Juniper SRX550 Services Gateway firewall SRX550-645AP-M with 4G DRAM, 8G CF and 1 AC PSU

Juniper SRX550-645AP-M Services Gateway (SRX550)

The Juniper SRX550-645AP-M (SRX550 / SRX550M) is an enterprise-grade services gateway / next-generation firewall platform built for medium-to-large branch offices that need strong security enforcement, reliable routing, and flexible WAN connectivity in a single appliance. This specific configuration includes 4 GB DRAM, 8 GB CompactFlash (CF) storage, and ships with one 645W AC power supply (single PSU included, with dual PSU slots supported on the chassis).

SRX550 is designed to be deployed as the secure edge for branch networks where uptime, throughput, and policy consistency matter. It helps you consolidate security and network functions instead of managing separate devices for firewalling, VPN, and routing—useful for organizations scaling to multiple branches, retail sites, warehouses, or distributed offices.

Why SRX550-645AP-M is a strong branch firewall choice

1) High-performance firewall + security services
SRX550 is positioned for higher-demand branches and supports published performance figures such as up to 7 Gbps firewall performance (max), 800 Mbps IPS performance, and 1.0 Gbps VPN performance (figures depend on traffic mix and enabled services).

2) Secure connectivity between branches and HQ
If your business relies on secure site-to-site connectivity, SRX platforms commonly serve as a VPN edge (IPsec) to encrypt traffic between branch locations and headquarters or data centers. This is essential for protecting internal systems, remote users, and sensitive business traffic across the public internet. (VPN performance reference above.)

3) Segmentation and policy control that scales
In real branch networks, the goal isn’t only “block attacks,” but also control who can access what. SRX deployments typically focus on:

• separating users from servers

• isolating guest Wi-Fi from corporate resources

• limiting IoT device reach

• restricting management access to only IT networks

This kind of segmentation reduces blast radius when something goes wrong and makes compliance easier.

Hardware and expansion highlights (what buyers care about)

The SRX550-645AP-M base system is a 2U platform and includes a mix of built-in ports plus expansion options:

• 6x 10/100/1000BASE-T (RJ45) ports

• 4x 1GbE SFP ports

• 6 GPIM slots and 2 Mini-PIM slots for modular expansion

• Dual power supply slots (this unit ships with one AC PSU installed)

• Integrated fans and chassis designed for continuous operation

This modular design is valuable when your branch requirements vary by site (extra WAN circuits, different handoffs, or port density needs). It also helps keep your standard platform consistent while tailoring interfaces per location.

Typical deployment scenarios

Use the Juniper SRX550-645AP-M when you need an edge gateway that can comfortably handle higher branch traffic and security workloads, such as:

• Enterprise branch firewall for busy offices with many users/devices

• Retail or multi-site environments needing consistent policy templates

• Secure WAN edge where IPsec VPN capacity and stability matter

• Network segmentation projects (users/servers/guest/IoT separation)

• Migration to standardized security across multiple branches