HP-UX Mailing Services Administrator's Guide (B2355-91064)

You can disable identd to improve the performance of the system by commenting
out this entry. The following sections discuss disabling identd:
• “Disabling identd on the Remote Client” (page 78)
• “Disabling identd from the Sendmail Server” (page 78)
Disabling identd on the Remote Client
You must comment out the following line in the/etc/inetd.conf file in the client
system, by placing a pound sign (#) in the first column as follows:
#auth stream tcp wait bin /usr/lbin/identd identd
The previous command denotes an IPv4 enabled system. If the system is IPv6 enabled,
then you must comment out the following line:
#auth stream tcp6 wait bin /usr/lbin/identd identd
Then, execute the command inetd -c to restart the inetd daemon in the client
system, thereby forcing inetd to reread the inetd.conf file.
Disabling identd from the Sendmail Server
This is probably an easier way of disabling identd, because you need not be concerned
about the remote client having identd disabled. In the file /etc/mail/sendmail.cf
on the Sendmail server, modify the following entry:
#O Timeout.ident=5s
as
O Timeout.ident=0s
Now, you need to kill and restart Sendmail.
Support for Secured Mail Transaction Using STARTTLS
Start Transport Layer Security (STARTTLS) is the SMTP command to enable Secure
Socket Layer (SSL). Transport Layer Security (TLS) provides authentication
(identification), privacy, confidentiality, and integrity for securing a mail transaction.
TLS uses different STARTTLS algorithms for encryption, signing, and message
authentication.
The STARTTLS configuration uses the following variables:
UseTLS
Enables the TLS handshake in the SMTP
transaction. You can set this variable to either
78 Configuring and Administering Sendmail