Networking :: Ip / Port - Redirect All Traffic

Feb 2, 2010

I have "Server A" with real internet ip (eth0) and lan ip (eth1) There's also "Server B" with lan ip (eth0), I'm running an Apache Web server on "Server B", so I want to redirect all traffic from IP port 80 (Server A) to port 80 (Server B), using the following rule:


iptables -t nat -A PREROUTING -p tcp -d --dport 80 -j DNAT --to This actually works pretty good, from internet I can browse ttp:// But the problem is that if I check the Apache logs, all incoming connections seems to come from instead of showing the real source ip addresses (internet ip's) so this is screwing up all my web stats, I've been looking for hours and hours on how to make a transparent redirect, but can't find any info, I know there must be a way because my old WRT54G router which uses iptables could do it.

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General :: Redirect Incoming Traffic To An Other Port (ubuntu Openvpn Server)?

Dec 5, 2010

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..

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Fedora Networking :: Port Redirect, I.e. Whatever Comes Through Whatever Interface On Port AAAA Will Get Redirected To Port BBBB?

Feb 18, 2010

I want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:

nc: connect to localhost port AAAA (tcp) failed: Connection refused
nc -v -w2 -z localhost BBBB


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Ubuntu Networking :: Redirect Traffic To Free Vpn PacketiX?

Feb 17, 2010

I was trying to find some free VPN service for access restricted pages. I found some working programs for win XP, but nothing works under Linux (TOR was too slow and now it is blocked). I was using program PacketiX under win, and it has also Linux version without GUI, but i was not able to make it work, because I dont know, how can I make firefox to connect through the VPN service.

I downloaded the client here [URL]

I was able to make it work with this guide [URL]

But i dont know, how to adjust routing table so I can connect to the internet through the VPN service.


ath0 Link encap:Ethernet HWaddr 00:05:4e:4d:c5:5f
inet addr: Bcast: Mask:


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CentOS 5 Networking :: Redirect All The Traffic To An Ethernet Interface

Sep 12, 2011

Currently I have a server which runs under centOS 5.6. It is dedicated to the VoIP application of my customer.I have a problem for which I have the solution but I didn't managed to achieve it.So, let me explain you the context.Here is the networking aspects of my environment

VoIP Provider_____Gateway_____________My server
ADSL Provider____(non pingable)
x.x.x.2 <====> A.A.A.1 <======> A.A.A.3


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Ubuntu Networking :: Redirect Network Traffic To A New IP Address Using IPtables?

Jun 19, 2011

how to redirect network traffic to a new IP address using IPtables. I am using Baffalo router and the rtos used is DD-WRT. Basically, I want it so that any connection going through my router to a specific IP (say, will be redirected to another IP (say, so any outgoing connections made by a program that is attempting to connect to192.168.11.5 will instead connect to

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Ubuntu Networking :: Redirect All Http/https/ftp Traffic Through The Remote Proxy?

Apr 6, 2011

I need to redirect all http/https/ftp traffic through the remote proxy, but when I changes connection settings in browser or in System->Preferences->Network Proxy it doesn't work well: instead of getting page content browser asks for saving some short (8 bytes) file with the same content for all requested pages. It happens in Chrome/Opera/Firefox. This proxy requires authorization and works on computer with Windos XP. It worked well when I was using Windows 7 and Proxifier, now I have Ubuntu 9.10 with all available updates.

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Networking :: Easiest Way To Redirect External Traffic To VMWare Web Host On Same Machine?

Jul 14, 2009

Have done a bit of Googling around this but got totally swamped so will try here. Basically we are running a CentOS server which hosts a number of virtual hosts under Apache. Recently I needed to set up a development environment for another site using Ubuntu and have this running and accessible on the LAN from a VMWare image. I'm using bridged networking so the VMWare machine has its own IP on the LAN subnet.

I've set up a DNS to point to the external IP of the physical host but can't figure out how to route traffic requested on this domain to the VMWare host. I've basically tried two approaches (configuring a proxy web server and reverse proxy in an httpd.conf file and mucking around with iptables forwarding rules but without success.

Ideally I'd like to point to the VMWare IP but I could live with a custom port on the end if thats whats required.

To throw further complication into the mix I need reliable communication between the VMWare machine and external mail relay servers in order to debug any issues with mail bouncebacks, embargos etc.

Any idea what's the easiest way to accomplish this?

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Networking :: Source Port Forwarding/redirect?

Jul 23, 2011

My network isPC1 -- (NIC1,10.1.1.x) Linux (NIC2,10.1.2.x) -- Server 1 (HTTP/FTP)My question isIn the linux system, can I change the PC1 source port from 20000 to 30000? for examplePC1(sport:20000,dport:80)---Linux-- (sport:30000,dport:80)--- Server 1 (HTTP/FTP)

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Networking :: Get To Accept Traffic On A Given Port?

Oct 13, 2010

I've got a Slackware 12.2 system that I'm trying to get to accept traffic on a given port, let's say 34521. When I use, to see if that port is responding, it is not.

I've put in an iptables entry to accept traffic on that port, is there anything else I need to do?

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Networking :: Use VPN Tunnel For All Traffic Except SMTP (port 25)?

Nov 8, 2010

I'm new to iptable configuration. I've set up a VPN using DD-WRT on my router and it works fine. However the VPN company does not allow port 25 traffic (in case of spammers) so now I can't get my emails sent out.

I'm guessing I can add some rules to my iptable so that all traffic except port 25 traffic can go out through the VPN tunnel. And hopefully, all port 25 traffic will go out through the normal Internet connection.code...

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Networking :: Get Each Port Of Traffic Of A Switch In MRTG?

Mar 5, 2010

made software which we can get network traffic Report of of Switches for Daily,monthly and yearly base , in MRTG we can configure as a switch so we can get particular switch Traffic but how can we get each port of traffic of a switch in MRTG

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Ubuntu Networking :: Redirect Port 25 To A Remote Machine Via A VPN Connection

Feb 19, 2011

I have had a look at the the information on the ubuntu forum about this but am having trouble getting the server to do what i want it to do.

I have a VPS running ubuntu 9.10 and i am trying to set it up to redirect port 25 to a remote machine via a VPN connection (remote machine connected via VPN)

i have tried setting this up in the firewall using webmin but it is not working.

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Networking :: Redirect Local Http Port To Remote Machine?

May 26, 2010

i have a problem........ How to redirect local http port to remote ip ddress( using destro is Centos 5.3 my rule is this iptables -t nat -A PREROUTING -s 0/0 -d <my local ip> -p tcp --dport 80 -j DNAT --to-destination

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Networking :: Port Based Routing For Local Traffic?

May 24, 2009

I have problem with port based routing for local traffic. I can't use trick with iptables -t mangle, ip route table 1, ip rule fwmark table 1 because it works only with forwarded packets. I can't even use patch-o-matic because it's obsolete. And xtables-addons doesn't contain support for "-j ROUTE" yet.

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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.

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Server :: Redirect All Traffic To A Dynamic IP?

Oct 7, 2010

I was wondering what the best way of redirecting all traffic, not just http traffic, from my hosted web server on hostmonster (with a domain name) to my home server.... I wondered if it would be possible to do it with a simple script running on the hosted web server?? Also is there a way of getting round having all the ports open on the hosted web server that I want to use on my home server??

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Software :: Using Squid/Iptables To Redirect Inbound Web Traffic To Url/IP

Jan 13, 2010

We host a web server in which we are hoping to implement some form of traffic redirection based on source IP address, and I am wondering whether the squid proxy built on iptables would be capable of managing this task? Essentially we are trying to redirect traffic from specific set of source IP ranges to a "Your IP has been restricted" type of page at a different IP/FQDN.

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Ubuntu Installation :: Redirect Internet Network Traffic Through Server?

Sep 30, 2010

I tried to setup a home server that will redirect the internet traffic through the server before it reach the client. Because i don't want to install anti virus on every machine, it will slow them down a lot. There are some anti virus for ubuntu. Most of my home machines are running windows, which is a pain with virus.

p/s: I'm running 1 ubuntu server 10.04 and the rest are windows 7 machines.

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Ubuntu Security :: Iptables To Redirect Traffic Back To Its Source

May 3, 2011

I'm currently using a homemade Python script to parse script kiddie IP addresses from logfiles.To this point, I've simply been DROPping any requests from these IPs using iptables.I thought it might be fun to redirect their traffic back to them, but as I am not an expert at iptables, I was wondering if I should use FORWARD or PREROUTING.

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Ubuntu Security :: Redirect All IP Tables Rule To Forward UDP Traffic?

May 16, 2011

How do I redirect all the UDP traffic on port 27016 of my current dedicated server to a new IP port 27015 using IP tables?

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General :: Redirect Port To Another Machine?

Sep 29, 2010

My poblem: At work I have a proxy with some closed ports. I need to connect to an Oracle DB on some DB_IP at port 1521. DB_IP is a public IP. What I Have: At home, I have a Linux machine and a Linksys WRT54G Router. What I need: How can I do to communicate a PC at work with DB_IP:1521?

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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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General :: E-mail Redirect And Port Change?

Sep 24, 2010

I am looking to set up a system that will bring in an e-mail on a port like 4082 then sent it out to a standard e-mail port. this is a fire wall issue. I am looking for the best software I can use on an Ubuntu-Desktop platform to accomplish this and an idea on how to set this up?

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CentOS 5 Server :: Gateway Server To Redirect Traffic For Http/smpt/pop3

Apr 6, 2010

I have been beating my head for the last few weeks on this problem, (although I have been taking the wrong approach, it seems).

I need a gateway to direct web traffic to three separate servers/domains. I have been trying to do this with both a dns server and , (seperatly), apache server to forward requests. The dns server was a no go, and <i can only get apache to redirect http and ftp.

After Googling this ALOT, I believe that what I need is a gateway server to redirect my traffic to the 3 different servers. I have been reading about using using nat and iptables for this and was wondering if anyone had any advice/suggestions on this. The other thought I had was to use something like pfSense to create the gateway, but I am still reading the documentation, and I am unsure if this approach will work.

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Debian :: Forwarding TCP Packets - Redirect Also The Port 443 (HTTPS)

Mar 16, 2011

This is where it starts: I have 2 networks. The first: composed by the router which has access to the internet with the IP 192.168.1 and the server (who is a gateway) with the IP The other network: composed by the gateway with the IP and the clients (on the subnet). To sum up, the gateway has 2 IPs ( and On this gateway, I have squid installed (and listening on port 3128). I also made a redirection to redirect some computers who want to access to the web (port 80) to squid (port 3128) with this command: /sbin/iptables -t nat -A PREROUTING -m mac --mac-source CLIENT_MAC -p tcp -m tcp --dport 80 -j REDIRECT --to-port 3128

At this stage, everything works fine. The clients can access the web by the proxy without "knowing". What I wanted to do, is redirect also the port 443 (HTTPS). Actually, when a client wants to access to, for example, [URL]. He cannot. So I would want to be able to redirect people (without passing by any proxy) directly to google. Like a NAT. But the problem is that I can't. The thing would be to, in the gateway, take all the packets with port 443 in destination and handle them to the router Then, when the router sends the packet back, the gateway takes the packet and handles it to the client. I tried putting ip_forward to 1, but the problem is that all IPs and ALL PORTS are forwarded. And I just want port 443 to be forwarded.

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OpenSUSE Network :: Redirect The Http Port 80 To The Web Server?

Aug 28, 2010

* a router/gateway. The external interface have the public IP, an other the DMZ, a third the internal room* a DMZ with the web server* an internal network (internet public room)I redirect the http port 80 to the web server. You should see him there.But I can't see this web site from the internal room. From the public IP /URL I have some sort of non existent message (sorry forgot to copy it). If I call for the private IP, I get the home page (but not the CSS files)the gateway nat's the networks.What is the trick to see the web site from the internal network?

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General :: Transparent Redirect Site To Port 8080?

Nov 4, 2010

Currently my home internet provider does not allow services on ports 1 to 1024 but allow the use of high ports to whatever users want to do and I was wondering what ways are there to mask my webserver @ ip:8080 and yet maintain the servernames ? For example currently if I use it will open just fine but I know there some ways to make it look like if port 8080 never existed, one example of this would be using a proxy server somewhere else to redirect the access but I don't have one available nor money to use for this.

In the above case what would happen is that when user hitted the proxy server it would redirect and query my server so user would never know 2nd server existed at all. Another way would be creating a page somewhere else and put your site as a iframe or frame which would hide it but may be a problem to some browsers etc...

So I belive the question here is what options do I have to mask my server at 8080 to look like a transparent webserver? While I do know this seems a bit technical I belive the place to ask this question would be here instead of serverfault

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General :: Configure Apache To Redirect Request To Another Port ?

Aug 11, 2011

*Am trying to configure on machine ? apache on port 8586. *Two applications run on same machine on different ports Jenkins on 8081 and Hudson on 8080.*Request coming to 8586 port should redirect to either 8080 or 8081 on one condition. *The request from client machine coming to MyServernet:8586 looks something like this ?<JOBNAME>/build?token=TOKEN?.

If <JOBNAME> is ?naveen? apache should redirect to 8081.
If <JOBNAME> is not ?naveenn? apache should redirect to 8080.


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Software :: Redirect A Tomcat Application URL And Port Using Apache?

Jun 17, 2011

I have multiple jvm instance of tomcat application on a unix server and its running on different port.i would like to redirect the port and uri.How can i achieve this with the help of apache. i heard we can do it using mod_proxy.


Currently when i access i get 404 error.

one way to achieve this is to rename my exploded app name (offers-service-main) to offer. But i dont want to do that.anyway to achieve it.

This what i have done from my side.

1) installed apache 2.2 with mod_proxy

./configure --prefix=/usr/local/apache2.0

2) Added the below config in apache

ProxyRequests Off
ProxyPreserveHost On
ProxyPass /offer
ProxyPassReverse /offer

But the above configuration dosent seems to be work. Let me know if i need to do anything on the tomcat side.

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