HTTPfy

Port 1655 (dec-mbadmin)

IANA assigns port 1655 to dec-mbadmin.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dec-mbadmin TCP dec-mbadmin - -
dec-mbadmin UDP dec-mbadmin - -

Check what is listening on port 1655

Linux: is anything listening on TCP 1655?
sudo ss -tlnp 'sport = :1655'
Linux: UDP 1655
sudo ss -ulnp 'sport = :1655'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1655
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1655 '
Windows (Command Prompt)
netstat -ano | findstr :1655
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1655 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1655
From Windows
Test-NetConnection HOST -Port 1655
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1655

Block port 1655 in the firewall

ufw
sudo ufw deny 1655/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1655 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1655 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1655' -Direction Inbound -Protocol TCP -LocalPort 1655 -Action Block
ufw
sudo ufw deny 1655/udp
iptables
sudo iptables -A INPUT -p udp --dport 1655 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1655 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1655' -Direction Inbound -Protocol UDP -LocalPort 1655 -Action Block

Related ports

1653alphatech-lm1654stargatealerts1656dec-mbadmin-h1657fujitsu-mmpdc

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