Port 3455RSVP Protocol
The Resource ReSerVation Protocol (RSVP) enables network devices to reserve resources across an IP network, supporting applications that require guaranteed or differentiated levels of service such as latency-sensitive audio and video streams..
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 8,157
2 transports registered
payload readable on path
registered with iana
caution
rank 618 of 993 · top 62%
Technical Details
what runs on :3455The Resource ReSerVation Protocol (RSVP) operates as a signaling protocol designed to reserve resources across a network by establishing a specific Quality of Service (QoS) for data flows. RSVP runs over both TCP and UDP, using port 3455 to communicate reservation requests between network endpoints and intermediate routers.
RSVP functions by sending PATH messages downstream from the source to the receiver, which then responds with RESV messages that travel upstream, detailing bandwidth and service parameters required. Nodes in the network process these messages, allocate necessary resources like buffer space or bandwidth, and maintain soft state entries refreshed periodically.
RSVP is integral to frameworks such as Integrated Services (IntServ), where it provides fine-grained bandwidth guarantees. It helps manage the performance of real-time interactive services like VoIP or video conferencing by facilitating reliable resource allocation across IP networks prone to congestion and variable latency.
Security Information
exposure of :3455risk 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:
- Susceptibility to Denial of Service (DoS) attacks by flooding the network with excessive reservation requests, which can exhaust router resources.
- Manipulation or spoofing of RSVP packets can lead to unauthorized resource reservations or degradation of service.
- Amplification attacks where RSVP messages trigger excessive control traffic.
Common Mitigations:
- Implement robust authentication mechanisms such as RSVP Integrity Object to validate message origins.
- Utilize network-layer access control lists (ACLs) to limit RSVP communication to trusted hosts.
- Employ rate limiting on RSVP signaling traffic to prevent resource exhaustion.
- Monitor and log RSVP activities to detect anomalies and abuse promptly.
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risk mix of the 8 listed
- caution100%
0 of 8 encrypted