On Wed, 19 Jul 2000, C.M. Wong wrote:
> Hi All,
>
> Lately, I have been encountering some prob with my pop service. I get the
> below error on /var/log/message:
>
> inetd[18313]: pop-3/tcp server failing (looping or being flooded), s
> ervice terminated for 10 min
The error says it all: it's spawning processes faster than the threshhold
allows and closes service for 10 minutes (and yes, it will come back if you let
it sit there for awhile).
>From the man page ("man 5 inetd.conf"):
The optional ``max'' suffix (separated from ``wait'' or ``nowait'' by a dot)
specifies the maximum number of server instances that may be spawned from
inetd within an interval of 60 seconds. When omitted, ``max'' defaults to 40.
The 40 connections/minute acts as an emergency brake to limit the damage a
DoS'd service can do. However, if you run a busy mail server, it is possible to
exceed 40 connections/minute of legitimate traffic. If you see this warning
in normal operation, up the limit. In inetd.conf, look for this line:
pop-3 stream tcp nowait root
change nowait to nowait.## such as:
pop-3 stream tcp nowait.80 root
-- Brian
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