HTTPfy

Port 676 (vpps-via)

IANA assigns port 676 to vpps-via: VPPS Via.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vpps-via TCP VPPS Via Ulysses G Smith Jr -
vpps-via UDP VPPS Via Ulysses G Smith Jr -

Check what is listening on port 676

Linux: is anything listening on TCP 676?
sudo ss -tlnp 'sport = :676'
Linux: UDP 676
sudo ss -ulnp 'sport = :676'
Linux / macOS: which process owns the port
sudo lsof -nP -i :676
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':676 '
Windows (Command Prompt)
netstat -ano | findstr :676
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 676 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 676
From Windows
Test-NetConnection HOST -Port 676
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 676

Block port 676 in the firewall

ufw
sudo ufw deny 676/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 676 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 676 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 676' -Direction Inbound -Protocol TCP -LocalPort 676 -Action Block
ufw
sudo ufw deny 676/udp
iptables
sudo iptables -A INPUT -p udp --dport 676 -j DROP
nftables
sudo nft add rule inet filter input udp dport 676 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 676' -Direction Inbound -Protocol UDP -LocalPort 676 -Action Block

Related ports

674acap675dctp677vpp678ggf-ncp

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