- Answer only the networks that need the service (no open resolvers, relays or reflectors).
- UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
- Disable legacy test services that have no use in production.
Port 915: Routing in Fat Trees Topology Information Element
Port 915 is assigned by IANA to rift-ties (Routing in Fat Trees Topology Information Element).
915
How rift-ties works
Network servicesThe client sends a request to port 915 and the rift-ties service answers.
- Transport
- UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Well-known (0-1023)
- Category
- Network services
Is port 915 dangerous?
We have no specific security note for port 915. Its risk depends on the program actually listening on it. General advice for network services services:
IANA registry entries for port 915
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| rift-ties | 915 | UDP | Routing in Fat Trees Topology Information Element | RFC 9692 | 2024-06-07 |
| - | 915 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 915, and is it reachable?
Linux
sudo ss -ltnup 'sport = :915' # process listening on 915
sudo lsof -nP -i :915macOS
sudo lsof -nP -i :915
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 915 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 915 netstat -ano | findstr :915
From another machine
nmap -p 915 -sV <host> sudo nmap -sU -p 915 <host> nc -zv <host> 915
Block it in the firewall
sudo ufw deny 915/udp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 915" -Direction Inbound -LocalPort 915 -Protocol UDP -Action Block # Windows
What is port 915 used for?
Port 915 is assigned by IANA to rift-ties (Routing in Fat Trees Topology Information Element).
Is port 915 TCP or UDP?
Port 915 is registered for UDP.
Is it safe to open port 915?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Answer only the networks that need the service (no open resolvers, relays or reflectors).
How do I check if port 915 is open?
On Linux run "ss -ltnup 'sport = :915'", on macOS "lsof -nP -i :915", and on Windows "netstat -ano | findstr :915" to see the local process. From another machine, "nmap -p 915 <host>" shows whether it is reachable.
Other network services ports
:53 DNS tcp · udp · moderate risk :135 MS RPC tcp · udp · high risk :123 NTP udp · tcp · moderate risk :67 DHCP server udp · tcp · moderate risk :111 rpcbind tcp · udp · high risk :9100 Raw printing (JetDirect) tcp · udp · high risk :631 IPP / CUPS tcp · udp · high risk :5353 mDNS udp · tcp · moderate risk