Thanks for the replies. The system is not using tcpwrappers, and it's also not a DNS issue. The client PC does have a reverse DNS entry. A tcpdump packet capture on the server shows the initial connection from the client followed by a bunch of DNS traffic, all within the same second. Then nothing happens for exactly 5 seconds, then the server sends data back to the client.
Just to be extra sure, I added an entry for it in /etc/hosts so DNS wouldn't even be needed. Still made no difference. Thanks, Dave On Mon, Jan 12, 2015 at 4:21 PM, Chris Davies <[email protected]> wrote: > David Parker <[email protected]> wrote: > > We have an SMTP server running Sendmail 8.14.4-4 on Debian 7 64-bit. > > > Kaccess hash -T<TMPF> /etc/mail/access > > # FEATURE(`access_db', `hash -T<TMPF> /etc/mail/access', `skip')dnl > > > For some reason, I just can't get it to not pause when greeting external > > (non-localhost) connections. [...] > > if I test from another PC on our network, it connects, pauses for 5 > > seconds, and then prints the SSL information. > > Does your PC have an rDNS entry, and if not could this delay be a DNS > lookup timeout? > > Chris > > > -- > To UNSUBSCRIBE, email to [email protected] > with a subject of "unsubscribe". Trouble? Contact > [email protected] > Archive: https://lists.debian.org/[email protected] > > -- Dave Parker Systems Administrator Utica College Integrated Information Technology Services (315) 792-3229 Registered Linux User #408177
