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JanezKranjski
Asked: 2016-10-22 03:53:47 +0800 CST

Failed to start netfilter-persistent configuration

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I'm using Ubuntu 16.04 and until yesterday I used UFW and had only some basic rules. Now I need to have more complex rules and I decided to use iptables (if I understand right, I can't have my firewall rules in file without it). Now I see an error for netfilter-persistance.service if I run: sudo systemctl status netfilter-persistent.service

screenshot

Any idea?

iptables

1 Answers

  1. First of all check

    sudo journalctl -e -u netfilter-persistent.service

    for errors. Then have a look at which are rules being loaded by netfilter-persistent service. Which are located in /etc/iptables/rules.v4 and /etc/iptables/rules.v6. The service pretty much just loads firewall rules using:

    sudo iptables-restore < /etc/iptables/rules.v4

    You cat try to debug it line by line (and the same for rules.v6). After removing erroneous statement you can restart the service:

    sudo systemctl restart netfilter-persistent.service
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