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Port 2765 (qip-audup)

IANA assigns port 2765 to qip-audup.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
qip-audup TCP qip-audup Mike Morgan -
qip-audup UDP qip-audup Mike Morgan -

Check what is listening on port 2765

Linux: is anything listening on TCP 2765?
sudo ss -tlnp 'sport = :2765'
Linux: UDP 2765
sudo ss -ulnp 'sport = :2765'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2765
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2765 '
Windows (Command Prompt)
netstat -ano | findstr :2765
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2765 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2765
From Windows
Test-NetConnection HOST -Port 2765
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2765

Block port 2765 in the firewall

ufw
sudo ufw deny 2765/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2765 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2765 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2765' -Direction Inbound -Protocol TCP -LocalPort 2765 -Action Block
ufw
sudo ufw deny 2765/udp
iptables
sudo iptables -A INPUT -p udp --dport 2765 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2765 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2765' -Direction Inbound -Protocol UDP -LocalPort 2765 -Action Block

Related ports

2763desktop-dna2764data-insurance2766compaq-scp2767uadtc

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