HTTPfy

Port 1755 (ms-streaming)

IANA assigns port 1755 to ms-streaming.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ms-streaming TCP ms-streaming Bret O Rourke -
ms-streaming UDP ms-streaming Bret O Rourke -

Check what is listening on port 1755

Linux: is anything listening on TCP 1755?
sudo ss -tlnp 'sport = :1755'
Linux: UDP 1755
sudo ss -ulnp 'sport = :1755'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1755
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1755 '
Windows (Command Prompt)
netstat -ano | findstr :1755
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1755 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1755
From Windows
Test-NetConnection HOST -Port 1755
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1755

Block port 1755 in the firewall

ufw
sudo ufw deny 1755/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1755 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1755 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1755' -Direction Inbound -Protocol TCP -LocalPort 1755 -Action Block
ufw
sudo ufw deny 1755/udp
iptables
sudo iptables -A INPUT -p udp --dport 1755 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1755 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1755' -Direction Inbound -Protocol UDP -LocalPort 1755 -Action Block

Related ports

1753predatar-comms1754oracle-em21756capfast-lmd1757cnhrp

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.