ALG

Alg ALG. exe What is that ?

Application Layer Gateway service found only on Windows XP.

ALG is an integral part of :‐

ICS (Internet Connection Sharing) and ICF (Internet Connection Firewall) in Windows XP.

Microsoft’s description is : ‐

ʺProvides support for 3rd Party protocol plug‐ins for ICS and ICFʺ.

My Recommendation is :‐

If you use Windows XP’s Internet Connection Firewall, you must have ALG running.

If however you use a 3rd Party firewall,

Set ALG to Manual in ʺControl Panel > Administrative Tools > Servicesʺ.