HTTPfy

Port 207 (at-7)

IANA assigns port 207 to at-7: AppleTalk Unused.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
at-7 TCP AppleTalk Unused - -
at-7 UDP AppleTalk Unused - -

Check what is listening on port 207

Linux: is anything listening on TCP 207?
sudo ss -tlnp 'sport = :207'
Linux: UDP 207
sudo ss -ulnp 'sport = :207'
Linux / macOS: which process owns the port
sudo lsof -nP -i :207
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':207 '
Windows (Command Prompt)
netstat -ano | findstr :207
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 207 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 207
From Windows
Test-NetConnection HOST -Port 207
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 207

Block port 207 in the firewall

ufw
sudo ufw deny 207/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 207 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 207 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 207' -Direction Inbound -Protocol TCP -LocalPort 207 -Action Block
ufw
sudo ufw deny 207/udp
iptables
sudo iptables -A INPUT -p udp --dport 207 -j DROP
nftables
sudo nft add rule inet filter input udp dport 207 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 207' -Direction Inbound -Protocol UDP -LocalPort 207 -Action Block

Related ports

205at-5206at-zis208at-8209qmtp

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