On Fri, Jul 09, 2010 at 01:47:40PM +0200, St?phane MERLE wrote:
> Hi,
>
> My ISP (ovh) is complaining about my postfix servers doing wrong ARP
> demand, do you have any idea of what can cause this in my postfix
> configuration ?
>
> 188.165.55.92 : is one of the server ip (ip failover)
>
> Thu Jul 8 02:03:32 2010 : arp who-has 169.254.140.241 tell 188.165.55.92
This IP address is a link-local IP address:
http://tools.ietf.org/html/rfc3927
these support zero-configuration local networking, ...
> 19:43:20.840082 arp reply 169.254.140.241 is-at 00:24:c3:84:04:00
Your ISP or router is proxy-arping for this IP, it should not. Link-local
addresses should be exempt (if possible).
> 19:43:20.840087 IP ovh63.bpreducer.com.59549 > 169.254.140.241.smtp: S
> 1213354010:1213354010(0) win 5840 <mss 1460,sackOK,timestamp 759487196
> 0,nop,wscale 6>
Why are are sending email to this IP address? Any Postfix logs that
indicate attempts to connect to this relay?
> if you need the postfix conf files, I will send it in.
Mostly just logs that show the life-cycle of a message (all log entries
for its queue-id) in which deliveries to this IP address were attempted
and failed.
--
Viktor.
