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Port 7872 (mipv6tls)

IANA assigns port 7872 to mipv6tls: TLS-based Mobile IPv6 Security.

Registered (user) port, 1024-49151 UDP

Port 7872 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
mipv6tls UDP TLS-based Mobile IPv6 Security IESG RFC 6618

Registry dates for this port: registered 2012-04-12.

Check what is listening on port 7872

Linux: UDP 7872
sudo ss -ulnp 'sport = :7872'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7872
Windows (Command Prompt)
netstat -ano | findstr :7872
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 7872

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7872

Block port 7872 in the firewall

ufw
sudo ufw deny 7872/udp
iptables
sudo iptables -A INPUT -p udp --dport 7872 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7872 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7872' -Direction Inbound -Protocol UDP -LocalPort 7872 -Action Block

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