In Fedora 32 and EL 8 nftables is the default firewall and does not accept : for port ranges, fixes RHBZ#1850164.

fail2ban.spec

@@ -185,6 +185,12 @@ find -type f -exec sed -i -e '1s,^#!/usr/bin/python *,#!/usr/bin/python%{python3
 # SELinux sources
 cp -p %SOURCE1 %SOURCE2 %SOURCE3 .
 
+# In Fedora 32 and EL 8 nftables is the default firewall and does not accept ":" for port ranges.
+# https://bugzilla.redhat.com/show_bug.cgi?id=1850164
+%if 0%{?fedora} >= 32 || 0%{?rhel} >= 8
+sed -i "s/port = 0:65535/port = 0-65535/" config/jail.conf
+%endif
+
 
 %build
 %py3_build