Troubleshooting OpenVPN get the solutions you need to troubleshoot any issue you may face to keep your OpenVPN up and running
Get the solutions you need to troubleshoot any issue you may face to keep your OpenVPN up and running About This Book This is the first book on the market that resolves your issues related to troubleshooting OpenVPN Ensure your organization's private network is protected 24x7 by resolving OpenV...
| Otros Autores: | |
|---|---|
| Formato: | Libro electrónico |
| Idioma: | Inglés |
| Publicado: |
Birmingham, [England] ; Mumbai, [India] :
Packt
2017.
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| Edición: | 1st edition |
| Materias: | |
| Ver en Biblioteca Universitat Ramon Llull: | https://discovery.url.edu/permalink/34CSUC_URL/1im36ta/alma991009630089406719 |
Tabla de Contenidos:
- Cover
- Copyright
- Credits
- About the Author
- About the Reviewer
- www.PacktPub.com
- Customer Feedback
- Table of Contents
- Preface
- Chapter 1: Troubleshooting Basics
- A recommended toolkit
- Log search and filtering
- grep
- less, more, and most
- Regular expressions
- Network sniffing and analysis
- tcpdump
- traceroute
- mtr
- ping
- Wireshark
- X.509 verification and inspection
- OpenSSL
- Wireshark
- Troubleshooting basics
- Summary
- Chapter 2: Common Problems
- Narrowing the focus
- Sample scenarios
- Scenario 1-unable to access VPN
- Scenario 2-cannot access external web when on VPN
- Suspecting recent changes
- Supported operating systems
- Embedded devices
- Semi-embedded systems
- Virtual servers
- IP addresses
- Firewalls
- Duplicate client certificates
- Overcomplication
- Summary
- Chapter 3: Installing OpenVPN
- Common installation problems
- Compiling OpenVPN
- Packages and installers
- The advantages of precompiled installers
- Driver installation
- Alternative clients
- Summary
- Chapter 4: The Log File
- Logging options
- Logging levels
- Verbosity 0
- Verbosity 1
- Verbosity 4
- Verbosity 7
- Common log messages
- Startup messages
- Version and compile string
- Option warnings
- Configuration parameters
- Operational messages
- Certificate messages
- Summary
- Chapter 5: Client and Server Startup
- File and process permissions
- Privilege de-escalation
- Networking privileges
- Port assignment and use
- Multiple daemons
- Adapter and routing table changes
- Chroot
- Scripting
- Up and down scripts
- Connect and disconnect scripts
- UDP troubleshooting
- UDP and firewalls
- Summary
- Chapter 6: Certificates and Authentication
- File permissions
- Pre-shared keys
- Certificate authentication
- Certificate chain overview.
- The Certificate Revocation List
- System date and time
- Authentication and plugins
- Usernames and passwords
- ccd-exclusive
- Summary
- Chapter 7: Network and Routing
- Connectivity
- Inbound connection-server
- Publicly addressed server
- Privately addressed server with port forwarding
- Outbound connection-client
- Firewall filters and inspection
- TLS authentication
- Routing
- Internal routing
- External routing
- Pushing routes
- Routes behind clients
- Kernel versus process routing
- Route conflicts
- Redirect gateway
- General network concerns
- Path MTU and MSS
- Summary
- Chapter 8: Performance
- Networking
- Rate limiting
- Cryptographic performance
- Library differences
- Cipher and AES-NI
- Result summary
- Single thread
- Summary
- Chapter 9 : External Problems
- Inspection and filtering
- Obfuscation
- Encryption
- Geographic and source address exclusions
- What can be done
- Source IP address
- DNS settings
- Routing path performance
- Summary
- Useful links
- Manual or man pages
- Release notes
- Support channels
- Index.
