HTTPfy

Port 2787 (piccolo)

IANA assigns port 2787 to piccolo: piccolo - Cornerstone Software.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
piccolo TCP piccolo - Cornerstone Software Dave Bellivea -
piccolo UDP piccolo - Cornerstone Software Dave Bellivea -

Check what is listening on port 2787

Linux: is anything listening on TCP 2787?
sudo ss -tlnp 'sport = :2787'
Linux: UDP 2787
sudo ss -ulnp 'sport = :2787'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2787
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2787 '
Windows (Command Prompt)
netstat -ano | findstr :2787
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2787 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2787
From Windows
Test-NetConnection HOST -Port 2787
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2787

Block port 2787 in the firewall

ufw
sudo ufw deny 2787/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2787 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2787 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2787' -Direction Inbound -Protocol TCP -LocalPort 2787 -Action Block
ufw
sudo ufw deny 2787/udp
iptables
sudo iptables -A INPUT -p udp --dport 2787 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2787 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2787' -Direction Inbound -Protocol UDP -LocalPort 2787 -Action Block

Related ports

2785aic-np2786aic-oncrpc2788fryeserv2789media-agent

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