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The administrator must ensure that the maximum hop limit is at least 32.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-30617 | NET-IPV6-059 | SV-40388r1_rule | ECSC-1 | Low |
| Description |
|---|
| The Neighbor Discovery protocol allows a hop limit value to be advertised by routers in a Router Advertisement message to be used by hosts instead of the standardized default value. If a very small value was configured and advertised to hosts on the LAN segment, communications would fail due to hop limit reaching zero before the packets sent by a host reached its destination. |
| STIG | Date |
|---|---|
| Infrastructure Router Security Technical Implementation Guide | 2013-10-08 |
Details
| Check Text ( C-39212r1_chk ) |
|---|
| Review the router or multi-layer switch configuration to determine if the maximum hop limit has been configured. If it has been configured, then it must be set to at least 32. If it has not been configured, you must determine what the default value is. |
| Fix Text (F-34363r1_fix) |
|---|
| If the maximum hop limit is configured, it must be set to at least 32. |