BTW., I've noticed that the nf tables defined in /etc/nftables.conf are not loaded at all by boot/systemd, manual loading is needed.
systemctl status nftables says # systemctl status nftables ● nftables.service - nftables Loaded: loaded (/lib/systemd/system/nftables.service; disabled; vendor preset: enabled) Active: inactive (dead) Docs: man:nft(8) http://wiki.nftables.org It's disabled. So a central question is: What is the default firewall system of ubuntu 15.10: iptables or nftables? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1503695 Title: nft nat not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1503695/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs