Detections
Analytics

SLEM-05-253040 - SLEM 5 must not be performing Internet Protocol version 4 (IPv4) packet forwarding unless the system is a router.

Information

Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this software is used when not required, system network information may be unnecessarily transmitted across the network.

Solution

Configure SLEM 5 to not performing IPv4 packet forwarding by running the following command as an administrator:

 > sudo sysctl -w net.ipv4.ip_forward=0

If "0" is not the system's default value, add or update the following line in "/etc/sysctl.d/99-stig.conf":

 > sudo sh -c 'echo "net.ipv4.ip_forward=0" >> /etc/sysctl.d/99-stig.conf'

 > sudo sysctl --system

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_SLEM_5_V1R4_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-261319r996427_rule, STIG-ID|SLEM-05-253040, Vuln-ID|V-261319

Plugin: Unix

Control ID: 3811b41dd2483915f0df0fee17d6eda5195699965aaab0f6bad75449475b67c1