Here is the contents of my /etc/sysconfig/rhn/up2date file:
[root@MMME1 rhn]# cat up2date
# Automatically generated Red Hat Update Agent config file, do not edit.
# Format: 1.0
networkSetup[comment]=None
networkSetup=1
retrieveOnly[comment]=Retrieve packages only
retrieveOnly=0
enableRollbacks[comment]=Determine if up2date should create rollback rpms
enableRollbacks=0
pkgSkipList[comment]=A list of package names, optionally including wildcards, to skip
pkgSkipList=kernel*;
storageDir[comment]=Where to store packages and other data when they are retrieved
storageDir=/var/spool/up2date
adminAddress[comment]=List of e-mail addresses for update agent to communicate with when run in batch mode
adminAddress=root@localhost;
noBootLoader[comment]=To disable modification of the boot loader (lilo, silo, etc)
noBootLoader=0
serverURL[comment]=Remote server URL
serverURL=https://xmlrpc.rhn.redhat.com/XMLRPC
fileSkipList[comment]=A list of file names, optionally including wildcards, to skip
fileSkipList=;
sslCACert[comment]=The CA cert used to verify the ssl server
sslCACert=/usr/share/rhn/RHNS-CA-CERT
noReplaceConfig[comment]=When selected, no packages that would change configuration data are automatically installed
noReplaceConfig=1
noReboots[comment]=Disable the reboot actions
noReboots=None
useNoSSLForPackages[comment]=Use the noSSLServerURL for package, package list, and header fetching
useNoSSLForPackages=0
systemIdPath[comment]=Location of system id
systemIdPath=/etc/sysconfig/rhn/systemid
enableProxyAuth[comment]=To use an authenticated proxy or not
enableProxyAuth=0
retrieveSource[comment]=Retrieve source RPM along with binary package
retrieveSource=1
versionOverride[comment]=Override the automatically determined system version
versionOverride=
headerFetchCount[comment]=The maximimum number of rpm headers to fetch at once
headerFetchCount=10
networkRetries[comment]=Number of attempts to make at network connections before giving up
networkRetries=5
enableProxy[comment]=Use a HTTP Proxy
enableProxy=1
proxyPassword[comment]=The password to use for an authenticated proxy
proxyPassword=
noSSLServerURL[comment]=Remote server URL without SSL
noSSLServerURL=http://xmlrpc.rhn.redhat.com/XMLRPC
keepAfterInstall[comment]=Keep packages on disk after installation
keepAfterInstall=1
proxyUser[comment]=The username for an authenticated proxy
proxyUser=
removeSkipList[comment]=A list of package names, optionally including wildcards
that up2date will not remove
removeSkipList=kernel*;
useGPG[comment]=Use GPG to verify package integrity
useGPG=1
gpgKeyRing[comment]=The location of the gpg keyring to use for package checking
gpgKeyRing=/etc/sysconfig/rhn/up2date-keyring.gpg
debug[comment]=Whether or not debugging is enabled
debug=0
httpProxy[comment]=HTTP proxy in host
ort format, e.g. squid.redhat.com:3128
httpProxy=http://www.ncl.ac.uk/default.pac
headerCacheSize[comment]=The maximum number of rpm headers to cache in ram
headerCacheSize=40
forceInstall[comment]=Force package installation, ignoring package, file and config file skip list
forceInstall=0
noReboot[comment]=Disable the reboot action
noReboot=0