Work with Stakeholders to Develop a Decryption Deployment Strategy
Table of Contents
Expand All
|
Collapse All
Next-Generation Firewall Docs
-
PAN-OS 9.1 (EoL)
- Cloud Management of NGFWs
- PAN-OS 10.0 (EoL)
- PAN-OS 10.1
- PAN-OS 10.2
- PAN-OS 11.0 (EoL)
- PAN-OS 11.1 & Later
- PAN-OS 9.1 (EoL)
-
- Management Interfaces
-
- Launch the Web Interface
- Configure Banners, Message of the Day, and Logos
- Use the Administrator Login Activity Indicators to Detect Account Misuse
- Manage and Monitor Administrative Tasks
- Commit, Validate, and Preview Firewall Configuration Changes
- Export Configuration Table Data
- Use Global Find to Search the Firewall or Panorama Management Server
- Manage Locks for Restricting Configuration Changes
-
-
- Define Access to the Web Interface Tabs
- Provide Granular Access to the Monitor Tab
- Provide Granular Access to the Policy Tab
- Provide Granular Access to the Objects Tab
- Provide Granular Access to the Network Tab
- Provide Granular Access to the Device Tab
- Define User Privacy Settings in the Admin Role Profile
- Restrict Administrator Access to Commit and Validate Functions
- Provide Granular Access to Global Settings
- Provide Granular Access to the Panorama Tab
- Panorama Web Interface Access Privileges
-
- Reset the Firewall to Factory Default Settings
-
- Plan Your Authentication Deployment
- Configure SAML Authentication
- Configure Kerberos Single Sign-On
- Configure Kerberos Server Authentication
- Configure TACACS+ Authentication
- Configure RADIUS Authentication
- Configure LDAP Authentication
- Configure Local Database Authentication
- Configure an Authentication Profile and Sequence
- Test Authentication Server Connectivity
- Troubleshoot Authentication Issues
-
- Keys and Certificates
- Default Trusted Certificate Authorities (CAs)
- Certificate Deployment
- Configure the Master Key
- Export a Certificate and Private Key
- Configure a Certificate Profile
- Configure an SSL/TLS Service Profile
- Replace the Certificate for Inbound Management Traffic
- Configure the Key Size for SSL Forward Proxy Server Certificates
-
- HA Overview
-
- Prerequisites for Active/Active HA
- Configure Active/Active HA
-
- Use Case: Configure Active/Active HA with Route-Based Redundancy
- Use Case: Configure Active/Active HA with Floating IP Addresses
- Use Case: Configure Active/Active HA with ARP Load-Sharing
- Use Case: Configure Active/Active HA with Floating IP Address Bound to Active-Primary Firewall
- Use Case: Configure Active/Active HA with Source DIPP NAT Using Floating IP Addresses
- Use Case: Configure Separate Source NAT IP Address Pools for Active/Active HA Firewalls
- Use Case: Configure Active/Active HA for ARP Load-Sharing with Destination NAT
- Use Case: Configure Active/Active HA for ARP Load-Sharing with Destination NAT in Layer 3
- Refresh HA1 SSH Keys and Configure Key Options
- HA Firewall States
- Reference: HA Synchronization
-
- Use the Dashboard
- Monitor Applications and Threats
- Monitor Block List
-
- Report Types
- View Reports
- Configure the Expiration Period and Run Time for Reports
- Disable Predefined Reports
- Custom Reports
- Generate Custom Reports
- Generate the SaaS Application Usage Report
- Manage PDF Summary Reports
- Generate User/Group Activity Reports
- Manage Report Groups
- Schedule Reports for Email Delivery
- Manage Report Storage Capacity
- View Policy Rule Usage
- Use External Services for Monitoring
- Configure Log Forwarding
- Configure Email Alerts
-
- Configure Syslog Monitoring
-
- Traffic Log Fields
- Threat Log Fields
- URL Filtering Log Fields
- Data Filtering Log Fields
- HIP Match Log Fields
- IP-Tag Log Fields
- User-ID Log Fields
- Tunnel Inspection Log Fields
- SCTP Log Fields
- Authentication Log Fields
- Config Log Fields
- System Log Fields
- Correlated Events Log Fields
- GTP Log Fields
- Syslog Severity
- Custom Log/Event Format
- Escape Sequences
- Forward Logs to an HTTP/S Destination
- Firewall Interface Identifiers in SNMP Managers and NetFlow Collectors
-
- User-ID Overview
- Enable User-ID
- Map Users to Groups
- Enable User- and Group-Based Policy
- Enable Policy for Users with Multiple Accounts
- Verify the User-ID Configuration
-
- App-ID Overview
- App-ID and HTTP/2 Inspection
- Manage Custom or Unknown Applications
-
- Apply Tags to an Application Filter
- Create Custom Application Tags
- Workflow to Best Incorporate New and Modified App-IDs
- See the New and Modified App-IDs in a Content Release
- See How New and Modified App-IDs Impact Your Security Policy
- Ensure Critical New App-IDs are Allowed
- Monitor New App-IDs
- Disable and Enable App-IDs
- Safely Enable Applications on Default Ports
- Applications with Implicit Support
- Application Level Gateways
- Disable the SIP Application-level Gateway (ALG)
- Maintain Custom Timeouts for Data Center Applications
-
- Best Practices for Securing Your Network from Layer 4 and Layer 7 Evasions
- Set Up Antivirus, Anti-Spyware, and Vulnerability Protection
- Set Up File Blocking
- Prevent Brute Force Attacks
- Customize the Action and Trigger Conditions for a Brute Force Signature
- Enable Evasion Signatures
- Monitor Blocked IP Addresses
- Threat Signature Categories
- Create Threat Exceptions
- Custom Signatures
- Threat Prevention Resources
-
- Decryption Overview
-
- Keys and Certificates for Decryption Policies
- SSL Forward Proxy
- SSL Forward Proxy Decryption Profile
- SSL Inbound Inspection
- SSL Inbound Inspection Decryption Profile
- SSL Protocol Settings Decryption Profile
- SSH Proxy
- SSH Proxy Decryption Profile
- Decryption Profile for No Decryption
- SSL Decryption for Elliptical Curve Cryptography (ECC) Certificates
- Perfect Forward Secrecy (PFS) Support for SSL Decryption
- SSL Decryption and Subject Alternative Names (SANs)
- High Availability Support for Decrypted Sessions
- Decryption Mirroring
- Configure SSL Forward Proxy
- Configure SSL Inbound Inspection
- Configure SSH Proxy
- Configure Server Certificate Verification for Undecrypted Traffic
- Enable Users to Opt Out of SSL Decryption
- Temporarily Disable SSL Decryption
- Configure Decryption Port Mirroring
- Verify Decryption
-
- How Decryption Broker Works
- Layer 3 Security Chain Guidelines
- Configure Decryption Broker with One or More Layer 3 Security Chain
- Transparent Bridge Security Chain Guidelines
- Configure Decryption Broker with a Single Transparent Bridge Security Chain
- Configure Decryption Broker with Multiple Transparent Bridge Security Chains
- Activate Free Licenses for Decryption Features
-
- About Palo Alto Networks URL Filtering Solution
- How Advanced URL Filtering Works
- URL Filtering Use Cases
- Plan Your URL Filtering Deployment
- URL Filtering Best Practices
- Activate The Advanced URL Filtering Subscription
- Configure URL Filtering
- Test URL Filtering Configuration
- Log Only the Page a User Visits
- Create a Custom URL Category
- URL Category Exceptions
- Use an External Dynamic List in a URL Filtering Profile
- Allow Password Access to Certain Sites
- URL Filtering Response Pages
- Customize the URL Filtering Response Pages
- HTTP Header Logging
- Request to Change the Category for a URL
-
-
- Tap Interfaces
-
- Layer 2 and Layer 3 Packets over a Virtual Wire
- Port Speeds of Virtual Wire Interfaces
- LLDP over a Virtual Wire
- Aggregated Interfaces for a Virtual Wire
- Virtual Wire Support of High Availability
- Zone Protection for a Virtual Wire Interface
- VLAN-Tagged Traffic
- Virtual Wire Subinterfaces
- Configure Virtual Wires
- Configure an Aggregate Interface Group
- Use Interface Management Profiles to Restrict Access
- Virtual Routers
- Service Routes
- RIP
- Route Redistribution
-
- DNS Overview
- DNS Proxy Object
- DNS Server Profile
- Multi-Tenant DNS Deployments
- Configure a DNS Proxy Object
- Configure a DNS Server Profile
- Use Case 1: Firewall Requires DNS Resolution
- Use Case 2: ISP Tenant Uses DNS Proxy to Handle DNS Resolution for Security Policies, Reporting, and Services within its Virtual System
- Use Case 3: Firewall Acts as DNS Proxy Between Client and Server
- DNS Proxy Rule and FQDN Matching
- Dynamic DNS Overview
- Configure Dynamic DNS for Firewall Interfaces
-
- NAT Rule Capacities
- Dynamic IP and Port NAT Oversubscription
- Dataplane NAT Memory Statistics
-
- Translate Internal Client IP Addresses to Your Public IP Address (Source DIPP NAT)
- Enable Clients on the Internal Network to Access your Public Servers (Destination U-Turn NAT)
- Enable Bi-Directional Address Translation for Your Public-Facing Servers (Static Source NAT)
- Configure Destination NAT with DNS Rewrite
- Configure Destination NAT Using Dynamic IP Addresses
- Modify the Oversubscription Rate for DIPP NAT
- Reserve Dynamic IP NAT Addresses
- Disable NAT for a Specific Host or Interface
-
-
- Policy Types
- Policy Objects
- Track Rules Within a Rulebase
- Enforce Policy Rule Description, Tag, and Audit Comment
- Move or Clone a Policy Rule or Object to a Different Virtual System
-
- External Dynamic List
- Built-in External Dynamic Lists
- Configure the Firewall to Access an External Dynamic List
- Retrieve an External Dynamic List from the Web Server
- View External Dynamic List Entries
- Exclude Entries from an External Dynamic List
- Enforce Policy on an External Dynamic List
- Find External Dynamic Lists That Failed Authentication
- Disable Authentication for an External Dynamic List
- Register IP Addresses and Tags Dynamically
- Use Dynamic User Groups in Policy
- Use Auto-Tagging to Automate Security Actions
- CLI Commands for Dynamic IP Addresses and Tags
- Application Override Policy
- Test Policy Rules
-
PAN-OS 10.1
- PAN-OS 10.1
- PAN-OS 10.2
- PAN-OS 11.0 (EoL)
- PAN-OS 11.1 & Later
-
- Tap Interfaces
-
- Layer 2 and Layer 3 Packets over a Virtual Wire
- Port Speeds of Virtual Wire Interfaces
- LLDP over a Virtual Wire
- Aggregated Interfaces for a Virtual Wire
- Virtual Wire Support of High Availability
- Zone Protection for a Virtual Wire Interface
- VLAN-Tagged Traffic
- Virtual Wire Subinterfaces
- Configure Virtual Wires
- Configure an Aggregate Interface Group
- Configure Bonjour Reflector for Network Segmentation
- Use Interface Management Profiles to Restrict Access
-
- DNS Overview
- DNS Proxy Object
- DNS Server Profile
- Multi-Tenant DNS Deployments
- Configure a DNS Proxy Object
- Configure a DNS Server Profile
- Use Case 1: Firewall Requires DNS Resolution
- Use Case 2: ISP Tenant Uses DNS Proxy to Handle DNS Resolution for Security Policies, Reporting, and Services within its Virtual System
- Use Case 3: Firewall Acts as DNS Proxy Between Client and Server
- DNS Proxy Rule and FQDN Matching
-
- NAT Rule Capacities
- Dynamic IP and Port NAT Oversubscription
- Dataplane NAT Memory Statistics
-
- Translate Internal Client IP Addresses to Your Public IP Address (Source DIPP NAT)
- Enable Clients on the Internal Network to Access your Public Servers (Destination U-Turn NAT)
- Enable Bi-Directional Address Translation for Your Public-Facing Servers (Static Source NAT)
- Configure Destination NAT with DNS Rewrite
- Configure Destination NAT Using Dynamic IP Addresses
- Modify the Oversubscription Rate for DIPP NAT
- Reserve Dynamic IP NAT Addresses
- Disable NAT for a Specific Host or Interface
-
- Network Packet Broker Overview
- How Network Packet Broker Works
- Prepare to Deploy Network Packet Broker
- Configure Transparent Bridge Security Chains
- Configure Routed Layer 3 Security Chains
- Network Packet Broker HA Support
- User Interface Changes for Network Packet Broker
- Limitations of Network Packet Broker
- Troubleshoot Network Packet Broker
-
-
Cloud Management and AIOps for NGFW
- Cloud Management and AIOps for NGFW
- PAN-OS 10.0 (EoL)
- PAN-OS 10.1
- PAN-OS 10.2
- PAN-OS 11.0 (EoL)
- PAN-OS 11.1
- PAN-OS 11.2
- PAN-OS 8.1 (EoL)
- PAN-OS 9.0 (EoL)
- PAN-OS 9.1 (EoL)
End-of-Life (EoL)
Work with Stakeholders to Develop a Decryption Deployment Strategy
To understand the traffic you should and should not decrypt,
work with other invested groups, including finance, HR, IT, legal,
and executives to ensure that you don’t decrypt sensitive traffic
but do decrypt everything else.
Work with stakeholders such as legal, finance, HR, executives,
security, and IT/support to develop a decryption deployment strategy.
Start by getting the required approvals to decrypt traffic to secure
the corporation. Decrypting traffic involves understanding how legal
regulations and business needs affect what you can and can’t decrypt.
Identify and prioritize the traffic you want to decrypt. The
best practice is to decrypt as much traffic as you can to gain visibility
into potential threats in encrypted traffic and prevent those threats.
If incorrect firewall sizing prevents you from decrypting all of
the traffic you want to decrypt, prioritize the most critical servers, the
highest-risk traffic categories, and less trusted segments and IP
subnets. To help prioritize, ask yourself questions such as, “What
happens if this server is compromised?” and “How much risk am I
willing to take in relation to the level of performance I want to
achieve?”
Next, identify traffic that you can’t decrypt because the traffic
breaks decryption for technical reasons such as a pinned certificate,
an incomplete certificate chain, unsupported ciphers, or mutual
authentication. Decrypting sites that break decryption technically
results in blocking that traffic. Evaluate the websites that break
decryption technically and ask yourself if you need access to those
sites for business reasons. If you don’t need access to those sites,
allow decryption to block them. If you need access to any of those
sites for business purposes, add them to the SSL Decryption Exclusion list
to except them from decryption. The SSL Decryption Exclusion list
is exclusively for sites that break decryption technically.
Identify sensitive traffic that you choose not to decrypt
for legal, regulatory, personal, or other reasons, such as financial,
health, or government traffic, or the traffic of certain executives.
This is not traffic that breaks decryption technically, so you don’t
use the SSL Decryption Exclusion list to except this traffic from decryption.
Instead, you Create
a Policy-Based Decryption Exclusion to identify and control
traffic you choose not to decrypt and apply the No Decryption decryption
profile to the policy to prevent servers with certificate issues
from accessing the network. Policy-based decryption exclusions are
only for traffic you choose not to decrypt.
When you plan decryption policy, consider your company’s security
compliance rules, computer usage policy, and your business goals.
Extremely strict controls can impact the user experience by preventing
access to non-business sites the user used to access, but may be
required for government or financial institutions. There is always
a tradeoff between usability, management overhead, and security.
The tighter the decryption policy, the greater the chance that a
website will become unreachable, which may result in user complaints
and possibly modifying the rulebase.
Although a tight decryption policy may initially cause
a few user complaints, those complaints can draw your attention
to unsanctioned or undesirable websites that are blocked because
they use weak algorithms or have certificate issues. Use complaints
as a tool to better understand the traffic on your network.
Different groups of users and even individual users may require
different decryption policies, or you may want to apply the same
decryption policy to all users. For example, executives may be exempted
from decryption policies that apply to other employees. And you
may want to apply different decryption policies to employee groups,
contracts, partners, and guests. Prepare updated legal and HR computer
usage policies to distribute to all employees, contractors, partners,
guests, and any other network users so that when you roll out decryption,
users understand their data can be decrypted and scanned for threats.
How you handle guest users depends on the access they require. Isolate
guests from the rest of your network by placing them on a separate
VLAN and on a separate SSID for wireless access. If guests don’t
need to access your corporate network, don’t let them on it and
there will be no need to decrypt their traffic. If guests need to
access your corporate network, decrypt their traffic:
- Enterprises don’t control guest devices. Decrypt guest traffic and subject it to your guest Security policy so the firewall can inspect the traffic and prevent threats. To do this, redirect guest users through a captive portal, instruct them how to download and install the CA certificate, and clearly notify guests that their traffic will be decrypted. Include the process in your company’s privacy and computer usage policy.
- Create separate Decryption policy rules and Security policy rules to tightly control guest access so that guests can only access the areas of your network that they need to access.
Similarly to different groups of users, decide which devices
to decrypt and which applications to decrypt. Today’s networks support
not only corporate devices, but BYOD, mobile, remote-user and other
devices, including contractor, partner, and guest devices. Today’s
users attempt to access many sites, both sanctioned and unsanctioned,
and you should decide how much of that traffic you want to decrypt.
Enterprises don’t control BYOD devices. If you allow BYOD devices
on your network, decrypt their traffic and subject it to the same
Security policy that you apply to other network traffic so the firewall
can inspect the traffic and prevent threats. To do this, redirect
BYOD users through a captive portal, instruct them how to download
and install the CA certificate, and clearly notify users that their
traffic will be decrypted. Educate BYOD users about the process
and include it in your company’s privacy and computer usage policy.
Decide what traffic you want to log and investigate what traffic
you can log. Be aware of local laws regarding what types of data
you can log and store, and where you can log and store the data.
For example, local laws may prevent logging and storing personal
information such as health and financial data.
Decide how to handle bad certificates. For example, will you
block or allow sessions for which the certificate status is unknown?
Understanding how you want to handle bad certificates determines
how you configure the decryption profiles that you attach to decryption
policies to control which sessions you allow based on the server
certificate verification status.