Right now I have a subnet of 16 IPs. I want all of the ips to be "owned " by my firewall. I have a watchguard firewall statically configured with X.X.X.225 and has X.X.X.226 - 238 as Secondary IPs.
This has been working fine for a few months, but last week, I could only use the first (.225) address.
If I reconfigure my firewall to start at .226 and continue up to .238 I only can use the .226.
I have tried this with multiple firewalls, both Watchguard and Juniper.
The ISP is dumb. Does anyone know why I can only use the first IP in the range?
EDIT: When I first switched to this ISP I had the same problem. It took them 2 weeks to figure out what was wrong. The eventually made it work, but they didn't tell me what they did, and they didn't document it. Now the problem is back and they don't know how to fix it.