Since I upgraded Apache, people have been having period trouble
connecting to our server, especially using SMTP and FTP. I have
reproduced this: I can sit at my system (which is connected via switched
10BaseT to the server) and try to open a bunch of SMTP connections (by
just typing "telnet sh1 smtp" and then quit as fast as I can).
Sometimes I get a connection refused.
People have been noticing this when they try to send mail using their
Windows clients. They will get an error, but if they try again, it will
go through.
I also have a monitoring program going (mon, a nice little program from
http://consult.ml.org/~trockij/mon/), and I have it checking ping, DNS,
FTP, SMTP, HTTP, and POP3 every 5 minutes, and it periodically fails on
FTP and SMTP (but not ever on the rest unless there is a real problem).
I can't see what making a minor upgrade of Apache could do to cause
this, but this all started the same day I did that. I know about the
FIN_WAIT2 problem some OSs have with Apache, but it shouldn't be a
problem with Linux, should it? Also, if it was, it would have been a
problem with 1.2.3 as well.
-- Chris Adams - cadams@ro.com System Administrator - Renaissance Internet Services I don't speak for anybody but myself - that's enough trouble.