Hey.
When it generates the dns serial number it seems to make yy/mm/random? but it seems mxtoolbox f.ex have issues with this when it expects yyyy/mm/random
and it gives the error: karsyn.ns.cloudflare.com reported Serial 2302637494 : Serial year was 2302 which is in the future.
who is managing the dns ?
what OS are you using ?
what version of webmin are you using ?
if installed, what version of virtualmin are you using ?
are all packages up to date ?
it is impossible to help without the above information
You can choose whatever format you want in Webmin’s BIND module.
But, that’s a bug that they’re treating serial number like a date. mxtoolbox is wrong. Any number is valid for a serial number as long as it increases each time there is a change. I would ignore it.
I mean, if you like it to be a date, you can certainly make it a date, but it’s nobody’s business but yours what serial number format you use.