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Before You Begin

Use this document to install and begin setting up your Palo Alto Networks PA-820 or PA-850 next-generaton firewall. Refer 
to the PA-800 Series Next Gen Firewall Reference at 

https://docs.paloaltonetworks.com/hardware

 for safety information, 

specifications, and more detailed procedures for installing the firewall.

 

Verify that the installation site has adequate air circulation and AC power.

 

Have a #1 and #2 Phillips-head torque driver available. Use the #1 Phillips-head bit to attach the rack-mount brackets to the firewall and use 

the #2 bit to secure the rack-mount brackets to the equipment rack posts.

 

Unpack the equipment and verify that you received the following items: 

Rack Mount the Firewall

The PA-800 Series firewall ships with two rack-mount brackets for installation in a a two-post or four-post 19” equipment rack. 
If you install the firewall in a four-post rack, you can purchase an optional four-post kit to secure the firewall to the back rack 
posts to provide additional support. Both procedures are covered in this section. 

Install the Firewall in a Two-Post Equipment Rack

Attach one rack-mount bracket to each side of the firewall using four #6-32 x 5/16” screws for each bracket, as shown in Figure 1, and torque 
to 9 in-lbs. For a two-post rack, we recommend that you install the brackets in the mid-mount position as Figure 1 demonstrates. For a four-
post rack or cabinet, install the rack-mount brackets in the front-mount position as shown in Figure 3.  
 

 
 

With help from another person, hold the firewall in place in the rack and secure the rack-mount brackets to the rack using two screws for each 
bracket as shown in Figure 2. Use the appropriate screws (#10-32 x 3/4” or #12-24 x 1/2”) for your rack and torque to 25 in-lbs. Use cage nuts 
(not provided) to secure the screws if the rack has square holes. 

Figure 1

Figure 2

Figure 3

Figure 4

Figure 6

(Optional) Install the Four-Post Rack Kit

Attach one rack-mount bracket to each side of the firewall using four #6-32 x 5/16” screws for each bracket as shown in Figure 3 and torque 
to 9 in-lbs.

Attach one side rack-mount rail to each side of the firewall using two #6-32 x 5/16” screws for each bracket and torque to 9 in-lbs. See 
Figure 4. The side rack-mount rail screws ship with the four-post rack kit.

With help from another person, hold the firewall in the rack and secure the rack-mount brackets to the front rack posts using two screws for 
each bracket, as shown in Figure 5. Use the appropriate screws (#10-32 x 3/4” or #12-24 x 1/2”) for your rack and torque to 25 in-lbs. Use 
cage nuts (not provided) to secure the screws if the rack has square holes. 

Slide one back rack-mount bracket into each of the two previously installed side rack-mount rails and secure the brackets to the back rack 
posts using the appropriate screws for your rack (#10-32 x 3/4” or #12-24 x 1/2”) and torque to 25 in-lbs. See Figure 6.

Figure 5

Qty Description

1

PA-800 Series next-generation firewall.

1 or 2

AC power cord (the PA-820 firewall ships with 1 cord and the PA-850 ships with 2 cords). 

2

(PA-850 only) Velcro straps to secure the AC power cords to the power supplies.

1

Standard Type-A USB to micro USB console cable.

1

Standard RJ-45 CAT6 Ethernet cable for management (MGT) port access.

2

Front rack-mount brackets used to secure the firewall to a two-post or four-post equipment rack. 

8

#6-32 x 5/16” front rack-mount bracket screws to attach the front rack-mount brackets to the firewall.

4

#10-32 x 3/4” rack-mount screws to secure the front rack-mount brackets to a rack with #10-32 threaded holes.

4

#12-24 x 1/2” rack-mount screws to secure the front rack-mount brackets to a rack with #12-24 threaded holes.

1

End User License Agreement (EULA).

1

China RoHS declaration.

PA-800 Series

Quick Start Guide

1

2

 

Ensure that the equipment rack is properly anchored so it can support the weight of the installed equipment. 

docs.paloaltonetworks.com

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