This Guide is n00b friendly, meaning if you're new at networking, this Guide is for you!
* Alert : Firefox 64x might not be able to see your modem, so dont use it in this Guide,
* don't reboot the router\modem with out saving the changes, make sure you submit,
* if you have to use the telnet part of this Guide, you will be one of the unlucky users who wont be able to turn off there modem, if there is a power cut, or the modem is rebooted by mistake, you will have to repeat steps 14) to 19) it's recommend that you skip steps 14) to 19) when you 1st try this Guide, if your router supports it, you will be able to see the modem on the network with out the telnet fix, if you dont, then you will have to try with the telnet fix, but it wont be a permanent solution for you i'm afraid
* Steps 21) 26) will be the hardest part of this Guide, Hint! take a look at Steps 21) 26) before you begin, to see if your router can run the commands
You will need :
1) HG612 Modem with the unlocked firmware on it -
http://www.kitz.co.uk/routers/hg612unlock.htm2) DD-WRT or Tomato firmware on any router that supports it (This Guide used the R7000, so follow this Guide if northing else works)
3) Good old ethernet cable
4) Determination <-- This ones very important
Once you have all of that, you may follow this Guide
1) connect the ethernet cable to the HG612 Modem second LAN port "LAN2" then the other end to your computer (Make sure your WIFI is off, or you have disconnected from your routers network)
2) Open Control Panel - Networking and Internet - View network status and tasks (Next to "connections:" click on Ethernet X) Where X is may be a 1 or 2 and so on
3) Click properties then double click "Internet Protocol Version 4 (TCP/IPv3)"
4) Click "Use the following IP address:"
5) Enter in the ip address box
192.168.1.100
then simply press enter in the "Subnet mask" box, which should fill it in for you (225.255.255.0) then press "OK" and "OK" again, please make sure you press OK both times in both boxies,
6) Open internet Explorer or the New Microsoft Edge (don't try to use anything else)
7) Enter
192.168.1.1
in the address bar of your browser and press enter
8) Type in
admin
for the user name and
admin
for the password, Press "Login"
9) Click Basic then WAN, look for "Port binding:" and untick LAN1 and LAN2 if LAN2 is unticked, leave it unticked, now click Submit
10) Now staying on the Basic Tab, click on "LAN" which you will find under WAN (the one your on)
11) On "LAN Host Settings" click on "IP address:" and change
192.168.1.1
in to
192.168.3.1
Now again press Submit, after you have waited 20 seconds, you should find the page has stopped working, dont press anything
12) On the address bar, enter
192.168.3.1
the page should load, if it dont, wait 1 minute, for the settings to take effect, then try again
13) You dont need to login, if the modems interface shows up, you know how to get to it and that it's working, it will always be at 192.168.3.1
14 Might be optional) install telnet,
http://www.technipages.com/windows-10-enable-telnetopen a administrator command prompt (you can skip to 19) if your feeling lucky, some routers dont need this step for the modem
15) Enter
telnet 192.168.3.1
press enter,
16) Enter
sh
17) Enter the following lines, One By One, making sure you dont mess any up, or miss any :
iptables -I INPUT_SERVICE_ACL -i br1 -s 192.168.3.253 -p ICMP -j ACCEPT
iptables -I INPUT_SERVICE_ACL -i br1 -s 192.168.3.253 -p TCP --dport 80 -j ACCEPT
iptables -I INPUT_SERVICE_ACL -i br1 -s 192.168.3.253 -p TCP --dport 23 -j ACCEPT
iptables -t nat -I PRE_SERVICE_ACL -i br1 -s 192.168.3.253 -p ICMP -j ACCEPT
iptables -t nat -I PRE_SERVICE_ACL -i br1 -s 192.168.3.253 -p TCP --dport 80 -j ACCEPT
iptables -t nat -I PRE_SERVICE_ACL -i br1 -s 192.168.3.253 -p TCP --dport 23 -j ACCEPT
18) Type
exit
then exit then exit one last time
19 Start here if you skiped 14) disconnect ethernet, and connect to your router by wifi or connect to your router by ethernet, making sure to edit the settings we changed in 2) back to "Obtain an IP address automatically"
20) Open internet Explorer or the New Microsoft Edge (don't try to use anything else)
21) Type in your routers address
192.168.1.1
22) Type in
admin
for the user name or if that doesn't work, try the user name as root then :
admin
for the password then press login
23) Click Administrator - Command (you should be seeing the Diagnostics/Command Shell
24) Paste in
ifconfig vlan2:1 192.168.3.253 netmask 255.255.255.0
iptables -t nat -I POSTROUTING ! -s $(nvram get lan_ipaddr) -d 192.168.3.0/24 -j SNAT --to 192.168.3.253
25) Then press Save Startup or if you have a different router, carry on reading
try the following bellow, however dont (Save Startup) Run Command instead, then go to 192.168.3.1, if nothing shows up, try the same command I use above, if both commands show zip, it's not worked sadly,
ifconfig eth0:1 192.168.3.253 netmask 255.255.255.0
iptables -t nat -I POSTROUTING ! -s $(nvram get lan_ipaddr) -d 192.168.3.0/24 -j SNAT --to 192.168.3.253
if you see the modem, then it has worked, press Save Startup
but if it hasn't - go to command prompt on the computer and type telnet 192.168.1.1 then sh then ifconfig, try and find the WAN port name and change the command, if you dont know how to do it, you will have to message someone, or comment, to clear the router of any settings sent by telnet, reboot it,
26) Press Management, then press reboot
27) You should now have access to 192.168.3.1 allowing you to view the modem
* I and the whole of KITZ are not responsible for any damages that may happen, because of you following this Guide, anything you enter, you enter at your own risk
* Admin KITZ and Mod friends, may edit this post at any time, to correct spelling and mistakes, hopefully i've corrected them all

respect the mods
* Good luck
* This Guide was made by SignedAdam, Chrysalis, Dray, and friends
* Take alook at the work behide this Guide
http://forum.kitz.co.uk/index.php/topic,17645.0.html