Log Intra Data Center Traffic That Matches the Intrazone Allow Rule
Table of Contents
9.1
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- What Is a Data Center Best Practice Security Policy?
- Why Do I Need a Data Center Best Practice Security Policy?
- Data Center Best Practice Methodology
- How Do I Deploy a Data Center Best Practice Security Policy?
- How to Assess Your Data Center
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- Create the Data Center Best Practice Antivirus Profile
- Create the Data Center Best Practice Anti-Spyware Profile
- Create the Data Center Best Practice Vulnerability Protection Profile
- Create the Data Center Best Practice File Blocking Profile
- Create the Data Center Best Practice WildFire Analysis Profile
- Use Cortex XDR to Protect Data Center Endpoints
- Create Data Center Traffic Block Rules
- Order the Data Center Security Policy Rulebase
- Maintain the Data Center Best Practice Rulebase
- Use Palo Alto Networks Assessment and Review Tools
Log Intra Data Center Traffic That Matches the Intrazone
Allow Rule
Data centers are a good place for attackers to hide because
security often focuses on users and overlooks servers. Log east-west
traffic between servers and look for anomalous behaviors that may
indicate the presence of an attacker.
By default, all intrazone traffic (source
and destination in the same zone) is allowed. After the firewall
evaluates Security policy, it either allows traffic controlled by
application allow list rules, denies traffic controlled by block
rules, or if intrazone traffic matches no rules, the firewall allows
it by default. (The firewall blocks interzone traffic by default.)
Because of the valuable nature of data center assets, the best practice
is to monitor all traffic inside the data center between data center
servers, including traffic allowed by the intrazone default allow
rule.
To gain visibility into this traffic, enable logging
on the intrazone-default rule when it applies to traffic within
zones inside the data center. Logging this traffic gives you the
opportunity to examine access that you have not explicitly allowed
and which you may want to either explicitly allow by modifying an
allow rule or explicitly block.
In Define
the Initial Intra-Data-Center Traffic Security Policy, we
used three example zones inside the data center: Web-Server-Tier-DC, App-Server-Tier-DC,
and DB-Server-Tier-DC. In this example, we create a custom report to gather log information
about data center intrazone traffic in these three internal data
center zones.
- Select the intrazone-default row in the rulebase and clickOverrideto enable editing the rule.
- Select theintrazone-defaultrule name to edit the rule.
- On the Actions tab, selectLog at Session Endand clickOK.
- Create a custom report to monitor traffic that hits this rule for the internal data center zones.
- Select.MonitorManage Custom Reports
- Adda report and give it a descriptiveName. In this example, the name isLog Intrazone-Default Rule-DC.
- Set theDatabasetoTraffic Summary.
- Select theScheduledbox.
- FromAvailable Columns, addApplication,Risk of App,Rule, andThreatto theSelected Columnslist. If there are other types of information you want to monitor, select those as well.
- Set the desiredTime Frame,Sort By, andGroup Byvalues. In this example, the selected values areThreatsandApp Category, respectively.
- Define the query to match traffic that matches the intrazone-default rule for the data center zones:(rule eq interzone-default) and ((zone eq Web-Server-Tier-DC) or (zone eq App-Server-Tier-DC) or (zone eq DB-Server-Tier-DC))The query filters for traffic that matches the interzone default rule and also matches any of the three internal data center zones that we defined. Because the defaultSelected Columnsinclude zones, the report shows the zone for each session. In a real-world data center, you would probably have more zones and you would add each zone to the query. The resulting custom report settings look like this:
- Committhe changes.