What is the primary method of mitigating port redirection attacks?

A.
Keep firewalls up to date with the latest patches and fixes.

B.
Do not allow trust models.

C.
Keep OS and applications up to date with the latest patches and fixes.

D.
Use proper trust models.

Explanation:
Port redirection can be mitigated primarily through the use of proper trust models (as mentioned earlier). If we assume that a system is under attack, host-based IDS can help detect and prevent a hacker installing such utilities on a host.
Ref: Safe white papers;page 70
SAFE: Extending the Security Blueprint to Small, Midsize, and Remote-User Networks Reference: Cisco Courseware page 2-28