Port 2127 (index-pc-wb)

IANA assigns port 2127 to index-pc-wb: INDEX-PC-WB.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

index-pc-wb TCP INDEX-PC-WB James David Fisher -

index-pc-wb UDP INDEX-PC-WB James David Fisher -

Linux: is anything listening on TCP 2127?

sudo ss -tlnp 'sport = :2127'

Linux: UDP 2127

sudo ss -ulnp 'sport = :2127'

Linux / macOS: which process owns the port

sudo lsof -nP -i :2127

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':2127 '

Windows (Command Prompt)

netstat -ano | findstr :2127

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2127 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 2127

From Windows

Test-NetConnection HOST -Port 2127

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 2127

ufw

sudo ufw deny 2127/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 2127 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 2127 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 2127' -Direction Inbound -Protocol TCP -LocalPort 2127 -Action Block

ufw

sudo ufw deny 2127/udp

iptables

sudo iptables -A INPUT -p udp --dport 2127 -j DROP

nftables

sudo nft add rule inet filter input udp dport 2127 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 2127' -Direction Inbound -Protocol UDP -LocalPort 2127 -Action Block

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