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Port 1741 (cisco-net-mgmt)

IANA assigns port 1741 to cisco-net-mgmt.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
cisco-net-mgmt TCP cisco-net-mgmt John McCormack -
cisco-net-mgmt UDP cisco-net-mgmt John McCormack -

Check what is listening on port 1741

Linux: is anything listening on TCP 1741?
sudo ss -tlnp 'sport = :1741'
Linux: UDP 1741
sudo ss -ulnp 'sport = :1741'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1741
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1741 '
Windows (Command Prompt)
netstat -ano | findstr :1741
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1741 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1741
From Windows
Test-NetConnection HOST -Port 1741
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1741

Block port 1741 in the firewall

ufw
sudo ufw deny 1741/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1741 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1741 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1741' -Direction Inbound -Protocol TCP -LocalPort 1741 -Action Block
ufw
sudo ufw deny 1741/udp
iptables
sudo iptables -A INPUT -p udp --dport 1741 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1741 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1741' -Direction Inbound -Protocol UDP -LocalPort 1741 -Action Block

Related ports

1739webaccess1740encore17423Com-nsd1743cinegrfx-lm

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