Why does my Red Hat Network Proxy after update or installation not work?

Environment

• Red Hat Network Satellite 5.4 that was recently upgraded from version 5.3 (deployments possible)

• Red Hat Network Proxy on Red Hat Enterprise Linux 5 (deployments of Red Hat Enterprise Linux 4u5 possible)

Resolution 1

Complete reinstallation of RHEL5 on the proxy, then new setup of the proxy applications. This time fixing the points causing problems:

• using a fully qualified domain name for the server
• for proxy configuration using the Red Hat Satellite's fully qualified name

Resolution 2

This is an approach to fix the existing installation that was configuring the proxy using the Satellite's IP:

• shutdown the proxy service: /usr/sbin/rhn-proxy stop
• remove the squid caches: rm -fv /var/spool/squid/*
• cleanup the rhn proxy hostname: vi /etc/sysconfig/network, set hostname to 'hostname.full.domain' there
• configure the /etc/hosts file as instructed in the Proxy Installation Guide . If you have multiple network interfaces the IP/hostname of the interface used to offer proxy services should appear above lines containing the other interfaces IPs.
• set the new hostname also on the running host: hostname hostname.full.domain.name
• Remove the RHN proxy registration from the satellite, also the proxy configchannel
• Now start the setup process in running configure-proxy.sh as documented in the Proxy Installation Guide and pay attention to use fully qualified names when referring to the proxy and the satellite