HTTPfy

Port 702 (iris-beep)

IANA assigns port 702 to iris-beep: IRIS over BEEP.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
iris-beep TCP IRIS over BEEP - RFC 3983
iris-beep UDP IRIS over BEEP - RFC 3983

Check what is listening on port 702

Linux: is anything listening on TCP 702?
sudo ss -tlnp 'sport = :702'
Linux: UDP 702
sudo ss -ulnp 'sport = :702'
Linux / macOS: which process owns the port
sudo lsof -nP -i :702
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':702 '
Windows (Command Prompt)
netstat -ano | findstr :702
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 702 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 702
From Windows
Test-NetConnection HOST -Port 702
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 702

Block port 702 in the firewall

ufw
sudo ufw deny 702/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 702 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 702 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 702' -Direction Inbound -Protocol TCP -LocalPort 702 -Action Block
ufw
sudo ufw deny 702/udp
iptables
sudo iptables -A INPUT -p udp --dport 702 -j DROP
nftables
sudo nft add rule inet filter input udp dport 702 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 702' -Direction Inbound -Protocol UDP -LocalPort 702 -Action Block

Related ports

700epp701lmp704elcsd705agentx

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