What does "Fast Forwarding" do on a USG40?

xsentinel

• I have a USG40 that has worked well for a long time, but recently my internet speed has been increased and I noticed that the USG40 is not fast enough. I get around 150mb/s through the USG40 but if I connect directly to the modem I get over 300mb/s, so the USG is obviously the problem.

I do not have any of the UTM features enabled such as anti-virus or anything like that. I have never had any subscription services enabled.

I did find a setting that seems to help:
configuration->system->advanced->fast forwarding

If I enable "Fast Forwarding" I get full speed, but I do not know exactly what that setting does so I am afraid to use it. Obviously it is bypassing something but I don't know exactly what or how it effects my security.
Can someone please explain what exactly this setting bypasses and does not bypass so I can make a better decision to use it or not?
Many thanks.

Zyxel_Melen

Hi @xsentinel,

Please reference the below screenshot from User's Guide:

Hope it helps.

xsentinel

Thank you. I did see that in the help file but unfortunately that does not answer my question. Or at least I do not completely understand that because that is from a technical perspective and not quite what I was looking for.

What I want to know is what is disabled or bypassed by enabling this setting? Is it only UTM stuff and some logging, or is there more? Are there firewall or security things that are bypassed such as SPI or something important like that?

The reason I ask is because I do not have anti-virus or anything like that enabled, so if that is all that is bypassed then I am OK with that as I don't use it anyway.

Thank you.

PeterUK

"Fast Forwarding" more or less makes it like a home router so things like firewall, NAT will work but other stuff like BWM and VPN will not from what know.

There is a logging you can disable without enabling "Fast Forwarding" that can make the USG40 faster.
Monitor > system status > traffic Statistics uncheck Collect Statistics