We're playing with enabling IPv6 support, and I've found an interesting bug in IO::Socket I thought I'd let others be aware of. If in your /etc/hosts file, the IPv6 addresses are listed prior to the IPv4 host address, IO::Socket will time out. For example, if I have:

127.0.0.1       localhost
::1     localhost
fe00::0 ipv6-localnet
ff00::0 ipv6-mcastprefix
ff02::1 ipv6-allnodes
ff02::2 ipv6-allrouters

10.11.12.13     myipv4-host.name.domain myipv4-host

IP::Socket will fail when used by Net::LDAP

If I move the 10.11.12.13 address prior to all of the IPv6 pieces, it works fine. Other IPv4 tools work without issue. So if you see weird behavior out of Net::LDAP on IPv6 enabled systems even if you are only dealing with IPv4, this may be the cause.

--Quanah

--

Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
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