Best Firewall For Voip

TP-Link Omada Multi-Gigabit VPN Router (ER707-M2) - Up to 6 WAN Ports & Load Balance, High - Security VPN, SSL/IPSec/GER§ /PPTP/L2TP VPN, Multi-Net DHCP, Powerful Firewall

GL.iNet GL-MT300N-V2(Mango) Portable Mini Travel Wireless Pocket VPN WiFi Router - Access Point/Extender/WDS | OpenWrt | 2 x Ethernet Ports | OpenVPN/Wireguard VPN | USB 2.0 | 128MB RAM

Ubiquiti Unifi Security Appliance (USG)

Grandstream GS-HT812 2 FXS Port 2 SIP Profiles ATA Router

Ubiquiti UniFi Wireless Dream Machine | UDM-US, Single Band

HPE Networking Instant On Switch Series 1430 16-Port Gb Unmanaged Layer 2 Ethernet Switch with PoE | 16x 1G | 16x CL4 PoE (124W) | Fan-Less | US Cord (R8R48A#ABA)

Zyxel Next Generation VPN Firewall with 1 WAN, 1 SFP, 4 LAN/DMZ Gigabit Ports and 802.11ac/n WiFi USG20W-VPN

GRANDSTREAM - HT813 VoIP SIP ATA/Router, 1 x FXS, 1 x FXO, 1 x Fast Ethernet LAN, 1 x Fast E

Grandstream HT814 AES 4-FXS Office HD NAT Router 2-SIP Voip Gateway

GL.iNet GL-AR300M16 Portable Mini Travel Wireless Pocket Router - WiFi Router/Access Point/Extender/WDS | OpenWrt | 2 x Ethernet Ports | OpenVPN/Wireguard VPN | USB 2.0 Port