FYI, I cannot reproduce this with even less memory: $ iptables --version iptables v1.6.1
$ free total used free shared buff/cache available Mem: 265712 114824 66744 1024 84144 36024 Swap: 0 0 0 $ cat /proc/version_signature Ubuntu 5.0.0-7.8-generic 5.0.0 $ sudo iptables -S -P INPUT ACCEPT -P FORWARD ACCEPT -P OUTPUT ACCEPT -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1820114 Title: iptables v1.6.1: can't initialize iptables table `filter': Memory allocation problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/iptables/+bug/1820114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs