Port 1761CFT 0
**Port 1761 (cft-0)** is officially assigned for **Cisco's Flexible Table 0 (cft-0)**, a protocol commonly utilized in Cisco networking equipment. It primarily facilitates communication associated with Cisco's proprietary protocols and device management, typically over UDP. While not widespread outside Cisco environments, understanding its role is important for network administrators managing Cisco infrastructure..
- transport
- udp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 4,983
single transport
payload readable on path
registered with iana
caution
rank 924 of 993 · top 93%
1 other service is registered on port 1761. compare all 2 →
Technical Details
what runs on :1761Overview:
Cisco Flexible Table (cft-0) uses UDP port 1761 for internal communication between Cisco devices and within certain proprietary protocol operations. Its main function involves table updates, control messaging, and data synchronization inside Cisco's network ecosystem.
Protocol Details:
- Operates primarily over UDP, which allows for lightweight and low-latency messaging.
- Involves Cisco’s internal services related to configuration and table management.
- Usually not meant for direct end-user interaction, but critical in device communication and configuration propagation.
Deployment Context:
Typically deployed within tightly controlled Cisco network environments, like large enterprise infrastructures, ISPs, or data centers using Cisco core devices, where automated device control or configuration management occur.
Security Information
exposure of :1761risk 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
udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common Vulnerabilities:
- Unauthorized access can occur if port 1761 is exposed externally, potentially leading to manipulation of Cisco device configurations.
- Denial of Service (DoS) attacks exploiting the open UDP port may disrupt Cisco device communication.
- Packet spoofing could allow attackers to inject malicious control data.
Mitigations:
- Restrict access to management networks, ensuring port 1761 communication only occurs within trusted device segments.
- Use access control lists (ACLs) and firewalls to block external or untrusted access.
- Regularly update Cisco device firmware to mitigate any known vulnerabilities.
- Enable network monitoring to detect unusual UDP traffic on port 1761.
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