Chapter 6. Importing and Synchronizing52allowed_iss_slaves=By default, no slave Satellites are specified to sync from the master server, so you must enter thehostname of each slave Satellite server, separated by commas. For example:allowed_iss_slaves=slave1.satellite.example.org,slave2.satellite.example.orgOnce you finished configuring the rhn.conf file, restart the httpd service by issuing the followingcommand:service httpd restart6.4.3. Configuring the Slave RHN Satellite ServersTo configure RHN Satellite slave servers for Inter-Satellite Sync, ensure that you have the ORG-SSLcertificate from your master RHN Satellite server so you can securely transfer content. This can bedownloaded over http from the /pub/ directory of any Satellite. The file is called RHN-ORG-TRUSTED-SSL-CERT, but can be renamed and placed anywhere on the slave Satellite, such as the /usr/share/rhn/ directory.For information about SSL configuration for use with RHN Satellite, refer to Chapter 3, "SSLInfrastructure" in the RHN Satellite Client Configuration GuideOnce the SSL certificate is placed on the slave server, you can see the list of channels availableto sync from the master Satellite server by running the following command (replacing themaster.satellite.example.com with the hostname of the master Satellite server):satellite-sync --iss-parent=master.satellite.example.com --ca-cert=/usr/share/rhn/RHN-ORG-TRUSTED-SSL-CERT --list-channelsThis command lists both Red Hat Network Hosted channels as well as any custom channels availableon the master Satellite server.6.5. Using Inter-Satellite SyncNow that Inter-Satellite Sync is configured, you can now use it to synchronize channels from themaster Satellite to the slave servers.On the slave servers, configure the Master server hostname and SSL certificate file path in thefollowing lines of the /etc/rhn/rhn.conf file:iss_parent = master.satellite.domain.comiss_ca_chain = /usr/share/rhn/RHN-ORG-TRUSTED-SSL-CERTThen run the satellite-sync command by typing:satellite-sync -c your-channel