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Port 2861 (dialpad-voice2)

IANA assigns port 2861 to dialpad-voice2: Dialpad Voice 2.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dialpad-voice2 TCP Dialpad Voice 2 Wongyu Cho -
dialpad-voice2 UDP Dialpad Voice 2 Wongyu Cho -

Check what is listening on port 2861

Linux: is anything listening on TCP 2861?
sudo ss -tlnp 'sport = :2861'
Linux: UDP 2861
sudo ss -ulnp 'sport = :2861'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2861
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2861 '
Windows (Command Prompt)
netstat -ano | findstr :2861
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2861 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2861
From Windows
Test-NetConnection HOST -Port 2861
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2861

Block port 2861 in the firewall

ufw
sudo ufw deny 2861/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2861 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2861 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2861' -Direction Inbound -Protocol TCP -LocalPort 2861 -Action Block
ufw
sudo ufw deny 2861/udp
iptables
sudo iptables -A INPUT -p udp --dport 2861 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2861 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2861' -Direction Inbound -Protocol UDP -LocalPort 2861 -Action Block

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2859activememory2860dialpad-voice12862ttg-protocol2863sonardata

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