Networking :: Enable A Client To Port Forward Through VPS?

Jul 27, 2011

Well I have been searching for more than a month now and I think I have read every single post related to this subject and finally decided to make a thread.

Now before I begin I am running Openvpn on my CentOS VPS. I have set static IP's for everyone.

Now what I am looking for is this lets say one of my clients wants port 60005 forwarded through my VPS to the internet what are the correct commands to run.

server-ip:60005 to loacl-ip:60005
Sever IP 24.xx.xx.xx
Client IP

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General :: Setup A Port Forward From Client Computer's Shell?

Mar 24, 2011

I notice that my bittorrent client is capable of automatically setting up port forwards with my router, and I want to know if I can do the same in a shell script. The reason is, that since my router is stupid and won't let me keep static IP addresses (it seems they forced a DHCP refresh every week to make me want to pay for a more expensive model which doesn't), I need to get my computer to change the port forward to follow my computer's changing internal network IP address. I have a couple of port forward manually entered into my router settings for web interfaces to bittorrent etc, but of course these have a good chance of being invalidated at each DHCP refresh cycle.

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Networking :: Use Iptables In Order To Forward All The Incoming Packets For Port 5555 To Port 5556?

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 (

I wrote the following commands:

iptables -A PREROUTING -t nat -i any -p tcp --dport 5555 -j DNAT --to
iptables -A FORWARD -p tcp -m state --state NEW -d --dport 5556 -j ACCEPT

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Networking :: Iptables Can't Port Forward (PAT Port Address Translation)?

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

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


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Fedora Networking :: How To Forward A Port Using Iptables

May 7, 2009

I need to forward a port to use dtella. I'm using Fedora 10, using iptables for my firewall.

I'm currently trying to forward it from terminal with this command:

sudo iptables -t nat -A PREROUTING -p udp -i eth0 -d [ip address] --dport 11823 -j DNAT --to
this is what I get from iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED


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Networking :: Iptables Forward Port To Another Host?

Nov 15, 2010

Lets say i have two machines on public ips. If i get incoming traffic on machine #1 on port 55242 i would just like to forward it to machine #2 on port 35000.I would just like to use machine #1 same way as a dns server works. It just redirects the traffic and tells the client where to go.

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Ubuntu Networking :: How To Port Forward Form One Device To Another

Apr 1, 2010

I have a host and a client both running linux. Host has internet through eth2. Client needs to share that connection. The computers are connected directly using a crossover. I can ping from both fine. I figured I needed to port forward eth2 to eth0 to gain internet access in the client. How?


eth0 Link encap:Ethernet HWaddr 00:26:18:a6:fd:a3
inet addr: Bcast: Mask:
inet6 addr: fe80::226:18ff:fea6:fda3/64 Scope:Link


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Networking :: Unable To Port Forward To Ftp Behind My Firewall / Solve This?

Sep 28, 2010

I can't port forward to ftp behind my firewall, I tried several attempts but none worked.

Can anyone help me solve this?

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Networking :: Transmission Bittorrent Config - Forward TCP And UDP Port 51413 To Server

Nov 23, 2010

I have just set up the transmission bittorrent client on my server (using the web interface), and am trying to get the port forwarding right. After noticing low download speeds (and rare uploading), I decided to check if a port needed to be forwarded.

I found many conflicting sites, mentioning both the ranges 6881-6999 and the port 51413 (as well as TCP and UDP versus just TCP). My current configuration is to forward TCP and UDP port 51413 to my server.

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Server :: If Forward A Port In Iptables, Does The Port Have To Be Open On The Firewall

Aug 5, 2009

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?

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Networking :: How To Enable Or Open Port In The Iptables

Sep 21, 2010

how do i enable or open port in the iptables

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Ubuntu Networking :: Unable To Connect To Port / Enable This?

Mar 22, 2011

I have setup an OpenVPN server on my server box, it had been working perfectly until today. It operates on port 1194 which I am now unable to connect to (tried telnet). I have checked all the firewall rules and they still allow the port and I have also checked to ensure that OpenVPN is still listening to the port, which it's not but I have tried restarting the service and the box which dosent make any difference. The only thing that has changed is that yesterday I installed Openfire, could this have broken something?

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Ubuntu Networking :: Port Forwarding To VPN Client (kvpnc)

Mar 9, 2010

I set up an ssh server and configured port forwarding on my router so that I can access the ssh server from the internet. This is working fine, also from within the LAN.

Additionally this machine should be connected to an VPN Server on the internet. Again, this is working. I get connected, the tun interface is coming up, etc.

The moment the VPN Connection is established I can not connect to the SSH Server anymore from the internet, LAN ist still working fine. I guess it has something to do with the route that is set by the VPN Connection?!

So my question is, what do I have to do to reach the ssh server from the internet while the ssh server is connected to an VPN Server itself.

ifconfig without VPN

eth0 Link encap:Ethernet HWaddr 00:1c:c0:c4:df:80
inet addr: Bcast: Mask:
inet6 addr: fe80::21c:c0ff:fec4:df80/64 Scope:Link


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Ubuntu Networking :: Enable Port Forwarding So Can Use Computer As A FTP Server?

Oct 3, 2010

I'm trying to enable port forwarding so I can use my computer as an FTP server to some friends. Here's my setup:

CLEAR wireless modem <--> LAN port 4 on router (not WAN) and LAN port 1 on router <---> eth0 in Ubuntu 9.10

The modem acts as a DHCP server which successfully assigns an IP address to my desktop system. I can also go onto the internet just fine on my desktop, and any other computer that connects to the router.

I have enabled port forwarding on the modem (not the router because it's being used as a switch, and not using its WAN port) to forward ports 21 and 80 to my desktop. What I don't understand, though, is that when I try to FTP to the modem's WAN IP address, the connection is refused. However, when I use websites such as:

They say ports 21 and 80 are open (and not other random ports like 22 or 23 which I tried to see if the site simply said everything was open) but I cannot access my site from a web browser.

I was wondering what it was that's stopping computers from the Internet from communicating with my computer? The modem? The router? Configs?

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Ubuntu Networking :: NX Client - Ssh: Connect To Host Port 22: Connection?

Jul 29, 2010

I have a Windows machine on which NX Client has been installed. I wanted to test if I could access my Ubuntu box. The Ubuntu Box has NX Server, Node and Client installed. When I try to log in from the Windows machine using NX Client with my Ubuntu username and password I get an error connection refused.

The following service is running: OpenBSD Secure Shell server sshd How can I resolve the issue?

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Ubuntu Networking :: Sftp Client For Redirected Ssh To Port 2222?

Apr 7, 2011

I have remote server and when I want to connect to it from internet I need to choose port 2222. I tryed to do it using filezilla, gftp, it can be done. Because they want from me to use default ssh port 22

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Networking :: Port Forwarding In Bittorrent Client In Internal Network With Nat

Apr 9, 2010

I have an internal network behind a server <> connected to the internet that NATs my ip <> only. NAT is not allowed to any other ip addresses. When I use Transmission Bittorrent client to download torrents, The thing is that this is not my machine and doesn't have access to the internet at all. What is happening here? Can anyone help me?

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Networking :: Unable To Ping Host From OpenVPN Client After Port 22 Denied

Mar 28, 2010

After I applied below iptables rule.. I am unable to ping the host in from OpenVPN client

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Ubuntu :: How To Port Forward

Apr 29, 2010

I tried following the instructions below but I don't see the "Automatically map port" option. What am I missing here??[URL]

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CentOS 5 Networking :: Can't Telnet Localhost 1812 (radius Sever Port) / Enable This?

Sep 25, 2009

I have opened/added the ports 1812 and 1813 (both tcp & udp) for radius server in the firewall.

when i use the command : telnet localhost 1812 , the connection says "refused", i get the following messages code...

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Ubuntu :: Possible To Port Forward Firefox?

Jan 22, 2010

I'd really like to know how to port forward firefox, so I can browse and stream my movies faster... is this possible?

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Slackware :: Forward RDP Port With In Iptables?

May 4, 2010

I`m running a rather simple iptables script, but no matter what port i try to forward it wont open. Here are the basics:

$ipt -F


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OpenSUSE Network :: Unreachable, Even With The IP Forward Enable?

Mar 25, 2010

I have one server with 4 network interfaces:

eth0: - local lan A
eth1: - internet link - default route
eth2: - local lan B eth3: - local lan C
Lan A - Default routing to eth0
Lan B - Default routing to eth2
Lan c - Default routing to another server but the workstations has static routing to this server too.

Everything is working fine on Opensuse 11.1 until I upgrade this sever to Opensuse 11.2 ( Reinstall, not update at all ). After upgrade to 11.2 the routing across local lan interfaces simply not work, if you try to ping lan-to-lan you got the message: Network unreachable, even with the IP Forward enable, but the default route is working fine trough the SNAT.

I've come back to Opensuse 11.1 and everything become normal, does anyone have an problem like this? Maybe a bug? PS: I do not try to disable the AppArmor, next weekend I will try Opensuse 11.2 without the AppArmor and post here anyway.

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General :: Forward The Port (22) Through Router For Server - Ssh

Feb 9, 2011

Just setup an ssh server...kinda. I need to forward the port (22) through my router. I have forwarded ports before for programs so the whole thing isnt a mystery. But i need to know what to put in for a couple boxes.... Private ip: ? protocol type: tcp, udp, or both?

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Ubuntu Servers :: Apache2 SSL Forward To Another Port?

Dec 1, 2010

I have an apache2 server on a Debian box that I am using as the reverse proxy for my sites that are sitting behind it and everyone is happy. But now I want to be able to access my vmware server console from outside the network without exposing the vmware server port to the internet. So I did this I created a new virtual host for apache and it looks like this (edited for the real world)

<VirtualHost *:80>
# RewriteLog "/var/log/apache2/rewrite.log"
# RewriteLogLevel 9


So here is what I want to be able to do. I want to be able to punch in [URL] and have the reverse proxy just take care of everything else without having to punch in the port number or anything else. I'd also like to have if possible the ssl on the vmware box just pass through the proxy back to the end user. If that isn't possible and I need to create a new ssl for the apache box then that is ok too. I have googled this and looked at several other sites but I'm still a little bit lost.

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Ubuntu :: Transmission Port Forward / Internet Slowed Down

May 16, 2010

While I have Transmission running, whether it be up/downloading or just open with one thing unpaused and no activity, all other computer functions that need internet access are unusable. Transmission says my port is closed in its preferences.

1. How do I find and open port?
2. Will finding an open port solve the problem of all things internet not working while Transmission is?
3. Do I need to create a static ip in order to forward a port through my router?
4. Will creating a static ip and forwarding that port solve my problem of only being able to use the internet while Transmission is on?

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Fedora :: Is There Any Player To Play SWF File Enable Forward And Rewind?

Dec 10, 2010

I've tried the Browser,Unfortunately,both the Firefox and Chrome do not support the function forward and rewind.

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General :: Forward Port For IP-Based Virtual Host To Work?

Mar 22, 2010

Having trouble visualising how IP-Based Virtual Host (with SSL) would work. Here is my vhosts.conf file:

#Define Name Virtal Host
#Used to replace the main server host. The log file will reside in /var/log/httpd/error_log


How will it work? I will need to forward port 443 to the interface right? Without doing that, there is no way this is going to work... is there? And that means that I can't run more than 1 ip-based SSL virtual host on one machine because I can't forward 443 to two different interfaces.

Also, do I use internal ip address or external ip address in the <VirtualHost > tag? I only have one static public ip.

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Ubuntu Multimedia :: Unable To Fast Forward Audio File / Enable This?

Jan 4, 2010

Just did a fresh install of Karmic, got all necessary decoders installed for video and audio playback...I think.

Problem is I can't forward/search in audio files I am playing. I mean I can only Play, Pause, Stop or "Next-track" a music file. Video files are fine.

I've tried Exaile, Rythmbox and even Totem. It is like the audio files are "half read-only".

If I drag a horizontal scroller in the music player and let it go, it will only jump back to the position where it is actually playing.

Has anyone experienced, this? I am a missing something in gstreamer or something like it?

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Fedora Servers :: Port Forward On The Fly Or At Startup With Virt Machine Manager And Kvm-qemu?

Jan 6, 2010

I'm running some vm's in FC12 with kvm-qemu and using virt machine manager. I'd like to have some ports automatically forward on startup and be able to add redirections on the fly. Redirection on the fly is talked about here, but I am getting lost on what should be basic instructions.[URL]

As far as startup, In the past I just ran qemu from the cli and manually specified redirection with redir. I can't figure out how to do it with The virt machine manager which I am using to start my VM's now. I do not want the guests to see the host. From cli startup without virt machine manager, it looked like this: qemu -m 256 -hda vm.img -redir tcp:5555::80 -redir tcp:5556::445 &

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