Port 41Graphics Protocol
Port 41 is officially registered for the Graphics protocol, intended for experimental or legacy graphics or imaging data transmission. However, it is rarely used in modern networks, and its initial scope of enabling graphics exchange across networked devices is largely obsolete. Today, it often appears in port lists for legacy reasons rather than active service deployment..
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 8,122
2 transports registered
payload readable on path
registered with iana
caution
rank 626 of 993 · top 63%
Technical Details
what runs on :41Port 41 is allocated by IANA for the Graphics protocol, initially designed to support experimental graphics or image data communication. Such protocols aimed to facilitate device-independent graphic information exchange in a structured and potentially real-time manner. Though exact protocol specifications are limited, the intention was to standardize graphics data transmission using this port.
Given the rapid evolution of graphical standards, port 41 never saw widespread adoption. Modern graphics protocols shifted toward application-layer standards such as HTTP(S), RTP, and specialized streaming protocols that offer better compression, security, and compatibility. As a result, the original usage for port 41 is largely historical.
Today, traffic on port 41 is uncommon; it is largely observed through residual scans or legacy applications. While technically present in the official port listings, active deployment of the underlying graphics protocol is practically nonexistent in commercial and enterprise environments.
Security Information
exposure of :41risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
network services averages 3.9 across 604 ports — this one sits 0.1 above.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
tcp · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common vulnerabilities related to port 41 stem primarily from its general open state on firewalls rather than exploitation of a specific protocol. Attackers may utilize unused or poorly monitored ports like 41 for covert channeling, port hopping, or reconnaissance. An open or misconfigured port might also be misused to tunnel malicious traffic or bypass security controls.
Mitigations primarily involve standard network hardening techniques:
- Close or restrict inbound and outbound access to unused ports like 41.
- Implement strict firewall policies restricting port 41 unless specifically needed.
- Monitor network scans and unusual traffic targeting high-numbered low-usage ports.
- Use intrusion detection systems (IDS) to flag unexpected traffic on this port. Because no modern applications require port 41, proactively disabling it reduces attack surfaces without operational impact.
Related Ports
the 8 most looked-up other ports in network services — 604 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :9080 | Groove RPC | TCPUDP | Web Services | caution | 70.8k |
| :6543 | Jetnet | UDP | Network Services | caution | 65.3k |
| :5938 | TeamViewer | TCPUDP | Remote Access | caution | 65.0k |
| :8291 | Winbox MikroTik Admin | TCP | Security | caution | 62.9k |
| :3233 | WhiskerControl Protocol | TCPUDP | Network Services | caution | 61.9k |
| :3268 | Microsoft Global Catalog (GC) | TCPUDP | Security | caution | 54.6k |
| :135 | Microsoft EPMAP | TCPUDP | Security | caution | 51.9k |
| :3128 | Tatsoft Default HTTP Proxy | TCP | Web Services | caution | 46.8k |
risk mix of the 8 listed
- caution100%
0 of 8 encrypted