Networking :: Packet Redirecting To Another Interface Of The Box

Nov 19, 2010

I have to interfaces eth0(10.0.0.7) and wlan1(10.0.0.8) in my box. An application is listening (say, udp socket) at 10.0.0.7:5888.

Now if someone sends packet at 10.0.0.8:5888, I want to forward them to 10.0.0.7:5888.

I have tried this - iptables -t nat -A PREROUTING -p udp --dport 5888 -d 10.0.0.8 -j DNAT --to-destination 10.0.0.7

But Packets(with destination addr 10.0.0.8) are not received by the application (But they are received by the box, I have checked using wireshark). I have also enabled ip_forwarding.

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Feb 24, 2010

say i have an apache server configured for ssl/non ssl virtual hosts and a proxy configured as follows (see squid.conf)the ssl on each name based virtual host is configured on its own port (only 7 of the domains need this the rest are just media and other insignificant bits of data but domains 1-7 contain forms that require specific personal information that may be technically illegal to transmit without encryption)if any additional information is needed just let me know

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[code]....

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Dec 6, 2010

I've been trying to redirect all outgoing packets (destined for a specified ip address) from my slack box back to itself. I thought this could be done with iptables, but if I fire up wireshark I can clearly see that the packets are getting out to the real server and I'm getting responses from it.

So here's what I tried:

All looks good and fine, and then I even try to visit 194.28.157.42 with firefox (by the way I am running a webserver, that is set to show a page when you visit 127.0.0.1) and I get an error page that reads: 502 Bad Gateway.

I ignored this message to see what the program I'm trying to interrupt does, and when I start wireshark and then start the program that is using that website, I can clearly see that the packets make it to the real 194.28.157.42 and get back responses.

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I got it set up in the NetworkManager applet (imported the client.ovpn), but when I connect it sends ALL my traffic through the VPN. I would prefer all accesses to the internet go over my normal default gateway, rather then all the way through to the VPN's default gateway.When I connect through the command line:

Code:
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[code]...

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I had been running my SMTP server with WINE, as the SMTP server software is a Windows-based program (MERCURY), but I cracked the shits with WINE and removed it. Now I am running my SMTP server in a Windows virtual machine.This virtual machine has a different IP address from my host machine, so what I need is for my computer (the host) to redirect incoming traffic on port 25 to the virtual machine at 192.168.56.101 on port 2525.Can someone please help me with it? I think its done with iptables.

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Networking :: IPTables - Redirecting Web Traffic To Single Transparent Proxy Server

Mar 25, 2010

I am new to iptables. We have two Squid proxy servers running in "non-transparent mode" (172.16.0.1 and 172.16.0.2). Currently users have to configure the proxy server they want to use by configuring them in their browsers. Recently I saw an example for redirecting web traffic to a single transparent proxy server.

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I have 3 Dell Precision M4400 machines. After getting updates yesterday or today, I get random network dropouts like crazy, on wired or wireless. On one machine I was able to turn off ipv6 in grub and reboot, and it works now. However on the other 2 machines, still have the same problems. All 3 are running 9.10 64 bit. Is there a way I can back out the updates so the network works again? Anyone else see this behavior after updates today?

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I have given the command:

The problem is that the first packet that matches this rule will be the SYN-ACK and I suspect it is simply DROPPED.

I am sparing you the gory details of why I would do such a silly thing, but simply put; I need to intercept client-to-server packets through a tunnel, but allow server-to-client packets to follow through the regular network.

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Feb 7, 2010

I have a machine with two network cards running linux mint 8 XFCE (which is compatable with Ubuntu Intrepid Ibex). eth0 gos out onto the network propper, has a static IP address of 10.10.10.10 and serves DHCP requests for the 10.10.10.x subnet.

eth1 is pluged into a PPPoE concentrator, and has a static address of 192.168.0.1 (I would have left it alone but pppoeconf wouldn't work unless it had an address).

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Feb 27, 2010

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Dec 1, 2010

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with the help of port no or any other how can i identify the icmp packet ?... This below two is working fine

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Jun 23, 2010

I am simulating a TCP/FTP to TCP/FTP network and trying to monitor the packet loss.

I am able to monitor and graph data regarding the TCPSinks' bytes received, but I can't monitor packet loss.

Why is it that the TCPSink Agent has a variable for bytes (bytes_) but not one for monitoring packet loss?

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Below is part of the code for monitoring bytes received from sinks if anyone was interested.

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May 4, 2011

I have 2 Ubuntu boxes sitting in the same subnet; server 1 [130.15.6.68] and server 2 [130.15.6.69] What I am trying to achieve here is the following: server 1 act as a gateway or proxy to server 2, meaning that server 1 is exposed to the Internet and all traffic to server 2 should go though it (i hope!).

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Code:
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[Code]...

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