Internet-Security.com UDP port 32803 details

Linux/Unix NFSv3 file locking (the NFS Lock Manager: nlockmgr/lockd) is often configured to use UDP port 32803 for lockd traffic between NFS clients and servers.
Real-world: RHEL/CentOS/Oracle Linux and SUSE/Ubuntu expose settings like LOCKD_UDPPORT or nlm_udpport, and many production deployments pin these to 32803 to simplify firewalling; vendor and admin guides frequently list UDP/32803 among required NFS ports.
Example: Enterprise NFS servers on RHEL/CentOS with lockd fixed ports (e.g., LOCKD_UDPPORT=32803, LOCKD_TCPPORT=32803) use UDP 32803 for NFS lock traffic to Linux clients.

UDP 32803