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Port 6788 (smc-http)

IANA assigns port 6788 to smc-http: SMC-HTTP.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
smc-http TCP SMC-HTTP Ratnadeep Bhattachar -
smc-http UDP SMC-HTTP Ratnadeep Bhattachar -

Registry dates for this port: registered 2002-11.

Check what is listening on port 6788

Linux: is anything listening on TCP 6788?
sudo ss -tlnp 'sport = :6788'
Linux: UDP 6788
sudo ss -ulnp 'sport = :6788'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6788
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6788 '
Windows (Command Prompt)
netstat -ano | findstr :6788
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6788 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6788
From Windows
Test-NetConnection HOST -Port 6788
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6788

Block port 6788 in the firewall

ufw
sudo ufw deny 6788/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6788 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6788 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6788' -Direction Inbound -Protocol TCP -LocalPort 6788 -Action Block
ufw
sudo ufw deny 6788/udp
iptables
sudo iptables -A INPUT -p udp --dport 6788 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6788 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6788' -Direction Inbound -Protocol UDP -LocalPort 6788 -Action Block

Related ports

6786smc-jmx6787smc-admin6789radg6790hnmp

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