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Port 2278 (s3db)

IANA assigns port 2278 to s3db: Simple Stacked Sequences Database.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
s3db TCP Simple Stacked Sequences Database David Brandon -
s3db UDP Simple Stacked Sequences Database David Brandon -

Registry dates for this port: registered 2006-08.

Check what is listening on port 2278

Linux: is anything listening on TCP 2278?
sudo ss -tlnp 'sport = :2278'
Linux: UDP 2278
sudo ss -ulnp 'sport = :2278'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2278
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2278 '
Windows (Command Prompt)
netstat -ano | findstr :2278
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2278 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2278
From Windows
Test-NetConnection HOST -Port 2278
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2278

Block port 2278 in the firewall

ufw
sudo ufw deny 2278/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2278 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2278 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2278' -Direction Inbound -Protocol TCP -LocalPort 2278 -Action Block
ufw
sudo ufw deny 2278/udp
iptables
sudo iptables -A INPUT -p udp --dport 2278 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2278 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2278' -Direction Inbound -Protocol UDP -LocalPort 2278 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.