Ubuntu Networking :: Cant VNC Over SSH - Error: Connect_to 123.243.**.** Port 5900: Failed
Feb 4, 2010
I have successfully connected to my ubuntu server from XP using VNC over SSH from within my internal network.But when I try from an external network I can SSH but VNC times out. Using netstat I see vino server listening on 5900. Using ps -ef I see vnc and vino-server and vino. In auth.log I see :
Feb 4 17:07:25 DellD600 sshd[8754]: error: connect_to 123.243.**.** port 5900: failed.
Feb 4 17:11:14 DellD600 sshd[8754]: error: connect_to 123.243.**.** port 5900: failed.
These entries coincide with when vnc times out, after a minute or so. I have tried realVNC and TightVNC with similar results. Im connecting specifying localhost in VNC and port 5900 in and out in putty - same as I do when connecting locally. The error messages dont give me a lot to go on. Im assuming the problem must be on the ubuntu server itself since Im getting in through SSH and hitting the logs ?
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Aug 7, 2010
When I use the following command:
ssh user@ssh_server -L 5500:localhost:5500 -p 22
everything works fine. I can log in, and local port forwarding is done. Otherwise when I use the command:
ssh user@ssh_server -R 5500:localhost:5500 -p 22
I get an error "remote port forwarding failed for listen port 5500". However when I try remote port forwarding in WinXP by use of putty there is no problem...
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Sep 17, 2010
I am trying to access my desktop remotely via VNC. I can already access my computer using ssh, and I managed to open port 22 on my router:
Now I must open port 5900 for VNC, and I think I did exactly the same thing:
Using [url](a port check service), however, my port 22 is OPEN and my port 5900 is CLOSED. Yes, I restarted my router after making the changes.
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Dec 19, 2010
I've recently been taking a look at my router settings and I've realized i have my vnc port open for some reason. I don't know how or why it got opened because I've only used vnc within my private lan. Anyway, the problem is I couldn't figure out how to close that port on my router, so I just uninstalled all the vnc software from my computer so it wouldn't act like a vnc server for anybody trying to access it from the outside. So, effectively, I cannot vnc into my computer from outside my private lan, but when i port scan my public ip, the vnc port still appears open.
I'm wondering if there's something i'm missing. I'm sure it must be something in the router that I haven't figured out... something that's keeping port 5900 open.
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Sep 14, 2010
Connect debounce failed port 3 disabled. i get this in the terminal (alt+f1) every time i log on. i like this terminal better than the standard one and i want the error message to stop appearing every time i try to type something.
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Jun 20, 2009
I am running lmgrd on CentOS5, but it returns Failed to open the TCP port number in the license. The port is 27000, how can I open that port?
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Jun 21, 2011
I get the following error whenever I launch bash:
Code:
mkdir: cannot create directory `/dev/cgroup/cpu/user/5900': No such file or directory
bash: /dev/cgroup/cpu/user/5900/tasks: No such file or directory
bash: /dev/cgroup/cpu/user/5900/notify_on_release: No such file or directory
It seems like it's probably from this part of .bashrc:
[Code]...
What does this code do, why, and what's causing it to go wrong?
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Jul 20, 2010
I tried to make "ssh tunneling", but failed and got this message.
Quote:
Administrator@windstory-PC /
$ ssh -R 7869:localhost:7869 windowsstudy@192.168.0.4
windowsstudy@192.168.0.4's password:
Warning: remote port forwarding failed for listen port 7869 Last login: Wed Jul 21 01:56:04 2010 from 192.168.0.2 -bash-3.2$
1. system environment
192.168.0.2 - windows 7 + copssh
192.168.0.4 - centos 5.4 x86 + openssh
2. Guide for setting "ssh tunneling"
[URL]
3. Added this to sshd.conf
Quote:
AllowTcpForwarding yes
4. "netstat -na|grep 7869" at 192.168.0.4
Quote:
[root:maestro:~]# netstat -na|grep 7869
tcp 0 0 0.0.0.0:7869 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:7869 127.0.0.1:53539 ESTABLISHED
[code]....
5. result of "ssh -vvv -R 7869:localhost:7869 windowsstudy@192.168.0.4"
Quote:
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
[code]....
6. I added 7869 for telnet service as follow;
Quote:
mytelnet 7869/tcp # My Telnet server
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Feb 12, 2011
Having a problem with my Belkin wireless adapter when trying to stream music to my Pinnacle Soundbridge.The network connection is usually rock steady but drops anywhere between and few second and a few minutes after streaming music. Network manager still shows the connection to my home network as active but it is not. The connection comes back when I unplug the dongle and plug it back in. I found the following message repeated in the syslog
phy3 -> rt2x00usb_vendor_request: Error - Vendor Request 0x06 failed for offset 0x3040 with error -110
Only thing I have noticed is that it refers to rt2x00 when I had thought it used the rt73usb driver.Had the PC and the Soundbridge for a number of years without any problems but I did recently have to reinstall Ubuntu from scratch. Currently running Ubuntu 10.10
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Feb 18, 2010
I want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused
while
nc -v -w2 -z localhost BBBB
[code]....
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Mar 31, 2010
When the RPM runs it come up with this error. How do I install the required dependencies? I have added more repositories, but still there are a few dependencies missing. Is there a zypper/sudo -get or something available? Opensuse 11.1 Gnome
[code]...
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Feb 16, 2010
I have configured NFS Server on CentOS 5.2 with IBM Web Server,which is having AIX 5.3 The IBM Web Server can upload all data onto NFS Server. Now, Today i was having slow response on IBM Web Server & by measuring the NFS, i found below error while running "tcpdump" command on CentOS Server.
tcpdump -n -i eth1 | grep 2049
18:36:37.237451 IP 10.100.19.241.2049 > 10.100.19.88.1758143293: reply ok 1448 read [|nfs]
18:36:37.237476 IP 10.100.19.241.2049 > 10.100.19.88.539981409: reply ERR 1448
18:36:37.237481 IP 10.100.19.241.2049 > 10.100.19.88.796287348: reply ERR 1448
[code]....
I have changed Network Card in CentOS. All LAN is on Gigabit Network. Also I have changed the Network Cable(Patch Cord). But,still no response.
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Feb 11, 2009
I'm trying to connect with my server via telnet, but when i sent the command (telnet xxx.xxx.xxx.xxx Port) doesn't works and shows then follow error: Unable to connect to remote host: Connection refused, It happens with any port. Is strange but my telnet services works (telnet xxx.xxx.xxx.xxx), In addition, i tried with firewall enabled and disabled and the problem still happens. My centOS run on virtualbox.
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Jan 16, 2010
I have been working on this for a while now and am absolutely stumped. Basically, what i am attempting to do is make my ubuntu box into a gateway for my network. I have everything working thru hard wire, but I simply cant get the wireless to work. No matter what I do, I cannot get my wireless card to transmit an essid and allow nodes to connect. I have tried assigning it in the interfaces file (shown below), and I have also tried manually modifying it using the iwconfig command. Here is the topology:
eth1: internet WAN
eth2: ethernet out to LAN
ra0: wireless out to LAN
Here is a copy of my /etc/network/interfaces file:
[CODE]
auto lo
[Code]...
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Jun 20, 2010
I am trying to set up my Ubuntu 10.04 netbook to see my WinXP desktop's files and vice a versa. I followed the steps in this tutorial thread: HOWTO: Setup Samba peer-to-peer with Windows. I got as far as "Time to add yourself as an samba user." at this point I keep getting the following error:
Code:
sudo smbpasswd -L -a WinXP_User_Name
New SMB password:
Retype new SMB password:
Failed to add entry for user WinXP_User_Name.
My WinXP machine has no password.
My conf file is here:
[global]
; General server settings
; netbios name = WinXP_Computer_Name
server string =
; workgroup = WinXP_WorkStation_Name
announce version = 5.0
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_KEEPALIVE SO_RCVBUF=8192 SO_SNDBUF=8192
passdb backend = tdbsam
security = user .....
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Jan 24, 2011
i set up openvpn on server and configure it then create license file for client and done the rest but when the client want to connect i got the following error :
TLS Error: TLS key negotiation failed to occur within 60 seconds
and now the strange part is if i connect my pptpd connection ( which runs on another server ) and then connect openvpn again i connect instantly without any problem or error in my country im sure there is heavy firewall on all outgoing traffic but currently i do not understand what can cause this problem
i ran tcpcump and seems server receive packets and send it back to client ( though im not sure if client can get the response ) this is my server.conf
Code:
local myserver ip #Replace with your server IP address
port 443 #Replace with the desired port
proto udp #Choose between tcp and udp (remove instructions in bold)
[code]...
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Jan 6, 2010
hakan@hakan-desktop:~$ smbtree
WORKGROUP
HAKAN-LAPTOP hakan-laptop server (Samba, Ubuntu)
cli_start_connection: failed to connect to HAKAN-LAPTOP<20> (0.0.0.0). Error NT_STATUS_BAD_NETWORK_NAME
[code]....
one hour later. dont change anything.
hakan@hakan-desktop:~$ smbtree
WORKGROUP
HAKAN-DESKTOP hakan-desktop server (Samba, Ubuntu)
HAKAN-DESKTOPdeluge
[code]....
what can i do?
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Oct 9, 2010
I'm running a Geforce FX 5900 Ultra with nvidias 173.14.27 driver. I'm running slackware 13.1 with kernel 2.6.35.5.
I get a horrible slowdown which is noticeable in emulators such as bsnes and kega fusion. I also think it's responsible for other issues that involve zsnes flickering like mad and hanging. Zsnes will actually crash if I select any filter plugins with opengl output modes.
Kega Fusion slows down to a crawl (we're talking 10 fps) immediately before loading a rom. Playing a rom makes it even slower.
Bsnes has the same kinda slowdown as kega fusion (even worse since it's so cpu intensive) when I activate scanlines or any type of output filter with opengl. Otherwise with no filters and just plain opengl it seems to run fast like it should...
Gens-GS doesn't seem to enable any filters in fullscreen mode... They work however in windowed mode with no slowdown issues...
I've compiled and installed SDL 1.3 from hg repository, then recompiled bsnes just to test it with newer SDL. Unfortunately the problem persists even with a newer SDL version which thankfully for me means I can revert to the older stock SDL without having to recompile everything else haha!
It's funny because I thought these issues were related to the emulators and not the video card drivers. I had these issues for a couple years running ubuntu and trying other distros. When I installed Slackware 13.1 I decided to try my Radeon 9700 pro and kega fusion no longer had this slowdown issue! I switched back to my Geforce and installed nvidia's drivers and immediately had slowdown issues... I'm gonna switch back to the radeon card and test the other emulators but otherwise it'd be nice to know if there's a solution to this issue...
Ok I installed my radeon card: nvidia-installer --uninstall, then updated xf86-video-ati from 6.13.0 to 6.13.2. Even though kega fusion runs fine I get even worse problems with everything else! LOL so I'm going back to my geforce card.
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Nov 2, 2010
I am currently trying to upgrade over 100 rpms on multiple Red Hat servers. Whenever I try to do a rpm -u /packages/*.rpm i recieve a failed dependencies error on the very first rpm. I know that I can go though each rpm one by one and trace each dependency but that will take forever. Is there a way to skip these errors? I know the -nodeps command for rpm but I dont want to screw something up but running all of these rpms on -nodeps
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Jan 2, 2010
I have two computers running Ubuntu 9.10, both have one shared folder. These were set up via Nautilus.
On computer 1 I can see and use the shared folder of computer 2 just fine.
On computer 2 I can NOT see the shared folder of computer 1 anymore since recently. I has worked in the past.
Some more information: the name of computer 1 is "daniel", the share name is "gedeeld". So the address of the shared folder of computer 1 would be smb://daniel/gedeeld/
Opening this address in Nautilus works fine on computer 1 (that shares the folder), but results in an error on computer 2.
Error: failed to mount Windows share. Please select another viewer and try again.
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Jul 14, 2011
I want to set my ip as static and port forward it through a specific port can anyone help me with this im using ubuntu 10 with 64 bit OS
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Feb 21, 2010
I went to shut down a Dell Inspiron 1545 laptop, and about halfway through the little yellow/orange bar the screen went black and it said:
"xxx.xxxxxx hub 2.0: 1.0 connect-debounce failed port y disabled" (xxx.xxxxxx being a different number string each time, and y being a port number)
It gives me that message for 3, sometimes 4, ports--3 times (port 2, port 3, port 1, port 2, port 3, port 1, etc.). Once I got that while starting up. Near the end of that colored bar, it gave me the black screen, and then this big long list of stuff it was checking. When it got to starting Bluetooth, it started that connect-debounce thing for all the ports. Then there was some other stuff that disappeared faster than I could write it down. However, Ubuntu did a system check the next day, and that start up issue disappeared--at start up and shut down. A couple of days ago, it started the connect-debounce thing on shutdown again. Ubunutu did a system check, but it did not fix the shut down issue or get the USB mouse/items to work.
I post the below output.
coach@coach-laptop:~$ tail -f /var/log/messages
Feb 21 15:06:13 coach-laptop -- MARK --
Feb 21 15:26:13 coach-laptop -- MARK --
Feb 21 15:46:13 coach-laptop -- MARK --
Feb 21 16:06:13 coach-laptop -- MARK --
Feb 21 16:26:13 coach-laptop -- MARK --
Feb 21 16:46:13 coach-laptop -- MARK --
Feb 21 17:06:13 coach-laptop -- MARK --
Feb 21 17:26:13 coach-laptop -- MARK --
Feb 21 17:46:13 coach-laptop -- MARK --
Feb 21 18:03:59 coach-laptop kernel: [385082.408075] usb 2-2: USB disconnect, address 44
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Apr 4, 2011
I'm trying to use iptables in order to forward all the incoming packets for port 5555 to port 5556 on the same server (192.168.2.101).
I wrote the following commands:
iptables -A PREROUTING -t nat -i any -p tcp --dport 5555 -j DNAT --to 192.168.2.101:5556
iptables -A FORWARD -p tcp -m state --state NEW -d 192.168.2.101 --dport 5556 -j ACCEPT
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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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Oct 14, 2010
Subprocess failed. Error: RPM failed: installing package xen-4.0.0_21091_06-0.1.1.x86_64 needs 27MB on the /boot filesystemI seem not to be able to change the size of the /boot, but 11.2 loads okay but not 11.3There only 19MB left from 66 and I can't make it bigger, I hope there is someone thathas seen this. I would like to see some of the update with XEN.
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Jan 27, 2010
I have an external hd attached to my one computer at home, use DynDNS to give it a static address, and can usually ssh into the machine fine. I ran update a few days ago and now have the much-aligned "connection reset by peer" error. I checked the machine and made sure everything was "normal;" e.g., checked ssh config for the port change (correct), doubled-checked ufw to make sure the port was open (it was), etc. I ran nmap on the machine and it said the port was open. This morning when I arrived at work, I ran nmap on my machine here where I've been unable to connect and its results were a little surprising: the port I specified at home and was demonstrated as open is not. WTF?
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Feb 20, 2010
I'm using a Debian servers, as router/firwall.. I've two ethernet interfaces into the server, one for wan and one for lan. The i use SNAT so my LAN clients can access the internet throgh the debian router. That is working... Now i want to be able to access servers on the LAN site from the WAN site, and i wanna use port address translation (PAT). I have a FTP server running on a lan server, so i'm trying to portward port 21.
iptables -t nat -A PREROUTING -p tcp -i eth1 -d (WANIP) --dport 21 -j DNAT --to 192.168.1.2:21
When people try to access my FTP from the WAN site, they are redirected to the local FTP server, and they are promted for crendentials, but when the credentials are typed, and the local ftp server should answer the wan request, the connections dies.
The wan clients are being promted for credentials, so they are redirected to the local lan server, but after that the connections dies, so i think there is some kind of nat problem, when the local lan server is trying to respond to the wan request..
Here i my iptables script:
#flush table
iptables -F
#input regler
[code]....
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Feb 12, 2009
I make an application on GNU/Linux which listening on a MULTICAST stream, so I open my unconnected socket, bind it on a MULTICAST address and a port, join the multicast group with the "setsockopt (IP_ADD_MEMBERSHIP)", then I receive datagram on my socket.
Now I've two different instances of the same application that run with their own MULTICAST address and port. And what I found strange is that, after a misconfiguration, I switch the ports, for example:
Emitting on 225.0.0.1/23451 and 225.0.0.2/23452
Receiving on 225.0.0.1/23452 and 225.0.0.2/23451
And my receiving part doesn't care about the MULTICAST address, it looks like the socket is listening on the port number only! I mean that the receiver [225.0.0.1/23452] take its datagrams from emitter [225.0.0.2/23452] and vice-versa!
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Mar 13, 2010
I can't seem to get on my Twinkle SIP Phone, it says: "Failed to create a UDP Socket (SIP) on port 5060 Address already in use" after that message it brings me back to the window were I'm supposed to run my profile, how do I fix this?
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Apr 25, 2009
How can i redirect data received on a port to another port located in a different machine? Can i do this using IPTABLES ?
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