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Router's ALG Config Settings
Posted: Wed Sep 04, 2013 4:27 pm
by Kaos Kid
Dayum this DIR-850L Router has MANY more settings than my old Linksys G Router. In one of my router config pages I see settings that say they are for VPNs. If I don't run VPNs, do I need these settings enabled? I also don't use skype or VOIP from my router. Is there any reason for me to keep the following settings enabled, and if not will I see any benefit to disabling them?
PPTP
IPSec (VPN)
SIP
Thanks!
Re: Router's ALG Config Settings
Posted: Sat Sep 07, 2013 9:10 pm
by skier
I would disable them, there may not be any noticeable difference but Routing overhead will be a little better
Re: Router's ALG Config Settings
Posted: Sat Sep 07, 2013 10:39 pm
by Kaos Kid
Cool, thanks Ski
Re: Router's ALG Config Settings
Posted: Mon Sep 09, 2013 7:12 am
by kenc51
ALG - Application Level Gateway
PPTP - Point to Point VPN = disable no problem
IPSec (VPN) - Client VPN - disable no problem
SIP - VoIP - disable no problem
Disabling the above will not mean you can't have VoIP or a VPN, it just makes it harder to setup.
The ALG is to allow this traffic to passthrough and the sessions to be monitored and controlled correctly - if there's no device / client on th lan requiring it you turn it off.
If won't help with performance though. ALG on our router takes up 8 bytes of memory
ALG is sort of like a pre-defined port forward (not quite) - it's a security feature
http://en.wikipedia.org/wiki/Application-level_gateway