Tag Archives: CTF

Linksys Reverse NAT Loopback

I was a bit annoyed when I got my EA6900, Seems Linksys in their insane wisdom have disabled the ability to do Reverse Nat Loopback (call an ‘internal’ service using it’s internet name).

That HAD to be fixed, I can’t be bothered modifying host files every time I come home etc, just to access the services at home.

It seems Linksys have a reason for it (that basically means the hacker already has control of your router anyhow, so not really a security issue!) Here’s the reason JFYI

Here’s how to disable the ‘blocking’ of doing the Reverse NAT Loopback…..

linksysEA6900

 

That’s right! just disable the default setting for Cut Through Forwarding, it’s actually a pain anyway if devices don’t meet 100% spec on some protocols, and causes lag in some streaming services (iPlayer stuttered with it, doesn’t without!)

Linksys don’t actually know 100% what it does anyhow, because it’s actually a chipset setting (Broadcom) so other routers have the feature as well, some call it “Hardware Acceleration” others “CTF” but it’s all just enabling  ctf.ko in the kernel load of the device.

Just turn it off, no problems then, and the supposed benefits wont be seen on any standard UK broadband network anyhow, and I’m on 152/15.