Disable SSH Auto-Logout

Centmin Mod configures SSH for 3600 seconds timeout or 1hr.

Code (Text):

grep ^ClientAliveInterval /etc/ssh/sshd_config
ClientAliveInterval 3600

But your SSH client can help i.e. with SecureCRT I can configure it to send a NO-OP protocol every 60 seconds.

When the "Send NO-OP protocol" option is enabled in SecureCRT:

1. Regular Intervals: SecureCRT sends a NO-OP message at regular intervals to the server.
2. No Actual Data: These messages do not carry any actual data or perform any operation other than keeping the connection open.
3. Server Response: The server acknowledges the NO-OP message, thereby resetting the idle timer on both the client and server sides.

What SSH client software you using? Check if it has such a NO-OP protocol feature

You can also whitelist your IP in CSF Firewall CSF Firewall - CentminMod.com LEMP Nginx web stack for CentOS, AlmaLinux, Rocky Linux

 

CSF Firewall - CentminMod.com LEMP Nginx web stack for CentOS, AlmaLinux, Rocky Linux has info on whitelisting dynamic IP addresses too.

Putty has equivalent NO-OP setting for sending null packets IRC

 

I don't use this but google search https://stackoverflow.com/a/63573700

As to re-entering passwords, you can setup SSH public keys Visual Studio Code Remote Development Troubleshooting Tips and Tricks