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Port 3505 (ccmcomm)

IANA assigns port 3505 to ccmcomm: CCM communications port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ccmcomm TCP CCM communications port Tom Bougan -
ccmcomm UDP CCM communications port Tom Bougan -

Check what is listening on port 3505

Linux: is anything listening on TCP 3505?
sudo ss -tlnp 'sport = :3505'
Linux: UDP 3505
sudo ss -ulnp 'sport = :3505'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3505
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3505 '
Windows (Command Prompt)
netstat -ano | findstr :3505
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3505 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3505
From Windows
Test-NetConnection HOST -Port 3505
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3505

Block port 3505 in the firewall

ufw
sudo ufw deny 3505/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3505 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3505 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3505' -Direction Inbound -Protocol TCP -LocalPort 3505 -Action Block
ufw
sudo ufw deny 3505/udp
iptables
sudo iptables -A INPUT -p udp --dport 3505 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3505 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3505' -Direction Inbound -Protocol UDP -LocalPort 3505 -Action Block

Related ports

3503lsp-ping3504ironstorm3506apc-35063507nesh-broker

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