The tcp syncookies issues is not a ufw bug. In fact, toggling it one way are another your logs show the same kernel message.
The real issue is sane not working with ufw enabled. You need to use the nf_conntrack_sane module. See https://bugs.launchpad.net/ufw/+bug/1595046/comments/14 for details. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1631553 Title: With UFW enabled, kernel reports SYN flooding To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ufw/+bug/1631553/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
