diff -ruN ufw-0.29.3-orig/conf/before6.rules ufw-0.29.3/conf/before6.rules
--- ufw-0.29.3-orig/conf/before6.rules	2010-01-30 16:40:05.000000000 +0100
+++ ufw-0.29.3/conf/before6.rules	2010-07-31 10:51:03.974125030 +0200
@@ -22,7 +22,9 @@
 
 # for stateless autoconfiguration (restrict NDP messages to hop limit of 255)
 -A ufw6-before-input -p icmpv6 --icmpv6-type neighbor-solicitation -m hl --hl-eq 255 -j ACCEPT
+-A ufw6-before-output -p icmpv6 --icmpv6-type neighbor-solicitation -m hl --hl-eq 255 -j ACCEPT
 -A ufw6-before-input -p icmpv6 --icmpv6-type neighbor-advertisement -m hl --hl-eq 255 -j ACCEPT
+-A ufw6-before-output -p icmpv6 --icmpv6-type neighbor-advertisement -m hl --hl-eq 255 -j ACCEPT
 -A ufw6-before-input -p icmpv6 --icmpv6-type router-solicitation -m hl --hl-eq 255 -j ACCEPT
 -A ufw6-before-input -p icmpv6 --icmpv6-type router-advertisement -m hl --hl-eq 255 -j ACCEPT