Port 1416 is the registered port for Novell LU6.2, a protocol that bridged two different computing worlds in the 1980s and 90s: Novell's NetWare local area networks and IBM's Systems Network Architecture (SNA).
If you're seeing traffic on this port today, you've found either a legacy system that's been running longer than most engineers have been alive, or something else has claimed this number.
What LU6.2 Actually Was
LU6.2 stands for Logical Unit 6.2, part of IBM's SNA protocol suite introduced in 1982.1 It provided APPC (Advanced Program-to-Program Communication)—a way for applications on different computers to talk to each other, especially between PCs and IBM mainframes.2
Novell implemented LU6.2 support through their NetWare for SAA (Systems Application Architecture) product. This allowed a NetWare server to function as a gateway between an SNA network and a NetWare LAN.3 Port 1416 was the door this gateway listened on.
The protocol enabled distributed processing in an era when most computing was centralized. PCs could finally have conversations with mainframes as peers, not just terminals.4
The Problem It Solved
In the late 1980s, enterprises ran IBM mainframes for critical systems but were adopting NetWare LANs for departmental computing. These networks didn't speak the same language. SNA was IBM's proprietary architecture. NetWare used IPX/SPX and later TCP/IP.
LU6.2 was the translator. It let applications on NetWare networks communicate with applications on SNA networks. A PC running on a NetWare LAN could participate in distributed transactions with a mainframe application—something that was genuinely difficult before this protocol existed.
By 1987, 18% of large US companies had implemented LU 6.2 systems, and 51% expected to have them running within two years.5 This was significant adoption for enterprise infrastructure.
Why You Don't See It Anymore
NetWare itself is nearly extinct. SNA networks have largely been replaced by TCP/IP. The bridges between them are no longer necessary because one side of the bridge no longer exists.
Most modern networks will never see traffic on port 1416. If you do, you're either working with a carefully preserved legacy system, or investigating why something unexpected is using this number.
Checking What's Listening
If you need to see what's actually using port 1416 on your system:
Linux/Mac:
Windows:
The process ID will tell you what's actually there. If it's not a genuine Novell NetWare service (and it almost certainly isn't), you've found something else.
Port Classification
Port 1416 falls in the registered ports range (1024-49151). These ports are registered with IANA for specific services but don't have the reserved status of well-known ports (0-1023). Any application can technically listen here, but officially, this number belongs to Novell LU6.2.6
Security Considerations
Since this protocol is essentially obsolete, any traffic on port 1416 deserves scrutiny. Legacy protocols that are no longer maintained can have unpatched vulnerabilities. Some sources have flagged port 1416 as having been used by malware in the past, though this is true for many ports—trojans often squat on registered ports that legitimate services no longer use.7
If you're not running a deliberate legacy SNA gateway, port 1416 should be quiet.
The Broader Context
Port 1416 represents a specific moment in computing history: the transition from centralized mainframe computing to distributed networks. LU6.2 was one of the protocols that made that transition possible, letting new architectures interoperate with old ones rather than requiring a sudden cutover.
The fact that this port still has its official assignment decades after the protocol's practical obsolescence is a reminder that the port registry is a historical record as much as a technical directory. These numbers remember what the Internet used to carry.
Frequently Asked Questions About Port 1416
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