Description of problem: I have a IPv4/IPv6 network. As such many domain names have both A and AAAA records. Reverse DNS works forward and backward for all of these things. Zabbix will accept Server=FQDN. It some times works, some times doesn't. I do not know but it seems that it resolves to just one of the entries and then only accepts from that entry. Instead, it should create it's own comma sepparated list and accept connections from anything where forward <=> reverse DNS is true. This seems to be suggested in the 1.8 documentation online, but it is NOT working in my case. Version-Release number of selected component (if applicable): zabbix-1.8.5-1.fc15.x86_64 Additional info: Server FQDN has one A and two AAAA records. Interestingly enough, while other hosts work sporadically (whether the resolved Server= line matches the ip address used by zabbix to contact the agents or not), it NEVER works for the localhost.
There are no Fedora specific changes in the zabbix package so this issue should be definitely discussed/reported in upstream forums or bug tracker. Please open it there.
As you have requested: http://taipei.sapphiresunday.org/zabbix/discovery.php?sid=ee7cbd9ee6de57ce This does include a patch which fully fixes the problem.