Ubuntu Servers :: Cannot Connect To Server Via WAN On Any Port?
May 15, 2010
when i fisrt signed up for this forums i accidently posted this same topic in the first place i found apropriate(network/wirless) and i just realised i didn't look hard enough so i marked my old post as solved, please admin delete that one. ubuntu server 10.04 LTS running ubuntu desktop on top(for my lack of skill)ok nitty-gritty. i have been learning to use linux for a few months now and i like it but i cannot access my server through WAN on any ports, yes i have them all open and enabled and associated on my router properly. i even tryed turning off firewall on here and i have tryed a list of misc. things. is there something i am not doing that one might initialy do when first starting an ubuntu server?
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Jan 7, 2011
I am merely trying to change the port for my ssh server.However it isn't changing.I edited my ssh_config file to:
Code:
# This is the ssh client system-wide configuration file. See
# ssh_config(5) for more information. This file provides defaults for[code]...
When i try to connect to my server via port 443 i get a connection refused error. However when i try to connect via port 22 it connects. Since that didn't work, i tried restarting the entire server.To restate, i changed the config file and restarted ssh then the computer, however the port didn't change.Ohh and yes my router is set to port forwarding on port 443, though it doesn't matter since I'm inside the network.
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Mar 4, 2011
I changed the default port under etc/apache2/ports.conf and now I cannot connect to my server under my local network.
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Jan 29, 2011
I'm a NOOB setting up Postfix but managed quite well by following the Ubuntu Server guide. I have managed to set it up using SSL but testing a mail client like thunderbird I can also connect to port 25 using no authentication. Connecting using SSL on port 465 by editing "master.cf" file works but 25 i still open.
1. How do I prevent clients to connect to port 25 without authentication?
2. I guess I have to have port 25 open in order to receive mail from the outside world?
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Sep 21, 2010
Wow, don't know why I seem to have so much trouble with this ftp stuff. I have so start all over a few times, reinstalling Lucid Lynx destop all over, and adding the needed files to make it a server. I am just trying to do something simple for now- just having a localhost server environment to develop my joomla website, and later on host it from my server 'out there' (I already have a domain name and dynDNS service with nameservers etc. but don't want to do that yet, as I have in the past with my router forwarding port 80, and actually got hacked! so I don't want to do that again until I learn more about security) My problem right now is that I can't even get the localhost ftp to 'connect to the server'. i know the host name (localhost) and username/password that I set when I set up Lucid Lynx, and I'm sure that is what I use for the ftp usernamepassword, host etc. And I put port 21 for the port. I see from 'Shields Up' that my port 21 is closed. So I followed advice on a thread and entered a few commands in the terminal to ad iptables etc. But still, port 21 is closed and I can't install components with the Joomla installer in admin's backend. And I can't use fireftp to even change permissions in my local folders. What do i do next, open port 21 somehow? I saw a terminal command about opening port 21 that was simple but I forget it.
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Jul 28, 2011
I am trying to connect to my linux server using an SCP Key (PPK), but I can't get through using Putty, WinSCP, etc. I think Port 22 might not be open, but I don't know how to open it if I can't at least access the server using SSH.
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Dec 13, 2010
We have a Ubuntu system that is connected to 4 different networks.
Code:
eth0: 192.168.12.9
eth1: 192.168.2.142
[code]....
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Aug 1, 2009
I have 2 server behind the netgear router on my network . win2k3 and CentOS development server, I have port forarded 80 to win2k3 server which i can access over the internet and is accessable. However I can SSH CentOS machine and portforwarded 8080 and 82 for web access, I can't access via any of the port, browsers says UNABLE TO CONNECT.. there is no firewall in CentOS machine.
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Apr 27, 2011
I'm trying to open up some ports to connect via vnc to a server running Centos 5.5. I've edited /etc/sysconfig/iptables everything *looks* fine, but I still can't seem to get access to the port I've opened (I added some newlines for clarity between commands):
[Code]....
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Apr 6, 2010
How can I set my server to listen at a different port for http access. I would like to use port 8080 (to circumnavigate isp blocks). Also can I do the same thing for sftp connections?
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Mar 10, 2010
i need to change ssh port on the servers including centos and ubuntu when i make changes to /etc/ssh/sshd.config and change the port to something else restart sshd then i can determine that port 22 is not working but ssh does not connect to new port it says "no route to the host"
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May 26, 2010
I've been trying to ssh out of my home network to school computers and I keep getting:
ssh: connect to host sage.math.washington.edu port 22: Connection timed out
I've tried this on my machine (running Ubuntu 10.04) and on a windows 7 machine (using putty). I have been successful ssh'ing to this machine using either of the laptops from every other network I've tried, so I'm pretty sure it's something about my home network.
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May 2, 2010
I have a mail server i need it to send message via port 587 not port 25, i make some changes to my postfix server which i use and it is already successed making a telnet to 587 port like it :
[Code]....
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Jul 13, 2010
when I am run:
ssh -v "login"@"server"
I get:
OpenSSH_5.3p1 Debian-3ubuntu4, OpenSSL 0.9.8k 25 Mar 2009
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to server ["address"] port 22.
debug1: connect to address "address" port 22: Connection timed out
ssh: connect to host "server" port 22: Connection timed out
I suppose this is because I am connecting from a public institute where there is a firewall that is blocking an outbound connection on port 22.Is there anyway I can bypass the firewall using the internet ?
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Jul 23, 2010
Right now I have a machine set up running Fedora. I have configured inittab to accept Console Logins, but I am having problems getting my netbook running PuTTY to connect. How would I go about finding the Host Name and Port to connect to?
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Feb 7, 2010
I have openssh installed and it works great right out of the box. However, I don't want people accessing everything on my machine. My machine is behind NAT and ufw firewall. I have configured both so that port 22 is open. I've added the new users I want to have limited access and assigned them to group "sambashare" (just because its convenient.)
When the bottom bit of my config file "/etc/ssh/sshd_config" is set as shown below, everything works great:
Quote:
#Subsystem sftp /usr/lib/openssh/sftp-server
Subsystem sftp internal-sftp
UsePAM yes
Match Group sambashare
[code]...
Whenever I make the change to enable "ChrootDirectory" so that it limits the users access, I simply remove the # and it looks like this:
Quote:
#Subsystem sftp /usr/lib/openssh/sftp-server
Subsystem sftp internal-sftp
UsePAM yes
Match Group sambashare
[code]...
However, thats when I start running into problems. When I try logging in with Filezilla; I am not able to connect and this is the response I get from Filezilla:
Quote:
Status: Connecting to ##.###.###.###...
Response: fzSftp started
Command: open "user@##.###.###.###" 22
[code]....
Error: Could not connect to server
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Apr 30, 2010
My school are cutting costs.I suggested they go open source.They said if I could find out how then they would consider it.Basically they want a mixture of windows and ubuntu clients.What I would like to no is how a ubuntu machine can connect to a server (SAMBA I think) so that it can access our home folder like the windows machines do.
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Jun 24, 2010
Does anyone know, or have any experience with, what the best way to set a network interface on a linux server to be up - so that virtual machines can bridge through the physical interface, but not allow anyone on a network to connect to the server itself? Thank you
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Jul 16, 2010
I just set up my first server in my home with Ubuntu Server Edition, and I'm in the process of installing Jinzora on it. However, I cannot access the server through my web browser like I believe I should.Is it not just URL...?I am very much a server newbie, do I need to install another application to view my server in a web browser? I am able to connect through SSH just fine.
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Nov 19, 2010
I've looked everywhere for this (simple) problem, and I can't get this working. I have a mysql server on my LAN which is accessible from within the server.I want to access the mysql server from another computer on the LAN, but it never works.
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Feb 17, 2011
I setup Ubuntu 10.10 (edubuntu) along with ltsp. I have an environment with a windows network (192.168.1.0) and a subnet (192.168.0.0) that the new terminal server is on. Everything seemed to be connecting properly, but when I attempted to boot the first client, I get the error message: "Cannot connect to NBD server".
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Apr 12, 2010
I installed Ubuntu 9.10 and tomcat 6 java servlet container. I am trying to run the tomcat server on port 80, so I edited tomcat's configuration file (server.xml) and changed the default port from "8080" to "80". I launched tomcat server, went to my browser and entered:[url], but it says can not find server/location. Then I edit the server.xml and revert back to port "8080" and then enter: [url] and everything works fine. So my guess is some other service is taking up port 80, but I would think not, since I just installed Ubuntu and made sure apache isn't installed or running.
So I went to "System" --> "Administration", then choose "Network Tools". I then executed Netstat and did not see anything taking up port 80, but I do see port 8080 taken (assuming it is the tomcat server). Then I also did a Port Scan and entered my IP number. Again, I don't see port 80 taken, but do see 8080 being used.
I had a winxp laptop computer behind home wireless and was running tomcat 6 server fine with it, but it over-heated and died recently. So I got a used laptop and just installed Ubuntu 9.10. I have not changed my wireless router settings. It is the same as before. So I have ruled out my home's hardware/network equipment.
So here now I sit, wondering what is up?
For security reasons, is port 80 initially blocked by Ubuntu for some reason? Is there something I have to do beforehand to free up port 80?
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Apr 17, 2010
i tried installing irssi a few months ago but got this error after messing around with some configurations.(was trying to get it to auto connect to a channel when i loaded it up) i have recently come back to it, deleted all the files and re-installed it but im getting the same error again and i haven't touched the config stuff this time.. should be a clean install.
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Feb 9, 2010
i have been havin a little trouble with my ftp server im using proftpd and have been able to connect to the box on local lan but it stops with an error about tls packet.
i have been following a guide on settin up my server [URL]...and have attached my config and error details
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Apr 22, 2010
What type of server am I on? code...
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May 29, 2010
I just made a Ubuntu Server install in a virtual machine and am having trouble setting up FTP to transfer files. I've installed LAMP and vsftp. The web server works great, but FTP gives a connection refused error locally and remotely from the host machine. 'Connection attempt failed with "ECONNREFUSED - Connection refused by server".' nmap localhost doesn't list FTP as open even though I have vsftpd set to listen. I've tried restarting vsftpd with no luck.
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Sep 26, 2010
I have a virtual private server that I am trying to connect to using x11vnc. I ran this through ssh to setup gnome
sudo apt-get install gnome-core
sudo apt-get install gdm
sudo /etc/init.d/gdm start
sudo dpkg-reconfigure xserver-xorg
I later ran sudo apt-get install ubuntu-desktop to see if that would help.
Code:
#cat /etc/issue
Ubuntu 10.04.1 LTS
l
Code:
#sudo startx
Fatal server error:
xf860OpenConsole: Cannot open /dev/tty0 (No such file or directory)
I assume this is because it probably doesn't have a video card.
[Code]...
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Nov 19, 2010
I followed this tutorial:
http://www.howtoforge.com/virtual-us...l-ubuntu-10.04
Minus the Quota for the mailboxes, since I don't really care about that. But I don't think that should cause any problems in the configuration.
The server is in my local network.
I tried to connect with Thunderbird and Kmail. Kmal brings up an error message eventually, saying something about a time-out.
Squirrelmail says code...
I searched everything & everywhere only to see that more people have that same error message come up with Squirrelmail. From my understanding some have fixed the issue but I couldn't actually find a solution to this.
Does anyone know how to fix this?
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Feb 15, 2011
I am trying to setup a mumble server on Ubuntu Server 10.10. I have downloaded/installed all of the necessary files and configured my router to open up the necessary port (64738 ). However users outside of my network are unable to connect to the server (get Timeout error). Also to add, I am fairly new to using linux/ubuntu.I made a post on reddit where you will find more information regarding my problem: [URL]
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Sep 15, 2010
i can't connect to my server using putty.
I have a virtual dedicated server, running - Linux Red Hat Fidora core 6- Pentium 4, 3ghz
I'm attempting to use Putty to log in SSH, but I'm getting an error.
Saying the sever unexpectedly close network connection.
I don't know if this has anything to do with it. This is a new computer, that hasn't logged in using putty before. Also I'm on a home wireless network. It dosen't seem to be a firewall issue, the error message pops up, when the firewall is disabled.
And I just had Go Daddy do a reboot. Oh, and I think I might have entered my password incorrectly a few times, last night.
I remember the Go Daddy rep, saying that my IP address may be flagged, but that it would unfilter and unlock it self within an hour or so. It's been over 24 hrs.
Before the password issue, i was able to log in.. But i can't now.
Others can log in. So there unable to duplicate the problem.
I'm new to Linux, and SSH.
Any help
I'm trying to install some software...
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