If you start receiving an email on your root account from certwatch that looks like this:
################# SSL Certificate Warning ################
Certificate for hostname ‘rune.sunaj-home.org’, in file (or by nickname):
/etc/pki/tls/certs/localhost.crt
The certificate needs to be renewed; this can be done
using the ‘genkey’ program.
Browsers will not be able to correctly connect to this
web site using SSL until the certificate is renewed.
##########################################################
Generated by certwatch(1)
Then you need to generate a new cert for your system. The command is as follows:
openssl req -new -days 365 -x509 -nodes -out /etc/pki/tls/certs/localhost.crt -keyout /etc/pki/tls/private/localhost.key
http://stevejenkins.com/blog/2010/08/renewing-a-self-signed-ssl-certificate-on-fedoracentos