TCP Port 20256

About TCP Port 20256

Port 20256 has no formal IANA registration. Ports in this numerical range can be assigned by IANA but this specific port has no current registration. It is referenced in 50 IDS rules but does not exhibit malware activity indicators in our data.

IDS Rule References

50 IDS / security rules reference TCP port 20256. Treat that number as context, not a danger score. Many detection rules are written against groups of ports rather than one service, web ports especially, so common web alternate ports inherit large counts while genuinely sensitive services can show few rules or none. Presence in IDS rules does not mean traffic on this port is malicious.

Rule categories (top 2): attempted-recon (46), attempted-dos (4).

Sample rule descriptions for TCP port 20256:

• PROTOCOL-SCADA PCOM Identification ASCII request
• PROTOCOL-SCADA PCOM Init Device ASCII request
• PROTOCOL-SCADA PCOM Set UnitID ASCII request
• PROTOCOL-SCADA PCOM Get UnitID ASCII request
• PROTOCOL-SCADA PCOM Read Inputs ASCII request

Data Sources

This information is compiled from: Snort Community Rules (GPLv2).