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


View 2 Replies


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

View 3 Replies View Related

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


View 6 Replies View Related

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?

View 4 Replies View Related

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


View 9 Replies View Related

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.

View 6 Replies View Related

Slackware :: Port Forwarding Using IPtables?

Jun 16, 2011

how to set an external static IP address to forward to an internal static IP address. Here is an example:

Linux box (slackware) IP address =
eth0: (internal)

DVR system that I need to forward to: IP address =

This was all setup by someone else whom I have never spoken with. The IP tables seems to be set up but I cannot provide a screen shot at this time. What I need to do is this. When a user connects to the external static IP address of with their DVR software, IP tables will forward to the DVR system at The ports desired are 554,555,556, and 557. I know some about Linux but not about IPtables.

View 1 Replies View Related

General :: Do A NAT Forward In Iptables?

Jan 7, 2010

I am trying to do a NAT forward in iptables but get the following error:Quote:[root@server88-xxx-xxx-198 openvpn]# iptables -t nat -I POSTROUTING -i tun0 -o eiptables v1.3.5: Can't use -i with POSTROUTINGAny ideas on what to do?I have an OpenVON server running and I need the client to use the ports on the OpenVPN server

View 8 Replies View Related

Security :: Iptables: Verify Traffic On Port To Check If It Is Legitimate For That Port?

Apr 18, 2011

Is there any way to verify if packets being trafficked over a certain port are valid for the service you want to use this port for?

One obvious example that probably clarifies my question:
When I open port 443 (outgoing or incoming) for https/ssl traffic, I don't want this port to be used for say openvpn traffic.
Thus: when someone wants to surf to a website with https, it should be ok but if someone wants to connect to his home openvpn server over that same port, it should be blocked.

View 5 Replies View Related

Networking :: Iptables - Forward All FTP To Other Server?

Dec 24, 2008

So here is my issue in a nutshell. I need to take FTP requests that hit Server_A and forward them to Server_B. Server_B is not natted...Server_B is another public server in a completely different location in the world. One thing to note is that I only have one NIC hence why you will see both in and out being eth0. This is what I have in my iptables on SERVER_A:iptables -A FORWARD -p tcp -i eth0 --sport 21 -o eth0 -d SERVER_B --dport 21 -m state --state NEW -j ACCEPTiptables -A FORWARD -p tcp -i eth0 --sport 20 -o eth0 -d SERVER_B --dport 20 -m state --state NEW -j ACCEPTI've also tried both of the above without the --sport option. When I FTP to SERVER_A (where the above iptables rule are) it connects to SERVER_A instead of forwarding them to SERVER_B.

View 1 Replies View Related

Server :: Iptables To Forward According To The Domain?

Jul 22, 2011

my company is a small company!and it only have one public ip,but my company have a lot of websites to access!now i use Reverse Proxy Server -- apahce to solve temporary!it is not convenience for me !So i think out whether iptables can not be used to forward according to the domain!!it is the test as follows:

public ip :
privite ip1 :
matching website
privite ip2:
matching website

and if someone access [URL] the iptables will know they want to access and it will forward to the server!!

View 1 Replies View Related

Networking :: Iptables - Port Forwarding To Blocked Port?

Mar 25, 2010

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...

View 2 Replies View Related

Fedora :: Iptables Loads But Won't Forward Internet / Why Is So?

May 6, 2011

I just upgraded my fedora 13 to fedora 14. I changed the cpu and the motherboard so i had to install from scratch...but I saved my iptables.
The problem is that
I do all the suff
service iptables save
And apparently it works...
But everytime I reboot I have to re run the script to forward Internet...Everything else works just fine...I mean I can ssh, vnc, etc but wont forward intel :S dont know why?

View 2 Replies View Related

Networking :: Set Iptables To Forward All On An Aliased Ip Address?

Apr 15, 2009

I have three machines on three networks192.x.x.x10.x.x.x172.x.x.xThe routers are set to forward communication between 192. network and 10. network, and between the 10. network and the 172. network.However, there's not routing between 192. and 172.I want to fix that by using a machine on the 10. network to forward communication between the other two networks.The machine has one etherent connection eth0 whose address is set up an aliased ip address eth0:0 to be using Quote:ifconfig eth0:0 I tried to set forwarding rules the 10. machine such that address will provide access to the machine as followsQuote:# iptables -t nat -A PREROUTING -d -j DNAT --to-destination default policies for all chains is ACCEPT.I then try to access from expecting it to actually access ; it does not work

View 3 Replies View Related

Networking :: Forward Multiple Public Addresses With Iptables?

Jun 3, 2011

iptables and multiple public-facing IP addresses. With the current setup I have a public-facing firewall with iptables which will then forward traffic to a LAN IP. I will hopefully be allotted 1 private IP per public IP, which I hope will make this much more simple. For example, I have server A with the LAN IP of which I would like to have traffic forwarded from, the public IP. I also have server B with LAN IP of which I would like to have forwarded from, the second public IP. From what I have read and understood, this should be a simple task, however I would just like to double check to make sure that it is in fact possible, and if so, how would it be recommended that I go about doing so. Essentially, I need to forward each public IP to a corresponding LAN IP with all ports.

View 3 Replies View Related

Networking :: Using Iptables To Route/forward To Identical LANs?

Jul 18, 2011

The goal is to make connection calls (ssh, ping, ...) possible from one LAN (LAN-1) to a number of (at the moment two) separate smaller LANs.These smaller LANs (LAN-2a, LAN-2b, ...) have exact same specifications (same IP range, same number of nodes, ...)!The idea is to use a Fedora box (release 14 with and implement an appropriate iptables routing/forwarding.The Fedora box has three network interfaces:

- eth0 (aaa.bbb.ccc.m) on LAN-1 (aaa.bbb.ccc.0/24)
- eth1 (ddd.eee.fff.n) on LAN-2a (ddd.eee.fff.0/27)
- eth2 (ddd.eee.fff.p) on LAN-2b (ddd.eee.fff.0/27)


View 10 Replies View Related

Debian Configuration :: Setting IPTables Default Forward Policy?

May 3, 2010

I'm intending to replace my current router (486DX2 w/16MB running FREESCO which has been faithfully working 24/7 for well over a decade) with a debian box with a bit more grunt and newer features. I'm currently setting up my iptables ruleset and am after a bit of advice re the FORWARD policy. A few example rulesets I have found set the default policy to DROP and the have two lines for each port forward, one to allow the traffic and one to direct the incoming packets to the correct machine.

iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 25 -j DNAT --to-destination
iptables -A FORWARD -i eth1 -p tcp --dport 25 -o eth0 -d -m conntrack --ctstate NEW -j ACCEPT

I'm thinking of setting the default policy to ACCEPT to cut down on typing as my default INPUT policy is DROP and unless there is a valid FORWARD rule for a particular port, the packets aren't going anywhere anyway. Or have I misunderstood something. My googling returned heaps of example scripts & not much intelligent commentary. Alternatively, what do you all use to configure & maintain your debian gateways; hand rolled iptables rules, or any toolset recommendations?

View 4 Replies View Related

Fedora :: Set The INPUT - OUTPUT And FORWARD Chains In Iptables To ACCEPT?

Oct 25, 2009

What commands do you use to set the INPUT, OUTPUT, and FORWARD chains in iptables to ACCEPT?

View 5 Replies View Related

Networking :: Fedora Iptables Forward Port80 To Other Proxy Server?

May 20, 2009

I'm using Fedora Core5.0 I have using Iptables for forward port 80 to port 3128(Squid) in the same of server.I need to forward using Iptables to use the other proxy server because this server i am use for vpn and mail tranfer.What a Commnand for i use?ase 1. Server 1 >Ip SQUID WITH PORT(3128)2. Server 2 IP PF SENSE (3128) I will use server 2 for using internet connect only.

View 1 Replies View Related

General :: Enabling Iptables To Forward Multicast Or Broadcast Messages

Jan 11, 2010

Can we enable IP tables to forward multicast or broadcast messages?

View 1 Replies View Related

General :: IPTables Drop Or Forward Host (Incoming Connection)

May 3, 2010

How can I drop or forward a incoming connection from a part of a host like *
For example:
The user is connection from * on port 12345
So how can I drop this connection or forward to on port 80

View 5 Replies View Related

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]

View 1 Replies View Related

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?

View 8 Replies View Related

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?

View 3 Replies View Related

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.

View 2 Replies View Related

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

View 3 Replies View Related

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


View 5 Replies View Related

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?

View 9 Replies View Related

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?

View 10 Replies View Related

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.

View 1 Replies View Related

Copyrights 2005-15, All rights reserved