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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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 :: Unable To Open Port In Router Or Firewall?

Jan 26, 2010

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?

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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 :: 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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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 :: 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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Networking :: How To Allow A Port In Fedora Firewall

Jan 28, 2010

i have to deal with reverse proxy issue and want to access few LAN devices having port 5900 and 9999, what exact steps i have to follow to allow this port in fedora firewall.

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Networking :: Open Port Behind Firewall?

Sep 3, 2009

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....

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CentOS 5 Networking :: Configure Firewall - Allow And Forward All Traffic On Eth0 And Block All Traffic On Eth1 Except Ssh Ping

Sep 29, 2010

I need to set up my centOS computer as a firewall in my home network. Ive got 2 interfaces, eth0 and eth1. I want to allow and forward all traffic on eth0 and block all traffic on eth1 except ssh, ping(icmp) and DNS. How do I do this? Ive tried some editing in /etc/sysconfig/iptables but no luck.

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Ubuntu Servers :: Firewall / Router Forward Ports

Sep 8, 2010

I have linux server setup on a network with 2 interfaces. One (eth0) is connected to the regular network and the other (eth1) has a DHCP server and transparent web cache listening on it. The machines connected on the eth1 side are on a different subnet and the linux server is there gateway. Untrusted machines are introduced to this network to keep them isolated.

This isolation works well, too well. There are a small set of resources on the regular network I would like to make available to machines on untrustworthy network. I think I need to use iptables but alas I've had no luck in piecing together the command I need (in one case looking myself out and having to physically reset the machine).

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Networking :: Unable To Setup Dsl Connection In KDE Fedora 15 / Solve This?

Jun 19, 2011

I installed the Kde desktop and i'm unable to setup a broadband dsl connection
i have done the settngs in network manager gave password username service name etc.
but the option for connection doesnt appear
the connection works properly in windows as well as gnome 3 desktop but not in kde

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Ubuntu Servers :: Forward Traffic From A Domain To Another Server Behind A Firewall

Jan 29, 2010

I have a server on my router on the DMZ. All outside traffic goes to it. This server has Apache running and the domain resolves to the the DMZ web server. I have a second server on the LAN that also has apache running. I want to set up another domain, to resolve to the second server on the LAN. Since the main server is on DMZ I have the DNS A records for pointing to the public IP that the DMZ is on.

How do I get to resolve to the second webserver on the LAN? What configuration do I need to do on my DMZ server so it routes traffic for to the other server on teh LAN? Do I use BIND DNS? If so please advise on how to set that up. BIND DNS seems confusing and I having trouble knowing how to configuring it. Is there another option besides BIND?

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Ubuntu Networking :: Unable To Connect To Wireless Network / Solve This?

Apr 13, 2010

I have a Dell Inspiron 1525. I am unable to connect to wireless networks. I have a fresh installation of Ubuntu 8.04. I have installed Ndiswrapper (ndiswrapper-utils_1.8-0ubuntu2_i386.deb) and the GUI for ndiswrapper. The ndiwrapper GUI reports that the hardware was not found. Yet I am able to connect to the wlan using Windows.

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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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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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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 Networking :: Firewall Settings : Unable To Configure For Apt-get And Dns?

Mar 28, 2010

I have tried various rules, like opening port 53 for the DNS with little success. I finally figured that you need to set the source port to 53 and NOT the destination port.However, I have been unable to figure out what ports apt-get requires. The only way I get it to work is to accept everything in iptables.

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Networking :: Unable To Ssh Without Dropping Firewall Security On Dsl Modem?

Apr 22, 2011

I have a home network with a linux dhcp server and a couple of clients. The Internet comes from a dsl modem with a different subnet than my wireless router. The network works fine and I have no problems, but I now need to ssh to a work computer and the only way I can do that is if I drop the security in my dsl modem. So I thought all I need to do is use port forwarding on my dsl modem, but it won't let me because it is on a different subnet. I tried putting the dsl modem on the same subnet, but that did not work and made it so I could not access anything.

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General :: Domain Not Listning To Any Port Other Than 80 / Solve It?

Apr 26, 2010

I have one server, in this one application is running on ports 80 and 443,
but i want to run another application in different ports,
When start the application, application is running fine in the server but i am not able to connect to that application from the web browser.

It seems to me that other port(i.e. except 80 and 443) not listen by the server.

Can anybody tell me what is the problem?

and what can i do to solve this problem.

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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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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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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 Installation :: 10.04 Install :1st SATA Port Not Recognized As /dev/sda - Solve This?

May 2, 2010

My computer has 2 HDDs attached to 1st and 2nd SATA ports of my mobo respectively, the 1st SATA drive is empty while the 2nd have my Windows Vista on it. I also have a Perc/5i RAID card with 2 RAID arrays defined.

I am going to install Ubuntu 10.04 x64 to the 1st SATA driver (I expect it will be /dev/sda), but when I try to install, I found my drives are recognized as below,

/dev/sda > 1st RAID array of my Perc/5i
/dev/sdb > 2nd RAID array of my Perc/5i
/dev/sdc > 1st SATA drive < I need to install ubuntu on this drive
/dev/sdd > 2nd SATA drive

I don't want to install 10.04 as /dev/sdc because I may add more arrays to my raid card which from my experience of 9.04, it will probably change the drive letter of my current /dev/sdc and then system will fail to boot.

Is there any way to force my 1st SATA HDD as /dev/sda during install ?

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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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