On Thu, 8 Oct 1998, Graham Alston wrote:
> It seems that sendmail is trying to make a connection to port 25 (smtp)
> of various hosts as it has mail queued up for them. It will do this
> every 30 minutes as it tries to clear its queue, thus causing diald to
> continue to trigger every 30 minutes.
That's the way it's supposed to work. Actually, I think there's an
"exponential backoff" in sendmail, but it has a granularity of 15 minutes
(depending on startup options; -q15m for example).
If you don't want to be dialing out every half hour to contact lame mail
exchangers, you can set sendmail to relay to another sendmail on a "smart
host" with a permanent internet connection. e.g. put something like
"DSaddress.of.smart.host" in your sendmail.cf. Make sure you have the
permission of the administrator of the system through which you wish to
relay. Many ISPs provide this service.
> 1. What is the SYN packet?
> 2. Why does sendmail cause rule 1 to be accepted?
Read a book on TCP/IP if you want a good answer to these questions.
> 3. Can I just remove rule 1 to fix this problem?
No user serviceable parts here. Don't remove rule 1. You can add rules
for new protocols to the appropriate locations in the filter file or
change timeouts, but don't mess with its basic structure.
Ed
--
Ed Doolittle <mailto:[EMAIL PROTECTED]>
"Everything we do, we do for a reason." -- Peter O'Chiese
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