Re: connections from ipv4 localhost logged as unknown[127.0.0.1]
Tom Hendrikx: > Wietse Venema wrote: > > Tom Hendrikx: > >> Hi, > >> > >> After setting up postfix up on a ipv4/ipv6 dualstack machine I'm seeing > >> the following issue: connections on 127.0.0.1 (where my content_filter > >> re-injects mail) are logged as: > >> > >> 010-01-13T22:51:07+01:00 meredith-vmail postfix/smtpd[4772]: warning: > >> 127.0.0.1: address not listed for hostname ip6-localhost > > > > Given the client IP address 127.0.0.1, Postfix gets the name > > ip6-localhost, but that name does have the address 127.0.0.1. > > > >> After some time reading google and debugging this is what I found out: > >> - /etc/hosts contains the following stuff regarding localhost (in the > >> specified order): > >> ::1 ip6-localhost ip6-loopback > >> 127.0.0.1 localhost > > > > And indeed. Name ip6-localhost does not list address 127.0.0.1. > > > > Somewhere, you have a mapping from 127.0.0.1 that returns ip6-localhost, > > and that mapping is screwing things up, because 127.0.0.1 is not > > listed as an address for ip6-localhost. > > > > I got as far as this conclusion too, which got me checking for the > contents of /etc/hosts. Since I can influence the lookup results easily > by shuffling the contents of /etc/hosts, can I conclude that this is an > issue with my glibc? Obviously, there is no 127.0.0.1 <-> ip6-localhost mapping in /etc/hosts. Therefore, when Postfix gets ip6-localhost when it asks the name for 127.0.0.1, then that information did not come from /etc/hosts. You can tweak your /etc/hosts until the cows come home, or you can try to find out were that 127.0.0.1->ip6-localhost is coming from. Wietse
Re: connections from ipv4 localhost logged as unknown[127.0.0.1]
Wietse Venema wrote: > Tom Hendrikx: >> Hi, >> >> After setting up postfix up on a ipv4/ipv6 dualstack machine I'm seeing >> the following issue: connections on 127.0.0.1 (where my content_filter >> re-injects mail) are logged as: >> >> 010-01-13T22:51:07+01:00 meredith-vmail postfix/smtpd[4772]: warning: >> 127.0.0.1: address not listed for hostname ip6-localhost > > Given the client IP address 127.0.0.1, Postfix gets the name > ip6-localhost, but that name does have the address 127.0.0.1. > >> After some time reading google and debugging this is what I found out: >> - /etc/hosts contains the following stuff regarding localhost (in the >> specified order): >> ::1 ip6-localhost ip6-loopback >> 127.0.0.1 localhost > > And indeed. Name ip6-localhost does not list address 127.0.0.1. > > Somewhere, you have a mapping from 127.0.0.1 that returns ip6-localhost, > and that mapping is screwing things up, because 127.0.0.1 is not > listed as an address for ip6-localhost. > I got as far as this conclusion too, which got me checking for the contents of /etc/hosts. Since I can influence the lookup results easily by shuffling the contents of /etc/hosts, can I conclude that this is an issue with my glibc? Example: changing the contents of the hosts file to: ::1 ip6-foobar ip6-localhost ip6-loopback 127.0.0.1 localhost yields the following result: postfix/smtpd[5128]: warning: 127.0.0.1: address not listed for hostname ip6-foobar -- Regards, Tom signature.asc Description: OpenPGP digital signature
Re: connections from ipv4 localhost logged as unknown[127.0.0.1]
On Wed, Jan 13, 2010 at 3:20 PM, Tom Hendrikx wrote: > Hi, > > After setting up postfix up on a ipv4/ipv6 dualstack machine I'm seeing > the following issue: connections on 127.0.0.1 (where my content_filter > re-injects mail) are logged as: > > 010-01-13T22:51:07+01:00 meredith-vmail postfix/smtpd[4772]: warning: > 127.0.0.1: address not listed for hostname ip6-localhost > 2010-01-13T22:51:07+01:00 meredith-vmail postfix/smtpd[4772]: connect > from unknown[127.0.0.1] > > After some time reading google and debugging this is what I found out: > - /etc/hosts contains the following stuff regarding localhost (in the > specified order): > ::1 ip6-localhost ip6-loopback > 127.0.0.1 localhost > > [snip] > mydomain = whyscream.net > myhostname = a.mx.whyscream.net > Add your machine's hostname and FQDN to /etc/hosts: ::1 ip6-localhost ip6-loopback 127.0.0.1 localhost a a.mx.whyscream.net -Mike
Re: connections from ipv4 localhost logged as unknown[127.0.0.1]
Tom Hendrikx: > Hi, > > After setting up postfix up on a ipv4/ipv6 dualstack machine I'm seeing > the following issue: connections on 127.0.0.1 (where my content_filter > re-injects mail) are logged as: > > 010-01-13T22:51:07+01:00 meredith-vmail postfix/smtpd[4772]: warning: > 127.0.0.1: address not listed for hostname ip6-localhost Given the client IP address 127.0.0.1, Postfix gets the name ip6-localhost, but that name does have the address 127.0.0.1. > After some time reading google and debugging this is what I found out: > - /etc/hosts contains the following stuff regarding localhost (in the > specified order): > ::1 ip6-localhost ip6-loopback > 127.0.0.1 localhost And indeed. Name ip6-localhost does not list address 127.0.0.1. Somewhere, you have a mapping from 127.0.0.1 that returns ip6-localhost, and that mapping is screwing things up, because 127.0.0.1 is not listed as an address for ip6-localhost. Wietse
