I forgot to mention that the client box can send email to the wild wild
internet.
Sam Wun wrote:
> I have installed qmail server in my FreeBSD 4.1.1-stable box, I've also
> got tcpserver, courier-imap running, ipfilter and IPsec running as well.
> IPsec is running between my cllient and server box. The following
> diagram illustrate the my basic networking:
>
> Client (FreeBSD 4.1-stable) -> Server (FreeBSD 4.1.1-stable) ->Internet
> (sendmail) (Qmail server)
> sec.rock.com fastline.rock.com
>
> I don't think ipfilter and IPSec blocks the connection, because server
> box (FreeBSD 4.1.1-stable) can send email to the client machine (FreeBSD
> 4.1-stable). The problem is the client box cannot send email to the
> server. Whenever it sends email, an error msg will be raised by sendmail
> with the "Connection reset by server" err msg. Besides, server can
> client can ping each other, and client can ping and lynx outside wild
> wild internet websites. I can send emails within my server box. email
> can be sent to theh client box.
>
> Here is the error msg from /var/log/maillog:
> Oct 2 14:58:04 sec sendmail[2205]: e91M8Zv00283:
> [EMAIL PROTECTED], ct
> laddr=swun (1000/1000), delay=05:49:29, xdelay=00:00:00, mailer=esmtp,
> pri=12008
> 14, relay=fastline.rock.com., dsn=4.0.0, stat=Deferred: Connection reset
> by fast
> line.rock.com.
>
> My nmap -v in my client machine shows:
> Port State Service
> 22/tcp open ssh
> 25/tcp open smtp
> 111/tcp open sunrpc
> 587/tcp open submission
>
> Nmap -v in the server machine shows:
> Port State Service
> 22/tcp open ssh
> 25/tcp open smtp
> 53/tcp open domain
> 110/tcp open pop-3
> 143/tcp open imap2
> 5432/tcp open postgres
> 6000/tcp open X11
>
> I run tcpserver with:
> /usr/local/bin/tcpserver -x/usr/local/etc/tcp.smtp.cdb \
> -u$QMAILDUID -g$NOFILESGID 0 smtp /var/qmail/bin/rblsmtpd\
> /var/qmail/bin/qmail-smtpd 2>&1 &
>
> The portmap_enable and sendmail_enable are set to NO in file
> /etc/rc.conf.
>
> Can anyone tell me what may be wrong with it?
>
> Thanks
> Sam.
