STRHOSTSVR

We use TCP/IP pretty extensively and are having a recurring problem. 
Our system startup job starts host servers, but sometimes they seem to
crash.  We notice this when a CA/400 for Win 95/NT user tries to connect
and can't.  We issue STRHOSTSVR *ALL, and the user is fine.  This seems
to only happen after the SYSSTARTUP job starts the host servers on
weekends - one we manually issue the command, it seems to stay up all
week.  

I can't find any QSYSOPR msg.  This doesn't seem to happen all the time,
and not always on the same AS/400's.  Anyone have any ideas?  What are
the names of the server jobs, so I can watch out for them?
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