Rsyslog logs display short hostname instead of FQDN, causing hostname conflicts in Centralized log server.

Issue

• Syslog is sending logs based on the short hostname, causing conflicts when multiple servers have the same short name.
• For instance, servers with hostnames server.example.com and server.lab.example.com both send logs under the short name server.
• This behavior causes confusion when reviewing logs in a SIEM system, especially when multiple servers share the same short hostname.
• It's difficult to differentiate between logs from different servers in a centralized logging environment.