Been with Vodafone a little over 6-7 weeks and I am surprised everyday!
Couple of days back 1st Oct somehow the wifi password had been changed mysteriously and today internet was playing up.
So I thought I would do a port check to make sure my internet is secure etc. I used the excellent shields up tool from grc here click common ports https://www.grc.com/x/ne.dll?bh0bkyd2
Was very surprised to find that port 80 and 443 were open! Navigate to my public ip address and can see the router home page omg!
And then my internet really stopped working but the telephone and Vodafone sky still worked perfectly. Spent a wasted hour on phone with Vodafone technical support turning stuff on and off...cause you know this is the magic cure for all ailments! Anyway after being told there is nothing more they can do and basically to go away and sort it out myself. Anyway 10 minutes after hanging up internet starts working again arrrrrrrrrrghhhhhhhhhh!!
So back to sorting out this port issue and other mysteries, first thing I did was download and upgrade firmware from here HG659-13V100R001C206B019_main.bin http://help.vodafone.co.nz/app/answers/detail/a_id/24400/~/upgrading-the-vodafone-homehub-%28hg659%29-firmware-to-the-latest-version
Previously was on the B009 version I think...
Went smoothly no issues except for admin password changing. Do another port check and surprise the ports are now in stealth mode by default great!
I did read a few posts from Vodafone on forum and Twitter saying having this port open is perfectly safe and secure nothing can go wrong.....closing this means WE can't help you. Yeah right Vodafone support had no idea what they were doing and having access to router made no difference.
Repeat NEVER EVER expose open ports to the internet ESPECIALLY port 80 and 443 to YOUR router unless you know what you are doing! <rant over>
Edit more rant: Changing Admin password disables pasting into password fields another FAIL, however does allow you to paste when logging in so good (I use 1Password). Read here for why disabling pasting is bad http://www.troyhunt.com/2014/05/the-cobra-effect-that-is-disabling.html