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@@ -54,3 +54,14 @@ That's it!
Read the ipset(8) and iptables(8), ip6tables(8) manpages on how to use
ipset and its match and target from iptables.
+
+Compatibilities:
+
+- The ipset 5.x userspace utility contains a backward compatibility
+ interface to support the syntax of ipset 4.x.
+- The ipset 5.x userspace utility can't talk to the kernel part of ipset 4.x.
+- The ipset 5.x kernel part can't talk to the userspace utility from
+ ipset 4.x.
+- The ipset 5.x kernel part can work together with the set match and SET
+ target from iptables 1.4.7 and below, however if you need the IPv6 support
+ from ipset 5.x, then you have to use iptables 1.4.8 or above.