Ok this is driving me crazy and no logs are helping. Main server is Rocky Linux 10.1 SYSTEM INFORMATION OS type and version Rocky Linux 10.1 Webmin version 2.621 Usermin version 2.521 Virtualmin version 8.0.1 Professional Theme version 26.22 Apache version 2.4.63 Package upda…

I had this and I think it was a firewall problem. I have a small, inexpensive AWS instance for it. The AWS firewall needed a wider port range. I think 10000 to 10100 is the recommended range now.

@ID10T thanks for the reply yes ports are open was working before I upgraded to Rocky Linux 10.1 and VM 8 on main server :frowning:

@ID10T Docs say to check yes for fast rpc calls but that option is not there for now in Rocky Linux 10.1 It was I remember for rocky linux 9.7 Lol every few years it is a struggle with new OS’s changing things

[image] CTS: Can't use string ("Failed to connect to fastrpc.cgi"...) as a HASH ref while "strict refs" in use at /usr/libexec/webmin/bind8/slave_add.cgi line 101 @Jamie , can you take a look?

[image] CTS: Docs say to check yes for fast rpc calls but that option is not there for now in Rocky Linux 10.1 We have removed it! FastRPC should be the default option now. The lesser options the better.

[image] Ilia: @Jamie , can you take a look? Thanks, I see the cause of this confusing error, and will fix it in the next release.

Just increase the port range (10000+) on your firewall and you will be golden. I added additional 500 ports and it worked immediately… not to mention I spent few hours troubleshooting the error :frowning:

How to Configure Secondary DNS

Webmin

ID10T February 6, 2026, 8:05pm 4

Hmm… I think there was another thread about default hashes configured in Rocky 10. I guess I just saw the first part and it triggered what I remembered.