HTTPfy

Port 3508 (interactionweb)

IANA assigns port 3508 to interactionweb: Interaction Web.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
interactionweb TCP Interaction Web Mike Gagle 2 -
interactionweb UDP Interaction Web Mike Gagle 2 -

Check what is listening on port 3508

Linux: is anything listening on TCP 3508?
sudo ss -tlnp 'sport = :3508'
Linux: UDP 3508
sudo ss -ulnp 'sport = :3508'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3508
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3508 '
Windows (Command Prompt)
netstat -ano | findstr :3508
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3508 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3508
From Windows
Test-NetConnection HOST -Port 3508
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3508

Block port 3508 in the firewall

ufw
sudo ufw deny 3508/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3508 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3508 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3508' -Direction Inbound -Protocol TCP -LocalPort 3508 -Action Block
ufw
sudo ufw deny 3508/udp
iptables
sudo iptables -A INPUT -p udp --dport 3508 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3508 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3508' -Direction Inbound -Protocol UDP -LocalPort 3508 -Action Block

Related ports

3506apc-35063507nesh-broker3509vt-ssl3510xss-port

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