HTTPfy

Port 7546 (cfs)

IANA assigns port 7546 to cfs: Cisco Fabric service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
cfs TCP Cisco Fabric service Rituparna Agrawal -
cfs UDP Cisco Fabric service Rituparna Agrawal -

Registry dates for this port: registered 2005-09.

Check what is listening on port 7546

Linux: is anything listening on TCP 7546?
sudo ss -tlnp 'sport = :7546'
Linux: UDP 7546
sudo ss -ulnp 'sport = :7546'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7546
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7546 '
Windows (Command Prompt)
netstat -ano | findstr :7546
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7546 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7546
From Windows
Test-NetConnection HOST -Port 7546
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7546

Block port 7546 in the firewall

ufw
sudo ufw deny 7546/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7546 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7546 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7546' -Direction Inbound -Protocol TCP -LocalPort 7546 -Action Block
ufw
sudo ufw deny 7546/udp
iptables
sudo iptables -A INPUT -p udp --dport 7546 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7546 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7546' -Direction Inbound -Protocol UDP -LocalPort 7546 -Action Block

Related ports

7544nta-ds7545nta-us7547TR-069 (CWMP)7548tidp

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