Ubuntu Networking :: PPTP VPN Connection Stopped Working?
Oct 6, 2010
I managed to set up a PPTP VPN connection in Ubuntu 10.04, and it worked first time.This was about 3 months ago. It was working yesterday (Oct 05 2010), but when I came to log in to the VPN today it doesn't work. I tried the same VPN connection on my wife's laptop which runs Vista and it works. I have tried re-entering the details, even deleting and setting up from scratch via network manager. And yes I have the correct VPN plugins. what I should do. Is there a log file so I can have a look at it to see what the problem is. If there is where is it located. The computer is able to connect to the internet without any problems, just can't connect to the VPN. The only thing I can think of is that the update manager popped up this morning so a few things have got updated today. maybe something in there broke the VPN connection.
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Oct 20, 2010
About a week ago I upgraded to Maverick from Lucid.
All networking worked fine on Lucid.
I am using an Acer Laptop with the Atheros AR928X Wireless Network Adapter.
I can connect to my home network (visible, with WPA2-Personal) fine. However, I cannot connect to my university's wireless network. The only difference I noticed is that its network is using WPA2 Entreprise with Tunneled TLS Authentication and MSCHAPv2.
I tried dmesg and I got:
wlan0: authenticate with 00:1a:1e:ef:f4:e1 (try 1)
wlan0: authenticated
wlan0: associate with 00:1a:1e:ef:f4:e1 (try 1)
wlan0: RX AssocResp frin 00:1a:1e:ef:f4:e1 (capab=0x431 status=0 aid=2)
[Code].....
Unless the driver has changed, I suspect this is not a driver issue, since it worked fine on Lucid. Is this a NetworkManager issue?
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Mar 20, 2011
I'm running 10.10 on a brand new computer, and up until this afternoon the wired connection was working fine. All of a sudden it stopped working (and doesn't work in Windows either).I ran sudo dhclient and it gave me:
DHCPDISCOVER on eht- to 255.255.255.255 port 67 interval 3 (7, 9, 10, 18, 13)
No DHCPOFFERS RECEIVED
No working leases in persistent database sleeping
[code]...
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Nov 24, 2009
I have Debian installed a year ago, working perfectly until last week when network card connected to internet stopped to communicate. I did no change in configuration. It just stopped to work while I was reading an online web page. Network card connected to local network still works fine.
I thought it might be a NIC failure so I installed a new PCI NIC but no change, still no communication throught this NIC.
I verified/changed cable between NIC and the router, no luck. If I connect the same cable from router to a Windows PC, everything is OK. If I connect back to Debian machine, it does not work.
I tried connect this NIC with a different router with DHCP enabled, nothing, NIC will not communicate with DHCP server.
I tried to set static IP, no change.
Today I booted a Knoppix 6.2 and this NIC worked perfetly! It set up using DHCP, I could access the internet.
I booted machine as usual and the problem still persists of course.
This is information captured immediately after boot. The trouble NIC is eth0 after boot finishes.
All this was captured with eth0 connect to a router with DHCP enabled. There is no DHCP entry in syslog related to eth0. Reinstall is the very last option.
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Feb 6, 2010
My ubuntu karma desktop is plugged into a wired connection that goes through a router and into my cable modem.Everything was working fine like it had been foseveral months yesterday morningSomething happened by the end of the day that has screwed up my wired networking. I plugged my laptop into the same cable thats plugged into my ubuntu, and the cat5 cable is live. Also when I plug said cable into the ubuntu box, the ethernet lights come on, or atleast a solid green one. Meanwhile the network connections Icon continues to have a red X and a tooltip saying "No network connection".
Under network settings, there is only one wired network "Auto eth0", but it says "last used: never" which is strange since I've been using this for months. When I click edit the main settings are MTU automatic, ipv4 automatic DHCP, and ipv6 ignore.hat could the problem be? By chance did a karma update get released that broke the networking
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Jul 4, 2010
I installed Ubuntu 10.4 side by side with my Vista. This is on a PC I leave on permanently and use as a sort of Sever, so Security and Network connection are VERY important on this device. I use it for documents and IP PBX (telephone system). I currently use Vista and 3CX, but I plan to roll it over to Unbuntu full time once its up and runnng correctly - I will just need to change the Grub2 conf priority. After install, all was fine and I managed to make many changes to settings, apps and updates, but I have noticed in the past week when going in to make further changes the network has suddenly stopped working! According to Network Manager and the icon on the panel it is connected and I can not see anything obvious that is not correct. I tried doing a PING (192.168.1.1) from Network Manager to the main router, but it failed. I know that there is nothing wrong with the network nor the card or PC it all sits on. It's working now with Vista and my other machines. It must be a config some-where.
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Apr 8, 2010
I have ubuntu 9.10 and my wireless connection has been working perfectly until a few weeks ago when I updated my laptop. I can connect to the internet using my wired cable but not by wireless. There is nothing listed under my wireless list. I am new to this and have been unsuccessful in getting my wireless connection going again. I don't even know were to begin. I have a 2wire modem also.
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Jul 23, 2009
After using fedora 11 for a month or two now the ethernet gave out on me tonight. However if I switch to my ubuntu or windows XP install it runs fine. I made no recent changes to network connections, and no installed programs that should effect it.
kernel version: 2.6.29.6-213.fc11
default connection: eth0(and only connection)
ifcfg-eth0:
# Networking Interface
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:1F:C6:DB:05:0C
ONBOOT=yes
TYPE=Ethernet
IPV6INIT=no
USERCTL=no
NM_CONTROLLED=yes
NAME=eth0
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
DNS1=192.168.1.254
PEERDNS=yes
PEERROUTES=yes
I have tried, restarting, older kernel, restarting services, and clearing the DNS Cache. The specific error I get is that "Firefox can't find the server", and most other applications return similar. I can however ping websites still. All other computers on the network are running fine, and booting into another system the internet will work. Just not for fedora.
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Mar 12, 2010
I setup a PPTP VPN connection in ubuntu 9.10 (x86_64) using NetworkManager. After enabling the VPN connection, I can browse web pages (it's perfect) but after a while the vpn connection is terminated! The following is my syslog after connecting and terminating:
Code:
Mar 12 22:10:10 amir-desktop NetworkManager: <info> Starting VPN service 'org.freedesktop.NetworkManager.pptp'...
Mar 12 22:10:10 amir-desktop NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.pptp' started (org.freedesktop.NetworkManager.pptp), PID 2204
[Code]....
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Feb 11, 2010
I tried to configure my vpn connection using pptp from the shell following following tutorial: [URL] now, if i use Code: pppd call novax to connect to my vpn i see following appearing in /var/log/messages:
Code:
Feb 10 21:11:57 reg-laptop pppd[2655]: pppd 2.4.5 started by root, uid 0
Feb 10 21:11:57 reg-laptop pppd[2655]: Using interface ppp0
Feb 10 21:11:57 reg-laptop pppd[2655]: Connect: ppp0 <--> /dev/pts/0
Feb 10 21:11:58 reg-laptop pppd[2655]: CHAP authentication succeeded
Feb 10 21:11:59 reg-laptop pppd[2655]: MPPE 128-bit stateless compression enabled
Feb 10 21:12:00 reg-laptop pppd[2655]: local IP address 10.243.249.22
Feb 10 21:12:00 reg-laptop pppd[2655]: remote IP address 10.243.249.20
verifying with ifconfig, my ppp0 ip is correctly set to 10.243.249.22 - i can also ping this ip but i tried to ping other ips in our network and i can't reach any of them - did i mess up the route maybe? Content of my /etc/ppp/ip-up.d/route-traffic:
[Code]...
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Mar 6, 2010
I'm using Kubuntu 9.10, my pppd version is 2.4.5 and pptp is 1.7.2 I'm trying to connect to the iPredator VPN service, but I keep running into problems with LCP. I've tried using knetworkmanager, nm-applet, kvpnc and plain old text-based configuration to no avail. Here's a snippet of pppd's output:
[Code].....
(I've got "defaultroute" in my /etc/ppp/peers/ipred config file.) Any ideas what could be causing this? Could it even be my router? It claims to support PPTP, but considering it claims a lot of other things which aren't true, I wouldn't be surprised if it was the culprit.
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Sep 15, 2010
i set a pptp -vpn connection.but i cant post anything in facebook. is there any specific settings i have to do?
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Sep 20, 2010
I am using relakks.com VPN Service and set it up with gnome's default nm-manager interface. Everything is just perfect when I'm browsing the web. I can do it for hours and nothing happens. On the other hand, when I open up a torrent client - after 15 seconds to 2 minutes - I get a nice kick off the VPN.
It goes like this:
Code:
Sep 20 08:25:11 NPC pptp[3496]: nm-pptp-service-3490 warn[decaps_gre:pptp_gre.c:426]: discarding bogus packet 94236 (expecting 93663)
Sep 20 08:25:11 NPC pptp[3496]: nm-pptp-service-3490 warn[decaps_gre:pptp_gre.c:426]: discarding bogus packet 94237 (expecting 93663)
[Code].....
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Jul 20, 2011
I am unable to make my VPN connection to my university work correctly. Before, it would work some of the time without changing any settings. Now it never works. Unfortunately my institution does not provide support to linux users (outrageous!) so I'm on my own. Here is a link to the configuration instructions for windows and mac users, I've tried to configure mine based on this information but I have not been able to do it.
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Jun 26, 2011
I have just managed to setup a small server were I run rtorrent through och VPN tunnel pptp based. When I start up my server without starting the tunnel it looks like this.
[Code]...
I guess that something happen with the VPN connection, assigned a new ip number maybe and that that made the change.
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Dec 27, 2010
Here's my setup: Slackware 13.1 External IFace = eth0 / DHCP (assigned from comcast) Internal IFace = eth1 / 192.168.0.0/24 I've made it connect/authenticate, but I can't get anything to route through it..
[Code]...
Really wanting to try and get this setup to where all computers on my lan are forced through the VPN, i've tried most of all things I've googled, and no real luck.
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Apr 25, 2011
10.04 Ubuntu, Have tried every single combination of fields in the Advanced options area when setting up the VPN.
Code:
Apr 25 02:48:10 John NetworkManager: <info> Starting VPN service 'org.freedesktop.NetworkManager.pptp'...
Apr 25 02:48:10 John NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.pptp' started (org.freedesktop.NetworkManager.pptp), PID 12263
Apr 25 02:48:10 John NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.pptp' just appeared, activating connections
Apr 25 02:48:10 John NetworkManager: <info> VPN plugin state changed: 1
Apr 25 02:48:10 John NetworkManager: <info> VPN plugin state changed: 3
[Code].......
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Feb 25, 2010
I have updated the system this morning and the vpn stopped working!It gives me an error: invalid secrets.I use network manager to connect to a pptp vpn connection, I use fedora 12.Does anyone know the problem?
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Nov 11, 2009
I am trying to connect to our work server (windows), however, without succes In the log I get the message: "Failed to parse server response"
And when I close the vpn connection window I get "there were no valid vpn secrets"
I Use F10 with xfce on an aspire one.
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Apr 2, 2010
recently i rent a xen vps intended to setup a PPTPD vpn server for me and my friends. so we can by-pass the great firewall in china and get back on ....., facebook and stuff. i have already setup the server and i can connect to it without any problem. but i still want to do some further configuration the server:
1. i want to limit the bandwidth to 400k/s per connection.
2. i also want to limit the max connection per user a/c
i have some thoughts on the 2nd requirement. in the user configuration file of /etc/ppp/chap-secret, you can specify the range of ip the user can get, does it limit the max connection per user a/c? or they can connect anyway, just every now and then a box pop up says conflict in IP address?
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Jan 7, 2011
I am trying to connect to a PPTP VPN at work, and I cannot accomplish that. Both server and client are using Ubuntu 10.10.
Code:
Jan 7 11:32:26 multicore-dev03 NetworkManager: <info> Starting VPN service 'org.freedesktop.NetworkManager.pptp'...
[code]....
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Jul 16, 2011
I can't get the CentOS version of pptpd to work. I have a Debian 6 one with the exact same setup that does work. The required port is open according to various external port checking websites. It's giving me random errors when trying to connect, including 800, 809, 619. This is what I did so far;
Step 1. Installing pptpd the pptpd is the daemon that runs the pptp server.
To install this:
Step2. Next you will need to modify the pptpd.conf
Step 3. The vpn server is now configured and now you must setup authenticated users:
Step 4. When pptpd was installed it started automatically so we will need to restart it to apply the changes:
Now, if you would like to add internet access over this vpn, you can do this:
And find the line for ipv4 forwarding and make sure it = 1:
Then use iptables to get the net forwarded:
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Apr 16, 2010
I'm trying to use a vpn server which uses pptp. I've set up pptp as per the Debian Howto and it seems to be working, but I'm not actually acessing the net via the server.Not sure what info would be useful but here are route -n and ifconfig.Can anyone suggest what is wrong here, and how to test if the vpn link is actually working?
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Mar 13, 2010
i have a VPN server PPTPD on Centos 5.3
eth0: 62.2.2.x (public on the internet)
GW: 62.2.2.1 (cisco router)
i want to configure my ppptp server to allow users access internet with their own public ips of class 62.2.3.0 62.2.4.0 62.2.5.0
every time i configure my server all users can get thier IPs but they only go out with my server IP same as NAT not routing.
can you show me the proper configuration to make my users connect with public IP and have internet access. use specific DNS ( i did this but some users can not brows by DNS)
is there any way to specify an expired date for each pptp user.
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Sep 17, 2009
I'm trying to connect to a Microsoft ISA PPTP server from my Linux box. The box I'm connecting from is itself a router. I have no problem connecting a Windows XP machine to the VPN via this machine. This is fine, but I would rather connect via the Linux machine, giving me far more advanced routing options (i.e. no to send every packet from the XP box completely unnecessarily via the PPTP tunnel). The Linux router is running Debian Lenny.
I've checked iptables. There were initially some issues. I've fixed those.
Invoking pppd from the console, I can see that authentication succeeds, but then some negotiation goes wrong and the server terminates the connection. Here's the output from pppd, with the more sensitive stuff removed:
Code:
<hostname>:~# pppd call <peer> nodetach debug
using channel 19
Using interface ppp0
Connect: ppp0 <--> /dev/pts/2
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe3e45f75> <pcomp> <accomp>]
code....
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Oct 1, 2010
I have openssh running it was working last week then an update was done and now ssh does not work. removed the updates and the problem still exists.
Its CentOS 5.5 with all the latest updates for 64 bit!
Issue if as follows:
Connect locally to the loop back ip or remote ip the connection is disconnect right after the correct password is entered.
Here are copies of the log, sshd config.
sshd config:
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Apr 2, 2010
I have been using my laptop as a development machine for a few months now, developing php/mysql applications, and testing them offline via the same laptop by pointing the browser to url.
But a few days ago, my url stopped working and I discovered that it will now only work if I have an active internet connection plugged in. Why has this happened and how to I fix my test server so localhost works with or without an internet connection via an ethernet cable.
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Jul 6, 2010
I got connecting to our NAS over NFS working perfectly. Direct NAS Reading & Writing - How? But on Saturday I found out it had stopped working. For no apparent reason, not straight after an update either I don't think. When I manually try to mount --verbose:
mount 192.168.100.14:/IHL /mnt/IHL --verbose
mount: no type was given - I'll assume nfs because of the colon
mount.nfs: timeout set for Tue Jul 6 14:48:32 2010
mount.nfs: text-based options: 'addr=192.168.100.14'
mount.nfs: Unable to connect to 192.168.100.14:111, errno 111 (Connection refused)
mount.nfs: mount to NFS server '192.168.100.14:/IHL' failed: System Error: Connection refused
Corresponding fstab line that used to work just fine. 192.168.100.14:/IHL /mnt/IHL nfs auto 0 0 For now, I can drop back to Samba but this is a PITA as I can't open OpenOffice documents and write to them directly on the NAS. The fact smb://192.168.100.14/IHL works proves networking wise we're cool too. There is no firewall between this PC and the NAS, the NAS is instructed to allow my PC's LAN IP full access. OpenSuse's software firewall has been told to allow NFS Client too. Why would this setup break out of nowhere? How can I debug this best? I see nothing relevant in /var/log/messages How can I get it to work again? A hopeful reboot didn't do its usual wonders...
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Feb 22, 2011
I have a machine running with slackware64 13.1 and vnc servers is installed on it. It worked for months until yesterday, when I couldnt connect to the machine remotely.
I have 2 vnc "users" on this machine, root and "user". Each have their own desktop. Root has desktop :1 and user had desktop :2. Simple enough.
VNC servers is started via /etc/rc.d/rc.local with the command:
Code:
Code:
It worked flawlessly. I use the very same configuration on my home server, never had a glitch.
From the "distant" machine, I get this error when I try to connect:
Code:
Unable to connect to VNC server
What has changed so it no longer works? I assume its not a network problem since the machines are all located in my home network and there is no firewall or router in between them.
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Jul 13, 2011
When originally installing 11.04 I had problems getting my Ralink 5390 wireless card to work.
Today my computer froze completely and I had to turn it off via the power switch. When I turned it back on, wireless was no longer recognized! My iPod can connect to the network just fine, so it must be an Ubuntu problem. There are no problems with my ethernet connection either.
I researched this and found several threads about blocking and unblocking wireless devices using the rfkill command. Well, unfortunately for me the rfkill command doesn't work. When I type sudo rfkill list or sudo rfkill unblock all, nothing happens; it just returns me to my bash prompt. I even tried uninstalling and reinstalling rfkill...nothing.
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