That sounds like inetd rate limitting the amount of connections per second. On FreeBSD,

man inetd says,

ERROR MESSAGES
     The inetd server logs error messages using syslog(3).  Important error
     messages and their explanations are:

     service/protocol server failing (looping), service terminated.
     The number of requests for the specified service in the past minute
     exceeded the limit.  The limit exists to prevent a broken program or a
     malicious user from swamping the system.  This message may occur for sev-
     eral reasons:

           1.   There are many hosts requesting the service within a short
                time period.

           2.   A broken client program is requesting the service too fre-
                quently.

           3.   A malicious user is running a program to invoke the service in
                a denial-of-service attack.

           4.   The invoked service program has an error that causes clients
                to retry quickly.

     Use the -R rate option, as described above, to change the rate limit.
     Once the limit is reached, the service will be reenabled automatically in
     10 minutes.


At 07:44 AM 07/10/2003, Igor Shinin wrote:
Hi!

I face to the problem :

qpopper service suddenly start to fail with the following message:

>
>  Oct 7 15:15:58 hstname inetd[109] pop3/tcp server failing (looping),
service terminated
>

Any ideas?

ish



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