How to configure a Nortel/Avaya 4550T-PWR switch – Part 2/2

NewtworkSchemaIn this part I’ll show the configuration steps to obtain the situation in this network schema. This is a really simple and real situation: a simple network using two separated VLAN one for Data and the other for Voip.

Att.: In this example for to keep everything simple, clear and practical we’ll use Asterisk PBX and Snom IP Phone, but the same considerations apply to other brands.

Att.: Generally it’s important that we separate the voip traffic from the data traffic so we’ll utilize two different VLANs: one VLAN will carry the data traffic destined to the desktop and server and the other will carry only the Voip/voice traffic. Continue reading

CentOS 5.5 and SendMail 8.13: Configure smarthost for using TLS

Step 1
Check if sendmail is compiled with TLS (for encryption) and SASL (for authentication). This is the command to use to check it.

#/usr/sbin/sendmail -d0.1 -bv root

You must read something like “Compiled with…STARTTLS”

Att.: If you’ve installed sendmail using yum, TLS support is present !

Step 2
Install all these packages

# yum install sendmail sendmail-cf cyrus-sasl-plain cyrus-sasl-md5

Step 3
Create certificates

# cd /etc/pki/tls/certs
# make sendmail.pem

Continue reading