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Port 700 (epp)

IANA assigns port 700 to epp: Extensible Provisioning Protocol.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
epp TCP Extensible Provisioning Protocol - RFC 5734
epp UDP EPP running over QUIC IESG RFC 5734, RFC-ietf-regext-epp-quic-12

Registry dates for this port: last modified 2026-07-23.

Check what is listening on port 700

Linux: is anything listening on TCP 700?
sudo ss -tlnp 'sport = :700'
Linux: UDP 700
sudo ss -ulnp 'sport = :700'
Linux / macOS: which process owns the port
sudo lsof -nP -i :700
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':700 '
Windows (Command Prompt)
netstat -ano | findstr :700
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 700 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 700
From Windows
Test-NetConnection HOST -Port 700
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 700

Block port 700 in the firewall

ufw
sudo ufw deny 700/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 700 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 700 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 700' -Direction Inbound -Protocol TCP -LocalPort 700 -Action Block
ufw
sudo ufw deny 700/udp
iptables
sudo iptables -A INPUT -p udp --dport 700 -j DROP
nftables
sudo nft add rule inet filter input udp dport 700 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 700' -Direction Inbound -Protocol UDP -LocalPort 700 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.