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Port 1507 (symplex)

IANA assigns port 1507 to symplex.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
symplex TCP symplex Mike Turley -
symplex UDP symplex Mike Turley -

Check what is listening on port 1507

Linux: is anything listening on TCP 1507?
sudo ss -tlnp 'sport = :1507'
Linux: UDP 1507
sudo ss -ulnp 'sport = :1507'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1507
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1507 '
Windows (Command Prompt)
netstat -ano | findstr :1507
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1507 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1507
From Windows
Test-NetConnection HOST -Port 1507
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1507

Block port 1507 in the firewall

ufw
sudo ufw deny 1507/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1507 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1507 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1507' -Direction Inbound -Protocol TCP -LocalPort 1507 -Action Block
ufw
sudo ufw deny 1507/udp
iptables
sudo iptables -A INPUT -p udp --dport 1507 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1507 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1507' -Direction Inbound -Protocol UDP -LocalPort 1507 -Action Block

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