HTTPfy

Port 3263 (ecolor-imager)

IANA assigns port 3263 to ecolor-imager: E-Color Enterprise Imager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ecolor-imager TCP E-Color Enterprise Imager Tamara Baker -
ecolor-imager UDP E-Color Enterprise Imager Tamara Baker -

Check what is listening on port 3263

Linux: is anything listening on TCP 3263?
sudo ss -tlnp 'sport = :3263'
Linux: UDP 3263
sudo ss -ulnp 'sport = :3263'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3263
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3263 '
Windows (Command Prompt)
netstat -ano | findstr :3263
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3263 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3263
From Windows
Test-NetConnection HOST -Port 3263
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3263

Block port 3263 in the firewall

ufw
sudo ufw deny 3263/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3263 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3263 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3263' -Direction Inbound -Protocol TCP -LocalPort 3263 -Action Block
ufw
sudo ufw deny 3263/udp
iptables
sudo iptables -A INPUT -p udp --dport 3263 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3263 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3263' -Direction Inbound -Protocol UDP -LocalPort 3263 -Action Block

Related ports

3261winshadow3262necp3264ccmail3265altav-tunnel

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