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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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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87 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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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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218 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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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
163 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
384 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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256 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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187 views

Cisco VPDN PPTP server doesn't work after put it into an VRF instance

Originally we have one internet connection for our router which served as a PPTP server at the same time and everything worked well. Recently we got another internet connection, and we want it as a ...
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78 views

Remote afp connection to diskstation server to access files

I have a server set up for work files and backups. It is a diskstation with the latest DSM (4.2) on it. I have a vpn setup with port 1723 forwarded properly. It has an external IP that I can access ...
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142 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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98 views

VPN cutting off Citrix streamed apps and local external client internet signal

My networking knowledge is weak, so please bare with me. We have Citrix XenApp Server 6.5 for Windows Server 2008 R2. Everything with this runs fine and our apps run fine until an external VPN ...
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70 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
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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130 views

Use default gateway on Remote Computer gets unchecked by GPO

A little GPO issue here, someone was playing around in the GPO's and now we have an issue that we can't figure out. We have Win7 images that use PPTP connections to connect to our backend. When the ...
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95 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
149 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
113 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
258 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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248 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
75 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
224 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
466 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
670 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
1k 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
145 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
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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2answers
74 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
89 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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146 views

Mounting a CIFS share via PPTP VPN

I have a pptpd server running on Debian. What I'd like to accomplish is to connect my windows 7 client to the Debian server and mount the windows share to the debian server. I have an application ...
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312 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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136 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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313 views

PPTP VPN support IPv6 over IPv4 [duplicate]

My Server has both IPv4 and IPv6 and I've set up an PPTP VPN there. And my local network only supports IPv4. How can I gain IPv6 access by dialing in my VPN with IPv4? That means, is it possible to ...
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183 views

Local computers can't discover computers connected via VPN - windows server 2008 r2

I have Server 2008 R2 set up on a local network with RRAS, NAT and VPN enabled. One NIC leads to the internet, with a WAN IP. Second NIC leads to my internal network. The internal network consists of ...
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3k views

PPTP IPTables routing issue

PPTP connects just fine to the radius server PPTP modules are loaded into the kernel PPTP connects fine to the pptp service Question: How do I get the PPTP to connect to the internet? IPTables: ...
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288 views

PPTP won't connect error 628

vim /etc/ppp/chap-secrets # Secrets for authentication using CHAP # client server secret IP addresses #* pptpd 34fg3g93jgij3g * and vim /etc/radiusclient/servers ...
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1answer
2k views

pppd “peer refused to authenticate”

I have a working pptpd+pppd server configured which currently has two Windows 7 clients successfully connecting. However, when I try to connect a linux client I'm getting a really weird exchange that ...
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1answer
389 views

PPTPd - configuration error?

an 5 01:09:12 vpn pptpd[1832]: GRE: read(fd=6,buffer=611860,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax ...
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122 views

iptables error on pptp

root@pptp [~]# iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE iptables: Unknown error 18446744073709551615 This is an openVZ box. Is there a way to bypass that? This is the MASQUERADE that is ...
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57 views

Tunnelling through a 3rd party firewall [closed]

I have a few IP cameras that will be behind a firewall I cannot modify (cannot open, or forward ports). They need to be reachable from my server sitting across the intertubes. Without having gone ...
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1answer
229 views

Possible to connect to VPN (pptp) with a host name

I have a few computers that I need to connect to a VPN. Right now, I have to manually check to see what IP address the VPN assigned each computer so that I can SSH into each later. Ideally, it would ...
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311 views

CentOS 5 VPN Server won't work

I have a CentOS 5 server configured to be both a L2TP server and a PPTP server + a radius server for hosting the AAA. My problem is that, the L2TP works great and I can connect to it, but can't ...
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1answer
392 views

Samba Server on public IP, cannot network browse from pptp client

I have a Samba server running on an OpenVZ VPS with a public IP. I also have a PPTP server running on the same server. I connect to it from a remote Windows PPTP client. I have everything working ...
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2answers
717 views

Unable to PPTP through NAT on Cisco 881

I'm trying to connect to a PPTP server which is sat behind a Cisco 881 NAT router. The server is running Ubuntu Server 12.04 and is running Poptop pptpd as the PPTP daemon listening for connections. ...
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129 views

Multiple Devices connecting to VPN on CentOS server

I am looking for a solution as to what would be the VPN software for multiple OSes and Devices. I currently have 15 systems to connect to a VPN. I was using Hamachi from LogMeIn but their lack of ...
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1answer
560 views

PPTP installation on CentOS 5 not working (Kernel support for PPP?)

I am trying to get PPTP installation up and running on my VPS. I have followed various guides, however, I am unable to connect to the VPN once it’s setup. I checked my VPS’ /var/log/messages and I ...
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2answers
111 views

Can a NAT close out VPN connections?

I have a client running on a VPN behind a NAT. The client becomes inaccessible after a while if it is not "active". The VPN software is PPTP and the OS of the client if Debian. I'm unsure about ...
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1answer
470 views

Split tunnel VPN with pptp-linux

I have a client installed with pptp-linux. I would like for it to be connected to a VPN (for VPN resources) as well as be connected to the internet for normal web browsing. I know this is not as ...
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1answer
146 views

PPTP VPN Windows Server 2008 Enterprise [closed]

I have a few questions that I hope that you guys can answer, so here goes. I am running Windows Server 2008 enterprise in my HOME network inside of vmware workstation. I am running this on my home ...
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1answer
2k views

VPN setup on mikrotik router

I have successfully setup a pptp vpn server on a Mikrotik routerboard. I am able to connect to the VPN and can successfully access a certain IP range. This is my setup: ADSL modem/router - mikrotik ...