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Port 3507 (nesh-broker)

IANA assigns port 3507 to nesh-broker: Nesh Broker Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
nesh-broker TCP Nesh Broker Port Jeremy Maiden -
nesh-broker UDP Nesh Broker Port Jeremy Maiden -

Check what is listening on port 3507

Linux: is anything listening on TCP 3507?
sudo ss -tlnp 'sport = :3507'
Linux: UDP 3507
sudo ss -ulnp 'sport = :3507'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3507
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3507 '
Windows (Command Prompt)
netstat -ano | findstr :3507
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3507 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3507
From Windows
Test-NetConnection HOST -Port 3507
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3507

Block port 3507 in the firewall

ufw
sudo ufw deny 3507/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3507 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3507 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3507' -Direction Inbound -Protocol TCP -LocalPort 3507 -Action Block
ufw
sudo ufw deny 3507/udp
iptables
sudo iptables -A INPUT -p udp --dport 3507 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3507 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3507' -Direction Inbound -Protocol UDP -LocalPort 3507 -Action Block

Related ports

3505ccmcomm3506apc-35063508interactionweb3509vt-ssl

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