Ubuntu Networking :: Can't Open OpenVPN Port 1194?
Nov 17, 2010
So, I've installed and configured OpenVPN on Ubuntu server 10.04, but I can't connect to it. When i try connecting from another ubuntu machine it's "connection attempt timed out" and i can't seem to fix it. I think the problem is that port 1194 (which i've configured openvpn to use) isn't open. I've created iptables rules,Here are the rules:
I've recently installed OpenVPN on my dedicated server (Fedora) in order to have full internet access for all of my WinXP clients. In case somebody is interested in the details of the OpenVPN installation, I followed this documentation: Rootserver-as-OpenVPN-Gateway. The installation runs quire nicely, I'm able to surf the net and even file-sharing programs work on the XP clients - at least to some extent. There is a slight problem though: the file-sharing programs complain that they have a "NAT problem" or that they are "Firewalled".
Most likely, this problem can be addressed by configuring remote port forwarding (RPF) on the server. The only routing rules which I've added on the server during the OpenVPN installation are these: Code: # initialize natting for openvpn iptables -t nat -F POSTROUTING echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -o eth0 -s 10.66.66.0/24 -j MASQUERADE Let's assume a certain application on a client is listening on e.g. port 1234. How do I configure RPF for this port on the server side.
i have some problems with configuring openvpn tunnel connection to my openvpn server. I'm using static-key tcp connection. Network manager always said to me that connection could not be established. Also, when i try to run openvpn from terminal, i got some strange permissions problem:
Code:
openvpn --config config.ovpn Mon Apr 5 15:48:37 2010 OpenVPN 2.1_rc19 i486-pc-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] built on Oct 13 2009 Mon Apr 5 15:48:37 2010 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables Mon Apr 5 15:48:37 2010 /usr/sbin/openvpn-vulnkey -q moj.key
I just installed apache. I didn't change the configuration files at all except add Quote: # added servername to avoid the could not determine fqdn error ServerName myname.homelinux.org to apache2.conf. Apache is working locally (I get the `it's working' screen at [URL]). However, I cannot access my computer from an external computer by going to [URL], which is equivalent to [URL] -- [IP address changed slightly for privacy] Here is a screenshot to my router settings. I disabled the filter for port 80 on the router. here shouldn't be a firewall, unless it's automatically installed with ubuntu 10.4. (sudo ufw status says `inactive'.)
I checked my ports from [URL] and indeed port 22 is open (ssh-ing into my computer externally is not a problem), whereas port 80 is closed. What step in opening up port 80 am I missing? (I also made sure my ISP isn't blocking port 80.)
needing to open a port in ubuntu, then use it for my VirtualBox Pc.My VirtualBox is running - Windows XP I have a router connected to my network - Linksys WRT54G Now lets begin, I have tried opening via there router homepage. But when I go to [URL] and test port 4900 is still says that it is closed.
No matter what I do, i cannot get port 3100 to open. This is for a new MMO i am CBT on. I know it works on windows because that is how I installed it and played. But I prefer being on Linux. Majority of all other MMOs work fine. Just this one has to have udp 3100 open.
The following is a rough output of all the methods I have tried with no success. As you can see I have done some extensive research first before posting here.
Now its become a lil bit of an obsession.
I cannot get the following command to work:
And yes I tried the "spaces" in different places thinking that was the prob. So i cannot see if 3100 is in the list or not
I eventually turned on the firewall "ufw enable" add the port there, and output:
Some references
[url]
Firewall stuff: [url]
I even manually went into the router and turned it on there.
I have an n900 phone and I'm trying to ssh to my desktop but I'm getting an error:
ssh: connect to host 58.xx.xx.xx port 22: Connection refused
I recently started using a router for I wanted to connect to net even with n900. I've tried to open the port from the setup page of the router however it doesn't seem to work. (find below the screenshot of setup page).
I've tried to ssh through slackware I've got as a virtual machine and I have the same problem although I was able to ssh through slackware before I started using the router.
I found that I can not use the UDP port on FC 12.I new install one FC 12 , but when I use the next command nmap -sU localhost.I found all udp port has been filtered.I don't know how to open the udp ports . for I need use some udp port.I use iptables , but not working. Why ?
I would like to test myself if port 5060 is open for UDP packets.
I got a few shell accounts outside of my ISP that run Linux or different BSDs. Does someone know a common program where I could send UDP packets to port 5060 of the IP address that Virginmedia assigns to me and then I would need a program on a PC within my network who reads them _if_ they get through.
Background of all this is that my VOIP phones from two different VOIP providers are offline since last Monday. One service provider confirmed that another VOIP client is online with the same service provider Virginmedia but in a different area.
So, while I don't know how long does it take that someone from Virginmedia can tell me if their port 5060 is open for UDP, I would like to find out myself in the meantime.
I have a problem sending of file attachment using Instant Messengeri have a firewall using firestarter, if i used outside firewall they can able to recieve my file in instant meesenger but if i used firestarter it always cancelled my sending of file attachment....
I am running RHEL 5.3 and attempted to open port 4470 for an application that will use the port. I used the graphical interface to open the port, just as I have for other ports such as 4750.I can telnet to the server with:telnet server 4750
If I try the other port that I'm trying to open:telnet server 4470
I get "Could not open connection to the host, on port 4470: Connect failed."I have restarted the network and iptables services.I have turned off the local firewall and it still did not work.
Transmission says my port is closed. If I google the problem, it just gives me advice on how to open a port in Windows OS. There's no firewall in Ubuntu 10.10 by default, right? There isn't any router used neither. I'm living in a dorm. I just plug the LAN cable in the box fixed to the wall.
I think port 24800 is firewalled in my linux machine. i tried synergy to sue as a server in linux and doesnt work. i tried from the windows computer and works!
So... I telnet (from linux) to an address: telnet 192.168.0.1 24800 and the time is out (so a firewall is blocking this port).
My simple question: How do I open this port so i can get the synergy server in my linux box?
I have a iptable as firewall, I want to open incoming of port 8080 so I use "# Allow forwarding of incoming Port 8080 traffic" but it didn't work? how can I open just incoming of port 8080?
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 been working and researching this for about a week now and I still haven't had any luck. Basically, I have been trying to open port 3306 to allow connections to my MySql server.
i've added the rule into iptables, saved and restarted that i've added the rule into my router. and I have removed "skip-networking" from the my.cnf file and added the blind address in, I'm trying to get this all to work on my LAN, but it doesn't seem to work, I've also restarted the entire server and then port scanned it from outside and inside the networking and it still tells me that 3306 is closed.
I did however i had some luck when I entered the Ip of the machine that would be sending data to the server but then PROFTPD stopped working and the port was open :/ im not really sure what ip should be in there but another thread from another forum said to enter the ip of the machine that mysql is installed on. so currently its 192.168.0.2 which is the static internal address of the server.
every machine on the network has a static ip and all the rules have been added to each firewall, i.e. server and router firewalls.
ill pop my "my.cnf" under this to see if anyone can find a mistake,
Code: # This will be passed to all mysql clients # It has been reported that passwords should be enclosed with ticks/quotes # escpecially if they contain "#" chars... # Remember to edit /etc/mysql/debian.cnf when changing the socket location.
I would like to Close/Open port 21 using command line. I have an FTP server and I don't want to have the port open all the time. I need only two hours by week to be open port 21 from outside to inside.So I need to know the command line for opening and closing the port 21 then I will implement this in a script into cron.hourly.
I am trying to make a vnc connection from pc #2 to pc #1. Pc #1 is a debian pc behind a zyxel router (P-2602HW-D1A). Pc #2 is a windows xp pc another place at the internet.I have configured the zyxel router to forward incomming trafic on port 5902 to the local ip-adress of the debian box. The debian box is running a vnc server, listening on port 5902.But i dosn?t work.I have tryed to scan the zyxel routers ipadress on port 5902 from the internet, but the scanner says that the port is closed.The vnc server on pc #1 is working fine on the local network. I can connect to the server from a pc on the same side of the zyxel router.Is it deffenitly a router problem, or could it have something to do with debians own firewall?
I have set up an openvpn server on ubuntu via port tcp 443. The server use a public network and almost every ports are blocked (not 443) So when a client connect to the server, if it send traffic needing a blocked port, the connection cannot been etablished of course. So i d like to know if it is possible to redirect all incoming traffic on the server to an other unblocked port (like 443) to bypass firewall.
I dont think openvpn offer this possibility but maybe with linux it is possible..
I'm having an issue with ufw and Synergy. I'm trying to run my Xubuntu 10.10 desktop as a server, and my Xubuntu 10.10 laptop as a client. I can do this just fine as long as I either: Have ufw enabled on my client but disabled on my server Have ufw disabled on both my client and my server I have no custom rules added to iptables on my client. On my server, however, I have tried the following rules:
$ ufw allow from 192.168.0.0/24 to any port 24800 $ ufw allow from 192.168.0.0/24
Neither of these configurations works. ufw on my server seems to block my client's requests regardless of having port 24800 fully open from any local connection, or just flat-out fully allowing any incoming local connection. I'm not sure why ufw seems to be ignoring the rules I'm creating, but as it stands right now, the only way I can connect the two is if I have ufw on my server disabled. And I have tried to ping the two machines; each machine can ping the other, even if ufw is running on both.
And I can ping the router, as well, from both machines. Any ideas on where to go from here to troubleshoot? I should probably also add that I am using the same configuration file that I do on vanilla Ubuntu (with updated host names, of course), and I have no problems in Ubuntu. This seems to be specific to ufw and my Xubuntu desktop. I can paste the code for my server's configuration file, if desired.
I configure IPtable on RadHat as firewall and i want to allow for IP Phone using SIP protocol.I already allow port 5060 for IP Phone using SIP Protocol and I can call out.The problem is:
1. I can call out and in but when they pick up my call they hear what i'm saying but i can't hear they are saying.
Here is my network diagram ADSL router----firewall--LAN inside the LAN my squid is running. currently all users are working with out proxy server. I installed the proxy server inside the LAN. now all users can access web browsing ,but no other ports are working , like POP3, smtp, then some other TCP port based applications are not working. My firewall ( juniper) is created and tested the rules to allow the POP3 and smtp and selected poprts which is working , but I redirected through squid proxy server the clients are not able to access. where do I have to create rules?
** in squid proxy( i already did in safe port list stillnot working) ** IP tables?
If I forward port 80 to port 3128 for squid with an iptable rule, does port 3128 have to be open on the firewall or is this all routed behind the firewall?
Our DBA has an application running on Server2 which needs to connect to Server1 (Linux OEL5.5 server) thru port# 9171. I use telnet to test basic connectivity.What should I do on Server1 in order to open up port#9171 for connection.
