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Port 6703 (e-design-web)

IANA assigns port 6703 to e-design-web: e-Design web.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
e-design-web TCP e-Design web Janos Lerch -
e-design-web UDP e-Design web Janos Lerch -

Registry dates for this port: registered 2006-02.

Check what is listening on port 6703

Linux: is anything listening on TCP 6703?
sudo ss -tlnp 'sport = :6703'
Linux: UDP 6703
sudo ss -ulnp 'sport = :6703'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6703
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6703 '
Windows (Command Prompt)
netstat -ano | findstr :6703
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6703 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6703
From Windows
Test-NetConnection HOST -Port 6703
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6703

Block port 6703 in the firewall

ufw
sudo ufw deny 6703/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6703 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6703 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6703' -Direction Inbound -Protocol TCP -LocalPort 6703 -Action Block
ufw
sudo ufw deny 6703/udp
iptables
sudo iptables -A INPUT -p udp --dport 6703 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6703 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6703' -Direction Inbound -Protocol UDP -LocalPort 6703 -Action Block

Related ports

6701kti-icad-srvr6702e-design-net6704frc-hp6705frc-mp

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