TIP:
Disable ALL of the ALGs unless you have read the implementation information for them as about half of them block there respective traffic type if they have not been configured.
Some examples of sideeffects:
- Random DNS failure (DNS ALG)
- Cisco IP phones fail to register (SIP ALG)
- Tandberg Video conference devices fail to connect (H323 ALG)
They are useful if you use them right, but by default if you haven't researched and configured them they will cause you problems.