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Port 2711 (sso-control)

IANA assigns port 2711 to sso-control: SSO Control.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sso-control TCP SSO Control Axel Kern -
sso-control UDP SSO Control Axel Kern -

Check what is listening on port 2711

Linux: is anything listening on TCP 2711?
sudo ss -tlnp 'sport = :2711'
Linux: UDP 2711
sudo ss -ulnp 'sport = :2711'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2711
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2711 '
Windows (Command Prompt)
netstat -ano | findstr :2711
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2711 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2711
From Windows
Test-NetConnection HOST -Port 2711
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2711

Block port 2711 in the firewall

ufw
sudo ufw deny 2711/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2711 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2711 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2711' -Direction Inbound -Protocol TCP -LocalPort 2711 -Action Block
ufw
sudo ufw deny 2711/udp
iptables
sudo iptables -A INPUT -p udp --dport 2711 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2711 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2711' -Direction Inbound -Protocol UDP -LocalPort 2711 -Action Block

Related ports

2709supermon2710sso-service2712aocp2713raventbs

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