thank you for help. it was exactly as you said. i just installed only fail2ban server package and set it up and it works correctly with iptables.
-- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/347cd0c6-fcd7-45ff-b06b-e36ab5febcec%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.