Nick Rosier: > Hi, > > I have Postfix configured to query some maps (proxy:pgsql) on my > Postgresql-server which is only accessible through IPv6. Occasionally > I see following errors: > > postfix/smtp: warning: connect to pgsql server db.domain.tld: could > not translate host name "db.domain.tld" to address: hostname nor > servname provided, or not known?
The getaddrinfo() system library routine returns this error. It works per the instructions in /etc/nsswitch.conf which on my FreeBSD box contains: "hosts: files dns" The Postfix SMTP client uses the getaddrinfo() system library routine returns when the smtp_host_lookup parameter contains "native". Maybe you should use "smtp_host_lookup = dns", and use "inet_protocols = ipv4, ipv6". > The hosts is defined with IPv6 address in /etc/hosts FreeBSD getent > can (currently) not be used to resolve hosts to IPv6 > (http://www.freebsd.org/cgi/query-pr.cgi?pr=161548). dig fails > to resolve unless I request the AAAA-record. If the host has only an IPv6 address, then you must ask for the AAAA record. No surprise here. > I've tried putting the IPv6-address in as host (both 2001:xxx:xxx:xxx > as well as [2001:xxx:xxx:xxx]) but that doesn't work either. What > is the correct format I can put in proxy-maps? Any idea why > hostname resolving seems to work most of the time but sometimes > fail? Say what? The proxymaps feature does not use IP addresses. Wietse
