> > > Which tcpdump version is this? Where are the time stamps and the > > > packets with data (Len>0)? > > > > tcpdump show only initial packet data by default and "-s0" show all > > data. Is usefull when decode HEX (-xX) or ASCII (-A) > > I repeat, there is no need to look at the data itself. > > However, this trace is worthless for the following reasons: > > 1) There are no time stamps, sequence numbers, IP addresses. > > 2) There is no information about packets that have data length > 0. > > And, with a thread that has one message per week, it might also help > to summarize what the problem was.
Sorry for the bad information that I have submitted! :-( I hope that this time they are correct (please, refer at http://80.74.176.104/dump_no_detail). Moreover I want to report some rows that describe shortly the problem that I have encountered: I can't identify the cause of impossibility to relay emails through my Postifix mail gateway, from a Outlook express client. > From mail log, I saw: > > postfix/smtpd[16988]: connect from unknown[xxx.yyy.www.zzz] > postfix/smtpd[16988]: 7B98D75008D: client=unknown[xxx.yyy.www.zzz] > postfix/cleanup[22797]: 7B98D75008D: > message-id=<[EMAIL PROTECTED]> > > From client side I get a pop-up window that points out problems with > server communication or even network.. And >> $ egrep 'postfix/cleanup\[22797\]|postfix/smtpd\[16988\]' >> /var/log/maillog >> > > Oct 29 10:27:58 av3 postfix/smtpd[16988]: connect from > unknown[xxx.yyy.www.zzz] Oct 29 10:27:58 av3 postfix/smtpd[16988]: > 7B98D75008D: > client=unknown[xxx.yyy.www.zzz] > Oct 29 10:34:25 av3 postfix/smtpd[16988]: timeout after DATA from > unknown[xxx.yyy.www.zzz] Oct 29 10:34:25 av3 postfix/smtpd[16988]: > disconnect from unknown[xxx.yyy.www.zzz] After the I would to investigate deeply about the cause and I have collected data with tcpdump for one problematic session: # tcpdump -s 0 -w /var/dump host <client> and port 25 And got the data showed at url above (hoping that this time they are the worth ones! ;-)) Thanks, rocsca
