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How to use iptables to forward HTTP and HTTPS traffic?
I now need to create an iptables rule that filters out and redirects all tcp port 80 and 443 traffic leaving my network through the eth1 interface and send it to a proxy server that resides on a loopback interface on tcp port 9090. I have been searching all over SO but I have not been able to find an example that works.
How is tiny proxy set up with iptables?
It has tiny proxy included in it, and it automatically sets everything up including the iptables. Its currently configured for the IIIT proxy server , so you might want to change it depending on your proxy’s ip. This is part 2 of my earlier post on how to set configure to use a http proxy transparently.
How does iptables re-route traffic to port 80?
The next rule is what actually re-routes traffic on port 80 to the my laptop on port 1234. the jump target “-j DNAT” tells iptables to modify the destination address and port of the packet matched by the criteria specified The 3rd rule modifies the source address of the packet so that it appears as if it is coming from the router.
How does iptables forward packets to squid-box?
The second makes sure that the reply gets sent back through iptables-box, instead of directly to the client (this is very important!). The last one makes sure the iptables-box will forward the appropriate packets to squid-box. It may not be needed. YMMV.
Can a transparent proxy be used with https?
HTTPS cannot be used with a transparent proxy. There are some hacks, but it doesn’t make any sense and is useless. iptables-box : where your iptables software reside (usually the gateway, in my case 192.168.1.1) The first one sends the packets to squid-box from iptables-box.
Are there alternative ways to direct DNS traffic to a Squid proxy?
In explicit response to your last sentence/question, there are no alternative ways to direct DNS traffic to a Squid proxy, because Squid does not proxy DNS traffic. Can squid forward DNS queries to a DNS server?
How are iptables used in Ubuntu gateway system?
I have a Ubuntu linux system acting as a gateway system with two interfaces on it. One interface is for the local network and one interface is for the internet. I am able to route traffic through it with no problem at all. I use two iptables rules to forward outbound traffic from the internal interface:
How to setup a proxy server with iptables?
In my current setup I have a router which is connected to the IIIT LAN which has access to the proxy server. And laptop is connected to the router. I managed to install DD-WRT which is a linux based firmware for routers. So I can now SSH to my router and mess with the iptables on it.
How to redirect a port in iptables Nat?
The syntax is as follows to redirect udp $srcPortNumber port to $dstPortNumber: iptables -t nat -A PREROUTING -i eth0 -p udp –dport $srcPortNumber -j REDIRECT –to-port $dstPortNumber. Replace eth0 with your actual interface name.
What are the iptables rules for port 80?
The idea was to redirect all traffic on port 80 which goes through the router back to a server running on my laptop. iptables has rules across 5 tables : filter,nat,mangle,raw,security. The default table is filter which as its name suggests is used to filter traffic and block certain traffic etc.
Is it possible to forward traffic to a new IP?
By using iptables and its masquerade feature, it is possible to forward all traffic to the old server to the new IP. This tutorial will show which command lines are required to make this possible. In this article, it is assumed that you do not have iptables running, or at least no nat table rules for chain PREROUTING and POSTROUTING .
Is it possible to forward all traffic to the old server?
By using iptables and its masquerade feature, it is possible to forward all traffic to the old server to the new IP.