The administrator must ensure the that all L2TPv3 sessions are authenticated prior to transporting traffic.
L2TPv3 sessions can be used to transport layer-2 protocols across an IP backbone. These protocols were intended for link-local scope only and are therefore less defended and not as well-known. As stated in DoD IPv6 IA Guidance for MO3 (S4-C7-1), the L2TP tunnels can also carry IP packets that are very difficult to filter because of the additional encapsulation. Hence, it is imperative that L2TP sessions are authenticated prior to transporting traffic.
Configure L2TPv3 to use authentication for any peering sessions.
Currently JUNOS does not support L2TPv3 so this vulnerability is not applicable.
Information Assurance Officer