Port 6418 (syserverremote)

IANA assigns port 6418 to syserverremote: SYserver remote commands.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

syserverremote TCP SYserver remote commands David Ashkenazi -

Registry dates for this port: registered 2010-03-23.

Linux: is anything listening on TCP 6418?

sudo ss -tlnp 'sport = :6418'

Linux / macOS: which process owns the port

sudo lsof -nP -i :6418

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':6418 '

Windows (Command Prompt)

netstat -ano | findstr :6418

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6418 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 6418

From Windows

Test-NetConnection HOST -Port 6418

ufw

sudo ufw deny 6418/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 6418 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 6418 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 6418' -Direction Inbound -Protocol TCP -LocalPort 6418 -Action Block

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