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What is redirect in iptables?
REDIRECT alters the destination IP address to send to the machine itself. In other words, locally generated packets are mapped to the 127.0. 0.1 address. It’s for redirecting local packets. If you only want to redirect the traffic between services on the local machine, it will be a good choice.
Is 80 and 8080 the same?
“8080” was chosen since it is “two 80’s”, and also because it is above the restricted well known service port range (ports 1-1023, see below). Its use in a URL requires an explicit “default port override” to request a web browser to connect to port 8080 rather than the http default of port 80.
How to check port redirection in Linux using iptables?
How to check port redirection in Linux and how to save iptables rules. Here are few iptables tutorials for your basics : Our requirement is to redirect port 80 to port 8080 in the same server. This can be done by adding rules in PREROUTING chain.
How does forward chain work in iptables systutorials?
After research about PREROUTING and FORWARD chain in iptables,This is what I realized: FORWARD chain is after PREROUTING chain. Ports are translated to the destination port, in PREROUTING chain by NAT, therefore In FORWARD chain there is no traffic with the port(80) and all traffic translated to port(8080).
How to change port number in iptables port forwarding?
#iptables -t nat -A PREROUTING -s 192.168.10.0/24 -p tcp –destination-port 80 Redirect –to-port 10000 As the server on internet listens to port 80 or 443, after altering the port number will it change the packet header to port 10000, if so server will not be able to respond for the port number it receives.
How to redirect a port in a NAT table?
You can easily redirect incoming traffic by inserting rules into PREROUTING chain of the nat table. You can set destination port using the REDIRECT target. The syntax is as follows to redirect tcp $srcPortNumber port to $dstPortNumber: