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Port 1956 (vrtl-vmf-ds)

IANA assigns port 1956 to vrtl-vmf-ds: Vertel VMF DS.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vrtl-vmf-ds TCP Vertel VMF DS Alan Akahoshi -
vrtl-vmf-ds UDP Vertel VMF DS Alan Akahoshi -

Check what is listening on port 1956

Linux: is anything listening on TCP 1956?
sudo ss -tlnp 'sport = :1956'
Linux: UDP 1956
sudo ss -ulnp 'sport = :1956'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1956
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1956 '
Windows (Command Prompt)
netstat -ano | findstr :1956
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1956 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1956
From Windows
Test-NetConnection HOST -Port 1956
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1956

Block port 1956 in the firewall

ufw
sudo ufw deny 1956/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1956 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1956 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1956' -Direction Inbound -Protocol TCP -LocalPort 1956 -Action Block
ufw
sudo ufw deny 1956/udp
iptables
sudo iptables -A INPUT -p udp --dport 1956 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1956 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1956' -Direction Inbound -Protocol UDP -LocalPort 1956 -Action Block

Related ports

1954abr-api1955abr-secure1957unix-status1958dxadmind

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