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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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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How do I get Ubuntu to pick up proper DNS routes over PPTP?

So here is my scenario. I have setup an Ubuntu 14.04 PPTP server setup at a remote site and it is working just fine. I can connect clients remotely via Linux & Windows. I can also ssh and RDP to ...
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Debug slow pptp connection in Ubuntu

I've unstable connection when using a VPN (pptpd), obviously it works, but sometimes is slow or not responding for a few minutes. Which log I should enable to debug the issue? e.g. due to pptpd? due ...
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How to route unknown client IPs back down their respective PPTP VPN tunnel?

I have a server that accepts VPN connections using PPTP. I'm testing the setup process for various PPTP clients and i've come across a specific issue with Android clients. Packets arrive from the ...
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111 views

Configure ufw pptpd and dnsmasq on the same server

I've got a an ubuntu 14 server running both pptpd and dnsmasq. I'm having trouble configuring ufw to allow pptp clients to resolve their DNS queries using the local dnsmasq server. I've correctly ...
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Members of my PPTP VPN can't see each others

In relation to the answer of this post: pptp on Ubuntu server can't ping other machines on the LAN Is it possible to have the members connected to the VPN see each others if they don't use the ...
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18 views

What can I do if the VPN can be connected but not loading any traffic?

I set up a VPN with pptpd on my Linux server. For many months it works fine. But suddenly it failed. The VPN can be successfully connected but no traffic can come in. Is there anything I can try to ...
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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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239 views

how to run pptp over redsocks proxy

I have one (virtual) Linux box in Ubuntu, that has redsocks set up done. Inside the machine, I could confirm that the the redsocks did work (use wget to check the external IP). Now, I want other ...
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66 views

Poptop unable to authenticate against RSA Authentication Manager via RADIUS

Unfortunately I haven't been able to find an answer to this through Googling, searching Stack sites, etc. Any help provided would be appreciated. I'm setting up Poptop and it needs to authenticate ...
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374 views

Bridge PPTP VPN with local network

I have configured on my Ubuntu a VPN server using PPTPD. I can connect to it from outside of my LAN, I can use it's internet connection. But I cannot see my LAN clients (because the VPN and the LAN ...
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280 views

PPTPD not working on virtual machine running Kali Linux

I need to capture non-http traffic from my iPhone. Using a proxy will only capture port :80 and :443 traffic which will not work for me as the traffic I am trying to capture is not from either of ...
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96 views

Can't access internet when connect to pptp vnc build on opensuse13.1

I have built a pptpd vnc server under opensuse13.1, everything looks fine when I running the pptp service. but there is problems when I connect from both android & winxp client: by winxp At ...
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154 views

CentOS 6.5 PPTPD, mac cannot connect

OS: centos 6.5 32bit OpenVZ 512MB + 512MB vSwap *nat :PREROUTING ACCEPT [2560:174872] :POSTROUTING ACCEPT [0:0] :OUTPUT ACCEPT [443:25824] -A POSTROUTING -o eth0 -j MASQUERADE -A POSTROUTING -j SNAT ...
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121 views

What is the remote IP on PPTPD settings? ( digital ocean) [closed]

I'm trying to install a vpn ( PPTPD) server using digital ocean tutorial. Everything looks straightforward except that I don't know what the remoteip ip/range is. Is it something that I should look ...
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1answer
467 views

PPTP and windows 7 809 error [closed]

I want to connect from home to my router(linux mashine) at work. i have installed pptpd. i have added following fw rules: iptables -I INPUT -p tcp --dport -j ACCEPT iptables -I INPUT -p gre -j ...
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2answers
804 views

Linux PPTP VPN server using local account passwords?

Is there a way to configure the PPTP server under Ubuntu 10.04 to allow users to log in with their username/password from the local machine (the Ubuntu server, that is, not where they are connecting ...
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25 views

Block certain logins from accessing the internet

I'm configuring a VPN server using poptop and ufw as a firewall. At the moment everybody who connects to the vpn can access the internet through it. I want to disable this based on the login. I could ...
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3answers
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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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1answer
120 views

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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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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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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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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109 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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111 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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224 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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2answers
902 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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303 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
737 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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200 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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208 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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106 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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545 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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201 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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438 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
120 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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No External Network Access Through Ubuntu VPN

I have setup pptpd as my VPN server on Ubuntu Server 9.04, I am able to connect to the VPN from the client and can access the server's local network, but I am unable to connect to the external network ...
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417 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
112 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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194 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
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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
469 views

Bind Poptop (PPTPD) to a specific interface

I have a poptop pptpd running on a server with 16 public IP's I am getting clients to connect to (for example) eth1:8's IP (I also have pptpd set to listen on the address in /etc/pptpd.conf) the ...
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4answers
555 views

ubuntu 9.04 pptp broken after a power failure

I have a small Ubuntu 9.04 router setup as a NAT box and a PPTP server. After a power failure everything except the PPTP server still works. A windows client gets to "registering your computer on the ...
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1answer
271 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 ...
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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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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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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 ...
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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
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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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3answers
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Ubuntu VPN Server (PPTPD) Configuration - Pass Traffic to Internet

I am trying to configure PPTPD on my Ubuntu box to pass all VPN traffic through to it's internet connection, so I essentially want it to work like a Proxy. I think the problem is that no default ...