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Port 3707 (rt-event-s)

IANA assigns port 3707 to rt-event-s: Real-Time Event Secure Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rt-event-s TCP Real-Time Event Secure Port Terry Gin -
rt-event-s UDP Real-Time Event Secure Port Terry Gin -

Registry dates for this port: registered 2003-02.

Check what is listening on port 3707

Linux: is anything listening on TCP 3707?
sudo ss -tlnp 'sport = :3707'
Linux: UDP 3707
sudo ss -ulnp 'sport = :3707'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3707
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3707 '
Windows (Command Prompt)
netstat -ano | findstr :3707
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3707 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3707
From Windows
Test-NetConnection HOST -Port 3707
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3707

Block port 3707 in the firewall

ufw
sudo ufw deny 3707/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3707 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3707 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3707' -Direction Inbound -Protocol TCP -LocalPort 3707 -Action Block
ufw
sudo ufw deny 3707/udp
iptables
sudo iptables -A INPUT -p udp --dport 3707 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3707 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3707' -Direction Inbound -Protocol UDP -LocalPort 3707 -Action Block

Related ports

3705adobeserver-53706rt-event3708sun-as-iiops3709ca-idms

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