Email and SSH failing on one of my two networks but not the other

1

I suddenly can’t check email nor SSH into one of my two MIAB servers from my business network (at my home) but I can check from my residential network. I can still check the other MIAB server from my business network.
So that would seem to indicate the issue is on the MIAB server I can’t reach; correct?
Suggestions of where to look for a root cause?

Thanks,
Keith.

2

Check fail2ban on the miab box, perhaps your business network is blocked. Could also be a firewall or router issue on your business network.

2 Likes
3

Totally willing for it to be a problem with my firewall at home but what could it be? I use pfSense. I can do everything else I have always been able to do through said firewall. This just seems like a weird thing to suddenly happen.

4

No files updated in fail2ban directory this year. I don’t see any files updated in any of the sub-directories either.

5

From the firewall I can ping with the IPv6 address but not IPv4. From my computer, I can’t ping either.
And now it doesn’t work from either.

6

sudo fail2ban-client unban <myIPaddress(es)>
yields the same response of “0”; which I assume means that none of the lists had those IP addresses listed.

7

I decided to go drastic and just delete the fail2ban database.
It worked.
Thanks for the lead @KiekerJan I also added my home IP address block to the jail.conf file to be ignored.