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Port 2029 (hsrpv6)

IANA assigns port 2029 to hsrpv6: Hot Standby Router Protocol IPv6.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
hsrpv6 TCP Hot Standby Router Protocol IPv6 Ian Wilson -
hsrpv6 UDP Hot Standby Router Protocol IPv6 Ian Wilson -

Registry dates for this port: registered 2004-11.

Check what is listening on port 2029

Linux: is anything listening on TCP 2029?
sudo ss -tlnp 'sport = :2029'
Linux: UDP 2029
sudo ss -ulnp 'sport = :2029'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2029
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2029 '
Windows (Command Prompt)
netstat -ano | findstr :2029
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2029 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2029
From Windows
Test-NetConnection HOST -Port 2029
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2029

Block port 2029 in the firewall

ufw
sudo ufw deny 2029/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2029 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2029 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2029' -Direction Inbound -Protocol TCP -LocalPort 2029 -Action Block
ufw
sudo ufw deny 2029/udp
iptables
sudo iptables -A INPUT -p udp --dport 2029 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2029 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2029' -Direction Inbound -Protocol UDP -LocalPort 2029 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.