- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Port 5445: Server Message Block over Remote Direct Memory Access
Port 5445 is assigned by IANA to smbdirect (Server Message Block over Remote Direct Memory Access).
5445
How smbdirect works
Other servicesThe client sends a request to port 5445 and the smbdirect service answers.
- Transport
- TCP · SCTP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- Other services
Is port 5445 dangerous?
We have no specific security note for port 5445. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 5445
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| smbdirect | 5445 | TCP, SCTP | Server Message Block over Remote Direct Memory Access | - | 2012-03-15 |
| - | 5445 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 5445, and is it reachable?
Linux
sudo ss -ltnup 'sport = :5445' # process listening on 5445
sudo lsof -nP -i :5445macOS
sudo lsof -nP -i :5445
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5445 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 5445 netstat -ano | findstr :5445
From another machine
nmap -p 5445 -sV <host> nc -zv <host> 5445
Block it in the firewall
sudo ufw deny 5445/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 5445" -Direction Inbound -LocalPort 5445 -Protocol TCP -Action Block # Windows
What is port 5445 used for?
Port 5445 is assigned by IANA to smbdirect (Server Message Block over Remote Direct Memory Access).
Is port 5445 TCP or UDP?
Port 5445 is registered for TCP and SCTP.
Is it safe to open port 5445?
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. Close the port if nothing on the host needs it.
How do I check if port 5445 is open?
On Linux run "ss -ltnup 'sport = :5445'", on macOS "lsof -nP -i :5445", and on Windows "netstat -ano | findstr :5445" to see the local process. From another machine, "nmap -p 5445 <host>" shows whether it is reachable.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp