Ubuntu Servers :: Just Installed Ubuntu 9.10 - But Port 80 Blocked - Can Not Find Server/location
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?
VERY new to linux, erm but I have an issue that needs solving!I recently moved to university, where their network blocks sftp port 22, this means that I cannot connect to my FTP server which is running a version of linux.Now I've got this ftp server connected to a seedbox and it was created using the following walk through..Code:I have written this guide for a friend, but I though it would be useful for others as well.
There are several guides floating around, but I found that most always cock up in some way. This one is tried and tested to work on Debian Etch (on an OVH rps, but should apply to most servers).If there is a new stable release of rtorrent/libtorrent then I will update this guide to show you how to update it (without reinstalling the whole server).
At the bottom there are also instructions to install ftp access & some network monitoring software.Basically, I would really like someone to be able to construct the commands on how to change the listen port for sftp connection on linux or add another port to the list that Linux would use so that I could put in through putty.
Strange issue here when trying to verify firewall on Server 8.04. No ftp service running at all on server, but both nmap and netcat report port 21 as being open, even though it isn't.I am 100% sure that port 21 is not actually accessible and iptables rules are fine. Trying to connect to the port fails, yet nmap and netcat seem to report a "false positive"?Have also checked on a number of other servers I'm running, and this "false positive" seems to apply to all of them.
I have a fresh installation of CentOS 5 I'm using for a server, and I'm having issues with port configuration. I have iptables running, and it started with no /etc/sysconfig/iptables file. I added a few basic rules (port 53, port 10000 for webmin), saved the file, and restarted the service. I tried connecting to webmin, scanned ports, and traffic was blocked. I set iptables to allow all traffic and restarted the service, and it still showed basically every port as being blocked. It seems port 80 and port 22 work for some reason, even when I tell iptables to block all ports.
I'm not sure what's going on here. Iptables is reading the /etc/sysconfig/iptables file, and if I use lynx localhost:someport it responds as it should according to the file. However, if I try connecting by IP, it's like there's some other firewall or something running that does whatever it's configured to do.....
I have a mail server on which I would like to block port 25 on my eth0 for everyone except our external spam filter. the problem is that I want our users to be able to connect via port 10025 which is forwarded to port 25, which then is blocked...
I have an Ubuntu 11.04 server with lighttpd installed as my web server. It was working fine, but now when I restart it it gives me the following error...
"can't bind to port: 80 Address already in use"
Is there a way for me to find out what is using port 80 in it's place?
So I set up an Ubuntu 10.04 server with apache2 installed, but for some reason I can't get to it from my browser. the iptables have all changed directories in 10.04 so I can't find the iptables. Apparmor wasn't the problem. The network hard ware is not the problem.There is something inside of 10.04 that is blocking port 80. I can ping it all day using the ip address but when I ping it useing http://ipaddress it can't find the host
So I have two ssh servers I connect to regularly that do not use the standard port 22, so I use the "-p" flag to connect to them. This works flawlessly EVERYWHERE except on my girlfriend's work network. When I am on that network (same laptop), I can ssh into servers which use port 22, but not the other servers on this alternate port.Is there any way OTHER than ssh'ing into a machine I can access and then ssh'ing again from there to my destination (which, by the way, does work)? I want to make a direct connection for speed and security reasons.
I can't seem to establish a conncction to my site (that I'm hosting in the same computer as the gFTP client- running Lucid Lynx desktop as a server). My site is 'out there', with a domain etc. and also I work on it with localhost. I wanted to use ftp as Joomla has a 'ftp layer' for files permissions etc. But it keeps saying that I can't connect, or the connection 'was reset by a peer' whatever that means. For 'hostname' I use site.com (site is my site's name) and even tried the whole thing like http://www.site.com (I clicke on 'connect to remote, and enter that in the url). or just put it where 'host' goes (when I'm not using localhost) For user name and pass, I just enter what I usually put to access the administrator's back panel in joomla, but maybe I am supposed to use what I use to log on to ubuntu when I start my computer? note sure. Anyway I used a telnet command in the terminal and found that port 21 was blocked. MY isp says they don't block any ports so I don't know. I was able to do this last year so I don't know what is so hard about this lol In the router, I have 'ftp 21 to 21 and ip address 192.168.1.100 (ip is the same for http which is working as I have my site up) now it seems to be open as I used a command at the terminal (found from google). It's open but my ftp still can't connect to my server either localhost or to my site. there is no firewall blocking it and I think my router is set right.
While configuring the yum through proxy i was configures with some address(10.x.x.x). after the proxy address has been changed(172.x.x.x).according to new proxy address i made changes in all locations in my system. but when i am trying to download through command line still it is trying to connect old proxy address(10.x.x.x). finally i come to know that, still some location old proxy address(10.x.x.x).is there. how to troubleshoot this issue.(how to find the location) i was try to debug find the output below
I have a vps server running certain services which can be accessed via a web browser (e.g webmin control panel), but I have recently been unable to access these services from my home machine using Firefox 5.0, running ubuntu 11.04.
Example:
I can access the server on port 80 fine, eg: [URL]
However I cannot access my webmin control panel on: [URL]
The pages takes ages to load and then times out. Same with transmission-daemon on: [URL]
Everything is set up fine on my server, the ports are open in firewall etc. and I can access these pages fine from my work computer.
This has only started happening in the last day or two and had been working fine up till then. I have not messed around at all with the firewall on my home machine. I have tried other browsers besides Firefox with same result.
Last night I installed all the updates that were available for CentOS. Today, I discovered that all connections to port 25 (Sendmail) are being blocked except connections coming from localhost.
I tried disabling the firewall to see if anything would change but it is still blocked.
If it is not the firewall doing the blocking, what else might it be?
Recently I discovered that we were accidentally running a POP server (port 110), when we only should have been running the encrypted version thereof (port 995). This wouldn't have been a problem if the port was blocked in the first place.Isn't the default iptables setup on CentOS to block unspecified ports? Specifically, this line from /etc/sysconfig/iptables
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
Right? Well, this doesn't seem to be working for me. I added some rules to allow additional ports and commented out a couple (crucially port 110), but for some reason, port 110 is open.Here is /etc/sysconfig/iptables and the output of iptables -L below that:
# cat /etc/sysconfig/iptables # Firewall configuration written by system-config-securitylevel # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0]
[code]....
Why isn't "-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited" doing what I think it should be doing?
I've got a Fedora postfix server that I just upgraded from 9 to 10 using preupgrade. Starting yesterday, some messages were rejected by servers because the IP address had a poor "reputation". The odd thing is, the IP address they're registering isn't the IP address the server is sending from.
When I look at the full headers of our outgoing e-mail, the e-mail is listed as coming from ***.***.***.11, which is the correct address. But these services are somehow tying the e-mails back to ***.***.***.12, which is used for a different purpose entirely. Since this *.12 address doesn't match the MX record, I'm assuming that's why the mails are being blocked, but I'm not sure how the mails are being identified as coming from that address in the first place. It's odd that this just started when I upgraded.
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.
I need to make some configuration changes to an ftp server running on Ubuntu server 10.04. I don't know which ftp server program is installed, so I don't know where to look for the config files. I know that some server is installed because I can connect to it
How can I determine which ftp server is installed?
I want to run these services on these ports:- ssh:8080- shellinabox:80- squirrelmail via apache2 and SSL:443These appear to be the only ports I can generally connect to through various firewalls I encounter. If I try to get apache2 to not run on 80 shellinxabox appears to bind to it ok, but when I visit my site at port 80 via firefox I get apache instead. 1) How do I stop this and get shellinabox and apache2 working at the same time?2) How do I find another free port that isn't firewalled? All I have been trying is starting shellinabox on various ports and trying to connect and this is a very slow process
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?
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?
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"
My IP has been blocked by Composite Blocking List for " IP Address 207 is listed in the CBL. It appears to be infected with a spam sending trojan or proxy. It was last detected at 2011-01-02 11:00 GMT (+/- 30 minutes), approximately 1 days, 3 hours, 29 minutes ago. It has been relisted following a previous removal at 2010-12-30 17:15 GMT (3 days, 21 hours, 2 minutes ago)"
How do I find this "trojan" and remove it???? I have a network of 6 computers right now, 5 are running Ubuntu (3 server and 2 Desktop versions) and one windows computer. I have run a virus scan in the windows computer and found nothing. How can I scan a linux computer for a virus?
I've just setup a new Ubuntu Server 10.10 serving SVN through Apache (HTTP, HTTPS).It seems all ports are open by default on this new server. Why is this? Do I need to lock it down with iptables, or is it secure as it is anyway (somehow)?
im totally rubbish at command line. I have a small business server for home use, thats where i work from. I have Windows Small Business Server but a lot of the time its crap and am trying Linux. I have Ubuntu 10.10 installed on a desktop and while im new to it im very impressed. I also have a MAC and i must say id rather have Ubuntu.
Now i want to use Linux Server but its all command line and i want the GUI. Iv tried to do this on Ubuntu Server 9.04 and no sucess at all , iv followed the instructions from other posts, (1) sudo apt-get update, (2) sudo apt-get install ubuntu-desktop and nothing works. Is there a way to install the GUI or is there a Linux Server with the GUI pre-installed?
