Port 445 — SMB
Server Message Block — Windows file sharing over modern networks.
| Port number | 445 |
|---|---|
| Service | SMB |
| Transport | TCP |
| Category | File Transfer |
Is port 445 safe?
Exploited by WannaCry/EternalBlue; never expose to the internet.
Frequently asked questions
What is port 445 used for?
Port 445 (TCP) is the standard port for SMB. Server Message Block — Windows file sharing over modern networks.
Is port 445 safe to open?
Exploited by WannaCry/EternalBlue; never expose to the internet.
Is port 445 TCP or UDP?
Port 445 commonly uses TCP.