To Bill and others who responded: Thanks for the help. As I said, it was an "intellectual curiosity" question. SIMS continues to work fine!
Peter ----- Original Message ----- From: "Bill Cole" <[EMAIL PROTECTED]> To: "SIMS Discussions" <[EMAIL PROTECTED]> Sent: Saturday, November 02, 2002 5:37 PM Subject: Re: Result Codes > At 1:18 PM -0500 11/2/02, Peter Jones imposed structure on a stream > of electrons, yielding: > >Intellectual curiosity-type question: > > > >I think I've figured out most of the error codes in SIMS, but the following > >has me a bit puzzled. I believe what I have here is a spammer [ > >[EMAIL PROTECTED] ] testing for open relays by trying to relay to itself. > >SIMS defeated him, no problem! > > > >Question #1: what is the meaning of the *Status codes? Does SIMS generate > >these or are they from OT? I see status 34, 22, 21, 25, 26, 23, 29, 1, and 2 > >within the transaction. > > Those are SIMS internal status codes, and are not dumented anywhere > that I've seen. > > >Question #2: I was under the impression that SMTP used port 110 and POP3 > >uses port 25. > > Other way around. > > > But our spammer friend comes over on port 4558. How did he get > >through the firewall (IPNR on Mac), which has does not have this port > >enabled? > > Each end of any TCP connection has an IP address and port number. > Your end is on the SMTP port, 25. The other end is almost always > going to use some arbitrarily chosen high port number, such as 4558. > Typically a firewall set to support internal servers lets through > traffic aimed at the server's port number (typically a low-numbered > port, as those are the ports which have been assigned to most common > services) from any port on a remote IP address. Both ends are not > required to use the standard port reserved for a protocol, and on > many OS's that wouldn't be possible since the low ports are > restricted to use by 'root' on anything Unix-like. > -- > Bill Cole > [EMAIL PROTECTED] > > > ############################################################# > This message is sent to you because you are subscribed to > the mailing list <[EMAIL PROTECTED]>. > To unsubscribe, E-mail to: <[EMAIL PROTECTED]> > To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> > To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> > Send administrative queries to <[EMAIL PROTECTED]> > > ############################################################# This message is sent to you because you are subscribed to the mailing list <[EMAIL PROTECTED]>. To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
