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Port 495 (intecourier)

IANA assigns port 495 to intecourier.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
intecourier TCP intecourier Steve Favor -
intecourier UDP intecourier Steve Favor -

Check what is listening on port 495

Linux: is anything listening on TCP 495?
sudo ss -tlnp 'sport = :495'
Linux: UDP 495
sudo ss -ulnp 'sport = :495'
Linux / macOS: which process owns the port
sudo lsof -nP -i :495
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':495 '
Windows (Command Prompt)
netstat -ano | findstr :495
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 495 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 495
From Windows
Test-NetConnection HOST -Port 495
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 495

Block port 495 in the firewall

ufw
sudo ufw deny 495/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 495 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 495 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 495' -Direction Inbound -Protocol TCP -LocalPort 495 -Action Block
ufw
sudo ufw deny 495/udp
iptables
sudo iptables -A INPUT -p udp --dport 495 -j DROP
nftables
sudo nft add rule inet filter input udp dport 495 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 495' -Direction Inbound -Protocol UDP -LocalPort 495 -Action Block

Related ports

493ticf-2494pov-ray496pim-rp-disc497retrospect

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