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Thread: Iptables (20.04) won't accept my prerouting from 18.04

  1. #1
    Join Date
    Mar 2017
    Beans
    11

    Iptables (20.04) won't accept my prerouting from 18.04

    I've just installed a clean Ubuntu server 20.04, and was going to add some pre/post routing rules, but I can't get them to be added.

    I've tried

    iptables -A PREROUTING -i enp0s3 -p tcp -m tcp --dport 49620 -j DNAT --to-destination 192.168.2.53:22222

    but getting the response:

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

    This worked without any issues on my older 18.04 server.
    I've searched for answer how to add a chain, but can't find anything about it..

  2. #2
    Join Date
    Apr 2014
    Beans
    793

    Re: Iptables (20.04) won't accept my prerouting from 18.04

    I'm mediocre at best with iptables but it looks like you aren't passing a table to it.

    https://my.esecuredata.com/index.php...sing-iptables/

    Notice the -t flag.

  3. #3
    Join Date
    Mar 2017
    Beans
    11

    Re: Iptables (20.04) won't accept my prerouting from 18.04

    that made the error message go away, but when I'm checking with "iptables -L" it's not there.

    Chain INPUT (policy ACCEPT)
    target prot opt source destination

    Chain FORWARD (policy ACCEPT)
    target prot opt source destination

    Chain OUTPUT (policy ACCEPT)
    target prot opt source destination

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