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Port 5676 (raadmin)

IANA assigns port 5676 to raadmin: RA Administration.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
raadmin TCP RA Administration Sergei Zjaikin -
raadmin UDP RA Administration Sergei Zjaikin -

Registry dates for this port: registered 2002-02.

Check what is listening on port 5676

Linux: is anything listening on TCP 5676?
sudo ss -tlnp 'sport = :5676'
Linux: UDP 5676
sudo ss -ulnp 'sport = :5676'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5676
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5676 '
Windows (Command Prompt)
netstat -ano | findstr :5676
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5676 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5676
From Windows
Test-NetConnection HOST -Port 5676
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5676

Block port 5676 in the firewall

ufw
sudo ufw deny 5676/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5676 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5676 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5676' -Direction Inbound -Protocol TCP -LocalPort 5676 -Action Block
ufw
sudo ufw deny 5676/udp
iptables
sudo iptables -A INPUT -p udp --dport 5676 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5676 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5676' -Direction Inbound -Protocol UDP -LocalPort 5676 -Action Block

Related ports

5674hyperscsi-port5675v5ua5677questdb2-lnchr5678rrac

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