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IP forwarding for IPv4 must not be enabled, unless the system is a router.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-12023 | GEN005600 M6 | SV-38186r1_rule | ECSC-1 | Medium |
| Description |
|---|
| If the system is configured for IP forwarding and is not a designated router, it could be used to bypass network security by providing a path for communication not filtered by network devices. |
| STIG | Date |
|---|---|
| MAC OSX 10.6 Workstation Security Technical Implementation Guide | 2012-01-30 |
Details
| Check Text ( C-37606r1_chk ) |
|---|
| Open a terminal session and enter the following command. sysctl -a | grep net.inet.ip.fw.enable If the value of "net.inet.ip.fw.enable" is not set to "0", this is a finding. |
| Fix Text (F-32848r1_fix) |
|---|
| Open a terminal session and edit the /etc/sysctl.conf file and add the following line. net.inet.ip.fw.enable=0 NOTE: If the sysctl.conf file does not exist use the following command to create one. touch /etc/sysctl.conf |