Sunday, February 10, 2019

URL Filtering & Identity Awareness Best Practices

URL 
  • Categorize HTTPS Sites
  • Fail Close (for best Security) or Fail open (for best User experience)
     Rule Base Order
  • More Specific rules closer to top
  • More restrictive rules close to top
    White List Policy 
  • Use below order as a template on how to create a policy where you block all traffic by only allow explicit traffic 




The regex wild card section also applies to other areas of whitelisting including URL Filtering.

  • Rule Base Order
    • More Specific rules closer to top
    • More restrictive rules closer to stop


  • White List Policy 
    • Use below order as a template on how to create a a policy where you block all traffic but only allow explicit traffic
Rule 1 – Allow DNS traffic or any other applications that are allowed
Rule 2 – Allow all “White List” URLs and URL categories
Rule 3 - Block any other category for both http and https sites
Rule 4 – Block other traffic other than SSL+Web Browsing
Rule 5 (not listed) – Block all other traffic 



      






  • Regex 
o   Leverage Regex rather than wild cards for Websites.  This will guarantee that all instances of website will get caught.  
§  *.balloons.com will match www.balloons.com and secure.balloons.com, but will not match balloons.com
§  (^|.*\.)?balloons\.com will match all iterations on the website whether or not a prefix is used

·      HTTPS Inspection – Enable HTTPS inspection for full visibility of your environment


Friday, February 1, 2019

R80.20 - Kernel Ver 3.10 - GPT Partition Table, XFS (partition and file system CHANGES





GaiA 3.10 Installation

Methods
  1. Upgrade/Install  =>   CPUSE   => Kernel3.10, MBR Partition Table, EXT3    (partition table and file system remains the same)
  2. Backup Machine data  => Clean installation  => Kernel 3.10, GPT Partition Table, XFS   (partition and file system CHANGES)

GaiA 3.10  (SK141173)  Upgraded Linux kernel (based on RHEL 7.x kernel 3.10)


Linux Kernel is upgraded to Version 3.10
- Support newer and more advanced hardware and appliances

Partition Table was upgraded from MBR (Master Boot Record) to GPT
  Adds support for large single storage devices

Introducing XFS Filesystem
Faster than EXT3, Specially with large files

Includes new and improved user space packages.


New system tools for debugging, monitoring and configuring the system:
  • iotop (provides I/O runtime stats)
  • lshw (provides detailed information about all HW)
  • lsusb (provides information about all devices connected to USB)
  • lsscsi (provides information about storage)
  • ps (new version, more counters)
  • psmisc (new version, more counters)
  • top (new version, more counters)
  • iostat (new version, more counters)