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2019-03-29 05:05 PM
Hi, I have Optus cable on a Netgear CG3000 v2 and need to change the LAN range of my private network. By default the LAN IP Range is 192.168.0.x but this conflicts with my work IP Range and I get up conflicts when connected by vpn.
To avoid these IP conflicts I'd like to change the LAN IP to something like 192.168.23.x (still a valid private class C IP Range). When I contacted Optus I spent 3 hours on the phone trying to explain what I wanted to do and they continually told me that I can't change my public ip as it's dynamic, i.e. completely misunderstood my request. I gave up after 5 techs, 4 phone calls and 3 hours
Basically when I go to the modem/router LAN IP page and try to change it I get the message "LAN IP and starting IP must be in the same network segment" this is in reference to the starting IP of the dhcp range which is managed on the same page. Unfortunately the dhcp values are not able to be changed (only the last value of the IP Range can be changed not and of the other IP segments).
How do I change my internal private network IP Range on a CG3000?
2019-03-30 08:34 PM
Any chance you could set the range to 150-250 and the LAN IP to 140? Leave 1-139 to your VPN etc.
I assume you have set the mask to 255.255.0.0? But if the DHCP range only has one data entry point then it sounds like you might be out of luck. Time to buy a better modem?
2019-03-30 09:26 PM - edited 2019-03-30 09:27 PM
Thanks Peter, I can't actually change the subnet mask either. It's 255.255.255.0. I'm guessing it's Optus firmware that has locked out all of the possibility for change?
I was hoping to avoid buying a modem and putting it in bridge mode. Disappointed that I can't change basic networking options, even more dissapointed that Optus support wasted 3 hours of my time.
2019-03-30 08:11 AM
Yes that is disappointing. The Optus service model does seem to rely very heavily on limiting support to very specific areas. Staff don't necessarily understand anything more than you but can run through scenarios. There are definitely competent individuals scattered about who understand the fundamentals but you have to luck out to get one. Unfortunately? the the staff are eager to try help and don't always admit they don't know what they don't know so you can spend a long time being transfered and going though it again and again.
In line with this OPtus seem to lock down their modem with custom firmware so that customers can't stray far and hopefullly customer service can help within those parameters.
Have you got v2 of the CG3000? Not sure if it has proper LAN options though.