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Port 395 (netcp)

IANA assigns port 395 to netcp: NetScout Control Protocol.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
netcp TCP NetScout Control Protocol Ashwani Singhal -
netcp UDP NetScout Control Protocol Ashwani Singhal -

Registry dates for this port: registered 2010-04-07.

Check what is listening on port 395

Linux: is anything listening on TCP 395?
sudo ss -tlnp 'sport = :395'
Linux: UDP 395
sudo ss -ulnp 'sport = :395'
Linux / macOS: which process owns the port
sudo lsof -nP -i :395
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':395 '
Windows (Command Prompt)
netstat -ano | findstr :395
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 395 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 395
From Windows
Test-NetConnection HOST -Port 395
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 395

Block port 395 in the firewall

ufw
sudo ufw deny 395/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 395 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 395 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 395' -Direction Inbound -Protocol TCP -LocalPort 395 -Action Block
ufw
sudo ufw deny 395/udp
iptables
sudo iptables -A INPUT -p udp --dport 395 -j DROP
nftables
sudo nft add rule inet filter input udp dport 395 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 395' -Direction Inbound -Protocol UDP -LocalPort 395 -Action Block

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