diff -up system-config-firewall-1.2.29/src/fw_iptables.py.ipv6-dhcp system-config-firewall-1.2.29/src/fw_iptables.py
--- system-config-firewall-1.2.29/src/fw_iptables.py.ipv6-dhcp	2012-04-20 18:44:49.788614086 +0200
+++ system-config-firewall-1.2.29/src/fw_iptables.py	2012-04-23 23:14:31.745233715 +0200
@@ -368,6 +368,9 @@ class iptablesClass:
         self._icmp(conf, fd, "INPUT", reject_type)
         # trust lo
         fd.write("-A INPUT -i lo -j ACCEPT\n")
+        # Always allow ipv6-dhcp
+        if self.type == "ipv6":
+            fd.write("-A INPUT -m state --state NEW -m udp -p udp --dport 546 -d fe80::/64 -j ACCEPT\n")
         # trusted interfaces
         if conf.trust:
             for dev in conf.trust: