General-purpose systems typically have their network and routing information configured statically by a system administrator. Workstations or some special-purpose systems often use DHCP (instead of IRDP) to retrieve dynamic network configuration information.
Run the following command to verify "rdisc" is disabled through current runtime configuration:
# service rdisc status
If the service is disabled the command will return the following output:
rdisc is stopped
If the service is running, this is a finding.
Fix Text (F-43599r2_fix)
The "rdisc" service implements the client side of the ICMP Internet Router Discovery Protocol (IRDP), which allows discovery of routers on the local subnet. If a router is discovered then the local routing table is updated with a corresponding default route. By default this daemon is disabled. The "rdisc" service can be disabled with the following commands: