HTTPfy

Port 2690 (hp-nnm-data)

IANA assigns port 2690 to hp-nnm-data: HP NNM Embedded Database.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
hp-nnm-data TCP HP NNM Embedded Database Chris Das -
hp-nnm-data UDP HP NNM Embedded Database Chris Das -

Check what is listening on port 2690

Linux: is anything listening on TCP 2690?
sudo ss -tlnp 'sport = :2690'
Linux: UDP 2690
sudo ss -ulnp 'sport = :2690'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2690
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2690 '
Windows (Command Prompt)
netstat -ano | findstr :2690
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2690 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2690
From Windows
Test-NetConnection HOST -Port 2690
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2690

Block port 2690 in the firewall

ufw
sudo ufw deny 2690/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2690 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2690 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2690' -Direction Inbound -Protocol TCP -LocalPort 2690 -Action Block
ufw
sudo ufw deny 2690/udp
iptables
sudo iptables -A INPUT -p udp --dport 2690 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2690 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2690' -Direction Inbound -Protocol UDP -LocalPort 2690 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.