Dynamic DNS Not Working on Specific Network

[Ginger Penguin]

Hi all. I connect back to my server at home a lot most of the time using Tailscale. Occasionally that fails which I've since learned is most likely due to the local network I'm on using the same IP range as my home network. No matter, the main thing I need to access I can use the dynamic DNS server set up on my router (Asus AC68U) and that always works. Except on this one new network I'm on a lot now.

 

Most of the time it just errors out but very occasionally it'll get through. Tailscale gets around it perfectly and I can even key in my public IP with the forwarded port and it'll work without Tailscale. If I ping the dynamic DNS, it even resolves to the public IP anyway so I'm not sure why I can't get through. I thought it could just be that one machine but I tried it on my phone as well and had the same issue. 

 

Anything I can look for to troubleshoot the issue?

[Sir Asvald]

On 5/29/2025 at 11:50 PM, Ginger Penguin said:

Occasionally that fails which I've since learned is most likely due to the local network I'm on using the same IP range as my home network.

Not a good idea, recommended to use separate IP ranges. Mostly likely the cause of your DNS issues.

[Ginger Penguin]

7 hours ago, Sir Asvald said:

Not a good idea, recommended to use separate IP ranges. Mostly likely the cause of your DNS issues.

That's not really something I have control over outside of my home network. I will at some point redo all my networking and choose something that isn't 192.168.1.x and then that won't be a problem unless I run into a network that also renamed theirs to the exact same scheme. The network in question here also doesn't use that so it's not the issue in this case.

[Sir Asvald]

On 6/3/2025 at 12:07 AM, Ginger Penguin said:

That's not really something I have control over outside of my home network. I will at some point redo all my networking and choose something that isn't 192.168.1.x and then that won't be a problem unless I run into a network that also renamed theirs to the exact same scheme. The network in question here also doesn't use that so it's not the issue in this case.

Your only option is change your internal network or create a new VLAN (depends on your current network setup)

 

 

[LIGISTX]

On 6/2/2025 at 4:07 PM, Ginger Penguin said:

That's not really something I have control over outside of my home network. I will at some point redo all my networking and choose something that isn't 192.168.1.x and then that won't be a problem unless I run into a network that also renamed theirs to the exact same scheme. The network in question here also doesn't use that so it's not the issue in this case.

Change to something way different. Lots and lots of options… 

 

https://en.m.wikipedia.org/wiki/Private_network#Private_IPv4_addresses