F5F Stay Refreshed Power Users Networks Add more space on your internet address.

Add more space on your internet address.

Add more space on your internet address.

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Boredbear
Junior Member
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5
07-11-2026, 09:23 AM
#1
Hi, I work at a small resort or company. My old IT guy set up a DHCP server using Kerio Control to connect three networks: the private LAN (LAN 0), the private guest network (LAN 1), and the guests' room network (LAN 2). The private internal network uses the address range 192.168.55.x with a subnet mask of 255.255.255.0, and it has about 100 leased addresses. There is no problem here because very few devices connect to this part inside the resort.

The guest network uses the range 192.168.40.x with a subnet mask of 255.255.255.0, but it constantly runs out of IP addresses even though we lease them for 24 hours only. This Guest Network is used by all employees and guests in the resort and restaurant. New people arriving at the hotel cannot connect to Wi-Fi because they keep getting an error saying "No IP Allocation" or that they can't get an address. I have to remove some unused IPs from my server before a new device can join. How do I add more IP addresses on this Guest Network? I read about something called subnetting and superscoping, but nobody explained it in simple terms. Thanks so much in advance - Tiago
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Boredbear
07-11-2026, 09:23 AM #1

Hi, I work at a small resort or company. My old IT guy set up a DHCP server using Kerio Control to connect three networks: the private LAN (LAN 0), the private guest network (LAN 1), and the guests' room network (LAN 2). The private internal network uses the address range 192.168.55.x with a subnet mask of 255.255.255.0, and it has about 100 leased addresses. There is no problem here because very few devices connect to this part inside the resort.

The guest network uses the range 192.168.40.x with a subnet mask of 255.255.255.0, but it constantly runs out of IP addresses even though we lease them for 24 hours only. This Guest Network is used by all employees and guests in the resort and restaurant. New people arriving at the hotel cannot connect to Wi-Fi because they keep getting an error saying "No IP Allocation" or that they can't get an address. I have to remove some unused IPs from my server before a new device can join. How do I add more IP addresses on this Guest Network? I read about something called subnetting and superscoping, but nobody explained it in simple terms. Thanks so much in advance - Tiago

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bkelton
Member
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211
07-24-2026, 10:25 PM
#2
You probably don't want a long-term rental for a guest Wi-Fi spot; it's too expensive and takes up space. You can get more room in your network settings if you fix things right. I haven't seen Kerio software, so that app isn't the best place to start.
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bkelton
07-24-2026, 10:25 PM #2

You probably don't want a long-term rental for a guest Wi-Fi spot; it's too expensive and takes up space. You can get more room in your network settings if you fix things right. I haven't seen Kerio software, so that app isn't the best place to start.

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ZexyZeke
Member
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166
07-24-2026, 11:02 PM
#3
Just update your subnet mask on the 192.168.40.x network to use 255.255.252.0 instead. This will make you have four times as many IP addresses. You'll also need to tell your DHCP server where that range of numbers goes so it can give them out properly.
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ZexyZeke
07-24-2026, 11:02 PM #3

Just update your subnet mask on the 192.168.40.x network to use 255.255.252.0 instead. This will make you have four times as many IP addresses. You'll also need to tell your DHCP server where that range of numbers goes so it can give them out properly.

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rezerxtheboss
Member
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78
07-25-2026, 03:28 AM
#4
It's best to shorten your lease, switch your team to a different network, or even use a private one if needed. If that doesn't work, hire a pro to design something that fits your needs. Are you just looking for answers here?
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rezerxtheboss
07-25-2026, 03:28 AM #4

It's best to shorten your lease, switch your team to a different network, or even use a private one if needed. If that doesn't work, hire a pro to design something that fits your needs. Are you just looking for answers here?

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