Fedora Networking :: Establishing A Vpn Connection Using Vpnc / Error Failed To Bind To 0.0.0.0:500: Address Already In Use?

Nov 24, 2010

I am having difficulties in establishing a vpn connection using vpnc (or NetworkManaager-vpnc).

As long as the openswan IPsec daemon is running, vpnc-helper quits with the error message

Quote:

Failed to bind to 0.0.0.0:500: Address already in use
[user@computer ...]# vpnc-helper --local--port 0

If I use NetworkManager-vpnc, then establishing the connection simply fails.
Using the --local-port 0 option does not change anything.

If I stop the ipsec service (service ipsec stop) then establishing the connectiong works, both with NetworkManager-vpnc and the console tool, but apparently the network traffic is not routed via the VPN - in my case this means that I cannot access hosts within the vpn and stuff.

Funny thing is - on my notebook from where I connect via WLAN, everything works fine. With Fedora 13 everything works fine, too.

Does anybody have an idea how to enforce that the vpn connection is actually used?

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Fedora Servers :: OpenVPN - Socket Bind Failed On Local Address

May 4, 2011

I finally got the certs to configure:
openvpn --config server.conf
Tue May 3 17:26:27 2011 OpenVPN 2.1.1 i686-redhat-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] built on Jan 5 2010
Tue May 3 17:26:27 2011 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Tue May 3 17:26:27 2011 Diffie-Hellman initialized with 1024 bit key
Tue May 3 17:26:27 2011 TLS-Auth MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ]
Tue May 3 17:26:27 2011 ROUTE default_gateway=192.168.122.1
Tue May 3 17:26:27 2011 TUN/TAP device tun0 opened
Tue May 3 17:26:27 2011 TUN/TAP TX queue length set to 100
Tue May 3 17:26:27 2011 /sbin/ip link set dev tun0 up mtu 1500
Tue May 3 17:26:27 2011 /sbin/ip addr add dev tun0 local 10.8.0.1 peer 10.8.0.2
Tue May 3 17:26:27 2011 /sbin/ip route add 10.8.0.0/24 via 10.8.0.2
Tue May 3 17:26:27 2011 Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ]
Tue May 3 17:26:27 2011 Socket Buffers: R=[114688->131072] S=[114688->131072]
Tue May 3 17:26:27 2011 UDPv4 link local (bound): [undef]:1194
Tue May 3 17:26:27 2011 UDPv4 link remote: [undef]
Tue May 3 17:26:27 2011 MULTI: multi_init called, r=256 v=256
Tue May 3 17:26:27 2011 IFCONFIG POOL: base=10.8.0.4 size=62
Tue May 3 17:26:27 2011 IFCONFIG POOL LIST
Tue May 3 17:26:27 2011 Initialization Sequence Completed

But openvpn still won't start; where to go from here.
Tue May 3 17:54:25 2011 TCP/UDP: Socket bind failed on local address 192.168.122.3:1194: Address already in use
Tue May 3 17:54:25 2011 Exiting

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Feb 2, 2010

In fc10 & fc11 everything worked well with vpnc.

With fc12 vpnc starts allows me to connect to my work site then everything works fine til I try and start a remote desktop connections to a windows client use tsclient. All I get is a blackscreen and my laptop is hung.

At work without the vpnc it works fine if I start the vpnc from nm it performs the exact same way and I get the blackscreen.

I have disable selinux.I also disabled the firewall

there was another gentlemen on here with the same issue.

The only way out is a hard reboot and there are no messages in the logs that say there were any problems.

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Ubuntu Networking :: Connection Failed: Unable To Get IP Address

Apr 24, 2010

So I got Ubuntu 9.10 on my laptop working really neat and wanted to upgrade my desktop to 9.10 as well. So I reinstalled Ubuntu there and now I can't connect to my network anymore....

I have a usb wireless adapter (currently Sitecom as I bought a new one today to hopefully fix it, but ended up at exactly the same problem as with my old adapter). The network manager I'm using now is Wicd since some topics I was looking through were about malfunctioning GNOME network-manager (which I removed) and suggested to try this. The GNOME network-manager kept prompting to insert my WEP network key which was a correct one. When I removed all security from the network it didn't prompt anything anymore but just failed to connect. The Wicd network manager is so nice to tell me that it cannot obtain the IP address however, so I suspect that this is my main issue... but I have no idea what I can do about this? Tried using a static IP and then I get the message "Connection failed: Could not contact the wireless access point."

I feel powerless as my knowledge here is just lacking..

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Ubuntu Networking :: Establishing A VPN Connection - Kubuntu 10.10 - 64 Bit

Apr 15, 2011

I have a problem with establishing a VPN connection, it's driving me nuts already. No matter what I try, which packages I (re)install, or how many configuration settings i change.. the result is always the same (see syslog at the end of this post). On the same machine, but on a different harddrive, I have installed Windows 7. The VPN connection works without any problems on this system.

I played already with KNetworkManager, NetworkManagerm, KVpn and so on. Further I re-installed each VPN- and network packages multiple times (eg KNetworkManager, NetworkManager, network-manager-pptp, pptp-linux). Further I tested almost every possible VPN configuration (PAP,CHAP,MSCHAP(v2),EAP,MPPE, stateful encryption, no password, BSD compression)... My syslog is as follow:

Code:
Apr 13 18:15:02 defcon-inc pppd[3721]: LCP: timeout sending Config-Requests
Apr 13 18:15:02 defcon-inc pppd[3721]: Connection terminated.
Apr 13 18:15:02 defcon-inc pptp[3731]: anon log[callmgr_main:pptp_callmgr.c:258]: Closing connection (shutdown)
Apr 13 18:15:02 defcon-inc pptp[3731]: anon log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 12 'Call-Clear-Request'
Apr 13 18:15:02 defcon-inc pptp[3731]: anon log[call_callback:pptp_callmgr.c:79]: Closing connection (call state)
[Code].....

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I'm trying to add a key public key for my dev box which is a vm running ubuntu natty, and I am unable to connect via ssh. I've tried rsa and dsa, as well as these commands:

exec ssh-agent bash
ssh-add ~/.ssh/id_rsa
ssh-add ~/.ssh/id_dsa

[Code]...

I think I've found the error by running sudo /usr/sbin/sshd -Dd, but I'm not sure how to fix it:

ebug1: sshd version OpenSSH_5.8p1 Debian-1ubuntu3
debug1: read PEM private key done: type RSA
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048

[Code]...

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Consider the following program:

Code:
#include <stdio.h>
#include <stdint.h>

[code]...

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Jun 7, 2009

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Networking :: Error: "bind: Cannot Assign Requested Address"

Jun 18, 2010

I have a small cluster (OSCAR, Fedora 8) and I was able to run some application software on it. Then lightning struck very close to the building. Fortunately I had unplugged all the power cables (because the cluster has not yet been moved to where the power lines are protected), but it seems that the institution didn't have any protection on their LAN cables, and so the whole building's public network cards are damaged. A costly lesson.

Anyway, when I tried to run the application software in parallel across the cluster (using the private network which is unscathed) I get the error message given in the subject line. I contacted the application software's help department as I thought I had perhaps forgotten to set something, but according to them it is a normal network problem.

Quote:

Check the /etc/hosts file and make sure that the nodes all have a single definition and you don't have lines like

127.0.0.1 localhost normnode3

and that normnode3 has the same address both on the master and on the node. try ping normnode3 from the master and see what address comes back 64 bytes from 164.190.57.105: icmp_seq=1 ttl=64 time=0.306 ms or is it 127.0.0.1. Then do the reverse. Also double check that you can ssh between nodes without password but I would expect a different error then. The command "hostname" returns gnlserv01, which is the public NIC.

After the lightning I had trouble getting the nodes to communicate "automatically" with each other, but it can be cured by starting the xinetd service and disabling the firewall on the master node (it's not too dangerous since I don't have a public interface at present and since I'm sitting behind the institution's firewall as well.) Just by the way, I would think that ther should be a file somewhere in which I could specify those two commands to take place when the master node is switched on. Could you perhaps enlighten me as to where and how I could specify it?

I was wondering whether I would need to explicitly start a bind-type service or something like that? (Since I had to explicitly start xinetd) I'm rather clueless really. I googled around and found that there is a named service, so I tried to start it, but I don't think it's installed on the computer. Therefore, since I have managed to run the application software in parallel previously, the named service is probably not the problem. Here is a copy of how my /etc/hosts file looks like:

Code:

# Do not remove the following line, or various programs
# that require network functionality will fail.
# These entries are managed by SIS, please don't modify them.
127.0.0.1 localhost.localdomain localhost

[code]........

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Code:
telnet mylinux 443
it responds

[code]...

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Jan 13, 2010

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Code:
sudo vpnc office
with the following /etc/vpnc/office.conf file:This is fictional data
Code:
IPSec gateway vpn.office.com
IPSec ID office
IPSec secret 0ff1c3
which worked perfecly.

So i went back to the Network Manager GUI way and i used the same credentials. Same fictional data I got a libnotify message telling me it couldn't connect.Anyone know how i could troubleshoot this issue? Would be great to have it integrated in gnome instead of running a background command which is not tracked by nwm.

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Aug 15, 2010

I am now using SLES11. My web server now error mysql. However, when I restart mysql using "rcmysql restart" the message display:

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Shutting down service MySQL done
Starting service MySQL done

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when I go to mysql using command "mysql" the message display"
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

After that I try to edit file mysql.sock but on the bottom of file display message (permission denied)

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May 10, 2011

- I setup port forwarding of openssh :

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- Then I setup second connection

connect 2: ssh -g -f -p 11111 -i /<path-to-private-key> user1@ip-server1 -L 22223:ip-server1:3306

- Openssh waring to me "bind: address already in use"

- So I think port 22223 have had another program use,I use command:

ps aux | grep ssh /* find process id of second connection */
kill -9 <process-id-second-connection>
netstat -an | grep 22223 /*find which program use port 22223> */

- but I can't find anywhat

- Then I run again command :

connect 2: ssh -g -f -p 11111 -i /<path-to-private-key> user1@ip-server1 -L 22223:ip-server1:3306

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Code:

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Jan 26, 2010

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Error
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[URL]

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