avahi hostnames via DNS: I connect to the office VPN via PPTP but Avahi refuses to run on POINTOPOINT interfaces. I just want to resolve avahi hostnames via the DNS ...
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202 views

LAN to PPTP VPN bridge

I am pretty new to VPN and networking stuff so please bear with me if this seems a noob question. I have a cisco linksys e2500 router running on Tomato firmware. My situation is, I have set up a PPTP ...
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1answer
186 views

VPN with overlapping subnets?

We have a number of site to site VPN tunnels which each have a their own consecutive subnet, for example: Branch 1 - 192.168.1.0/24 Branch 2 - 192.168.2.0/24 Branch 3 - 192.168.3.0/24 Branch 4 - ...
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1answer
402 views

Ubuntu PPTP VPN to Microsoft Server Command Line ONLY

I try to setup a VPN Connection from a Ubuntu 12.04 LTS to Microsoft VPN Server (Ubuntu is the Client in this Case), but I only get this error message: .. connection failed! Check the log messages ...
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92 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
393 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
1k views

PPTP VPN connected but cannot open webpage with Mac

I've setup a PPTPD on my VPS(Debian) which I used to use very well from my android phone and windows laptop. Now I want my new Mac Mini to use it too. It's shown the Mac can establish the vpn ...
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0answers
691 views

PPTP refusing to connect when client is windows

I have a PPTP server running and I can connect to it from linux. When I try from windows 7 (2 instances tested) it fails. Here's the syslog for such a conn: pptpd[540]: CTRL: Client 109.xxx.158.201 ...
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342 views

Unable to setup PPTP VPN on SUSE Enterprise 11

I am new to Linux, however I will try to convey my question the best I can. Right now we are using Windows Server 2003 as a DHCP server. It also has PPTP VPN installed. Users can get to VPN outside ...
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1answer
125 views

Access My Server From External Net IP While Server is Using PPTP [closed]

I have one physical Ubuntu server where I'm using PPTP with HMA for tormenting (using Deluge) and hosting the Deluge Web-UI, Ajenti and Ajaxplorer. While PPTP is engaged I can access my three web-UIs ...
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1answer
176 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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0answers
144 views

linux PPTP server custom authentication script

Suppose I have a lot of PPTP VPN servers and I want a good way of authenticating users. Each user must be able to create a maximum of 2 concomitant connections to any given server. With the current ...
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3answers
244 views

Logging OpenVPN/PPTP connections

I currently have a default setup of OpenVPN and PPTP. I was wondering how I can enable the most verbose logging of the services so in case of abuse we can track down who's IP did what?
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1answer
181 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
381 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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2answers
2k views

How to view pptpd clients?

I have installed pptpd in my linode vps, and setup a few client accounts. The problem is how could I view current connected pptpd clients in commandline?
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1answer
79 views

VPN and Lan visibility

I have enabled VPN pass-through and configured our router to forward pptp port (1723) data to go to our linux server running pppd and pptpd, this works, I can establish the connexion using my windows ...
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1answer
748 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
670 views

how to manually setup pptp vpn in linux?

I tried to setup the pptp vpn in ubuntu i.e /etc/ppp/peers/myvpn Its contents are pty "pptp <host> --nolaunchpppd" name myusername remotename myvpn linkname myvpn ipparam myvpn usepeerdns ...
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1answer
1k views

PPTP VPN connections stops working after period of time

I have a client with an SBS 2011 server which is acting as a PPTP VPN server that is having difficulty maintaining working VPN connections to their server for remote workers. Client machines are able ...
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2answers
2k views

Windows Server VPN: Error 720

I want to created vpn server on Windows Server 2012. First I installed Active Directory domain services, then Remote Access server role. Opened Gettng Started Wizard, entered configure just vpn. Then ...
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1answer
193 views

What is my local address on the router when connected through PPTP?

I have just set up my very first VPN this week allowing me to connect to work (this way, I get to work from home, which was worth the effort). As through magic, it now works, and I'm sending this ...
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1answer
96 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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2answers
89 views

Failsafe VPN solution?

I need to set up a VPN. I experimented with PPTP, but I got a lot of problems. VPN connection doesn't work behind some routers or mobile / wifi connections. So I'm looking for a failsafe VPN ...
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1answer
123 views

puzzled by VPN, can not see machines in network

I have set up a VPN tunnel between office and rackspace, this all works and i can access my servers by there local IP. However i wish to remove ALL remote access away, so have created a VPN tunnel ...
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0answers
394 views

VPN (PPTP with MPPE 128) + SMB2 -> plain text transmissions?

Setup: I have a simple test setup: PC (Win7) and Server (Win Server 2008) and I open a VPN tunnel between the two of them via PPTP (encrypted with MPPE 128). The server has a shared folder that the ...
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0answers
177 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 ...