iptables: No chain/target/match by that name.

adelphia · 08-29-2018, 06:13 PM

TLDR;

I can't get IP tables to redirect traffic to a proxy:

Code:

$ sudo iptables -t nat -A PREROUTING -i wlp2s0 -p tcp --dport 80 -j REDIRECT --to-port 8080
[sudo] password for you: 
iptables: No chain/target/match by that name.

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I am trying to write a program to unlock my front door but I need to reverse engineer the API used by the lock's Android app. To that end, I'm following these instructions.

I was able to figure out the correct interface name, but beyond that I really don't know what I'm doing here. Any help is greatly appreciated.

berndbausch · 08-31-2018, 01:15 AM

You are trying to add a rule to table nat, chain PREROUTING. All TCP packets going into wlp2s0 with destination port 80 will have their destination port rewritten to 8080.

It might be that there is no nat table and/or no PREROUTING chain in your device. Run iptables -t nat -S to list all chains in the nat table.

Or your version of iptables requires the -m tcp option?