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Port 286 (fxp)

IANA assigns port 286 to fxp: FXP Communication.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
fxp TCP FXP Communication James Darnall -
fxp UDP FXP Communication James Darnall -

Check what is listening on port 286

Linux: is anything listening on TCP 286?
sudo ss -tlnp 'sport = :286'
Linux: UDP 286
sudo ss -ulnp 'sport = :286'
Linux / macOS: which process owns the port
sudo lsof -nP -i :286
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':286 '
Windows (Command Prompt)
netstat -ano | findstr :286
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 286 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 286
From Windows
Test-NetConnection HOST -Port 286
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 286

Block port 286 in the firewall

ufw
sudo ufw deny 286/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 286 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 286 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 286' -Direction Inbound -Protocol TCP -LocalPort 286 -Action Block
ufw
sudo ufw deny 286/udp
iptables
sudo iptables -A INPUT -p udp --dport 286 -j DROP
nftables
sudo nft add rule inet filter input udp dport 286 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 286' -Direction Inbound -Protocol UDP -LocalPort 286 -Action Block

Related ports

2849fxp283rescap284corerjd287k-block300tacacss

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