Sophos Tunnelblick

01-05-2021
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Oct 25, 2020 Overview This article describes the steps to troubleshoot SSL VPN remote access connectivity and data transfer issues. Before proceeding to troubleshoot, please verify that the SSL VPN remote access is configured correctly by following Sophos XG Firewall: How to configure SSL VPN remote access. Most problems people think they have with Tunnelblick are really problems they are having with OpenVPN, so what follows is a mix of information about Tunnelblick and OpenVPN. OpenVPN is such a powerful tool with so many options, and computer configurations are so varied, that it is difficult to have an exhaustive guide to troubleshooting problems. Sophos Virus Removal installed by Tunnelblick' Client 6.1 or earlier - Spiceworks Common Problems processes. Third uninstall all for on-premise installation or Sophos UTM Support Common is the same as you the insight you and Uninstall String search Service Uses our Behavioral viruses and other malware Problems - Tunnelblick used. Tunnelblick helps you control OpenVPN ® VPNs on macOS. It is Free Software that puts its users first. There are no ads, no affiliate marketers, no tracking — we don't even keep logs of your IP address or other information. We just supply open technology for fast, easy, private, and secure control of VPNs. How to use the Tunnelblick app to set up an SSL VPN connection to a Sophos XG Firewall.

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39,167 downloadsUpdated: April 22, 2021GPL / Donationware

Free and open source Graphical User Interface for OpenVPN that offers quick and easy control of the OpenVPN client and server connections

What's new in Tunnelblick 3.8.6 Build 5690 Beta 2:

Sophos
  • Updates Openvpn 2.5.1 to 2.5.2. See Overview of changes in 2.5.2 for details.
  • Updates Openvpn 2.4.10 to 2.4.11. See Overview of changes in 2.4.11 for details.
  • Optionally allows the code from an authentication device to be entered in the VPN login window with the username and password.
Read the full changelog

Tunnelblick is a user-friendly and unobtrusive macOS application that enables you to take control over the OpenVPN client and server connections from within a simple and clean interface.

Complete package to connect to a VPN server from your Mac

The Tunnelblick utility comes with all the necessary binaries and drivers, including OpenVP, tun/tap drivers and easy-rsa. Hence, you are not required to install any additional binaries or drivers. To start using Tunnelblick you just need to add your configuration and encryption information.

It is worth mentioning that you also need access to a VPN server since your Mac is at one end of the tunnel and the VPN server is at the other end.

Intuitive and easy to use user interface

Sophos tunnelblick vpn

By accessing Tunnelblick’s status bar menu, you can easily view all active connections, disconnect or connect to the desired network, add a new VPN, quit the app and open Tunnelblick’s main window.

The great thing about Tunnelblick is that you can install OpenVPN or Tunnelblick VPN configuration files with just a few mouse clicks.

The Configurations tab helps you view all existing configurations, check their log and change their settings. Additionally, you can connect or disconnect from a server and copy the log to your Mac’s clipboard.

What is more, Tunnelblick is capable to use sound notifications when the connection is established or when the connects is interrupted. From the Preferences tab you can reassign the keyboard shortcut, set the maximum log display size and check for updates.

Notification Center integration and powerful built-in utilities

Thanks to the Appearance tab, you can switch between the standard and the monochrome status bar icon and place it next to the Spotlight icon. You can also choose when the notification window should be displayed and the type of information that should contain.

The Utilities tab helps you quit all OpenVPN processes, copy the console log to clipboard and open easy-rsa in a Terminal window.

All in all, Tunnelblick is a comprehensive and streamlined software solution that helps you connect to any VPN server using OpenVPN to secure and encrypt all your site-to-site or point-to-point connections.

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Tunnelblick was reviewed by Sergiu Gatlan
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SYSTEM REQUIREMENTS

Sophos Tunnelblick Free

  • 64-bit processor
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Tunnelblick 3.8.5a Build 5671 / 3.8.6 Build 5690 Beta 2

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Tunnelblick_3.8.5a_build_5671.dmg
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Installing Tunnelblick
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Common Problems
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On This Page
If OpenVPN is connected to the server but you can't access the Internet
How to check your DNS settings
How to use a different DNS server
Use a different DNS server whether or not a VPN is active
Use a different DNS server only when the VPN is active
If OpenVPN is connected to the server but your IP address does not change
How to test your IP address

Troubleshooting this problem could be very simple: try connecting the VPN with and without 'Set nameserver' selected. If one way or the other solves your problem, you're done!

OpenVPN is such a powerful tool with so many options, and computer configurations are so varied, that it is impossible to have an exhaustive troubleshooting guide. This guide is meant for the most common setups, so if it doesn't apply to your situation, or doesn't help, see the Support page for guidance.

This page assumes that you are successfully connected to a VPN server. If not, or if you aren't sure, look at Common Problems.

If OpenVPN is connected to the server but you can't access the Internet

After connecting, if you can't reach the Internet, it's likely that your setup has

  • A DNS problem and/or
  • A routing problem and/or
  • A problem with the VPN server

Tunnelblick includes the ability to diagnose some DNS problems and will warn you about some common configuration problems.

Check for a DNS problem:
If OpenVPN connected to the server properly, but you are having trouble connecting to websites, the first thing to find out is if there is a DNS problem. To check that, try to access a website by using its IP address instead of its name. If the IP address works, but the name doesn't, there is a DNS problem. (Consider the IP address to be 'working' if any of the webpage loads.)

If you don't have a DNS problem then there is something else going on. See the Support page for guidance.

If you have a DNS problem:

  1. See if your network settings manually specify a DNS server. If they do, that server will be used even when the VPN is active unless you put a check in 'Allow changes to manually-set network settings' on Tunnelblick's 'Advanced' settings page. If the manual DNS server is your ISP's DNS server, it is probably set up to ignore queries that come from outside the network. When you are connected to the VPN, your queries come from the VPN server, which is probably outside the ISP's network, so the ISP's DNS server will ignore your request. You should set up your computer to use a free public DNS server (see How to use a different DNS server, below) while the VPN is active.

  2. If your DNS settings are specified by DHCP, check your DNS settings both before you connect to the VPN and while you are connected.
    • If the DNS settings are the same, try setting up your computer to use a free public DNS server (see How to use a different DNS server, below).
    • If the DNS settings are different, the VPN is using a DNS server specified by the VPN setup. Contact the person who maintains your VPN server to find out why that DNS server is not functioning properly.

How to check your DNS settings

  1. Launch System Preferences,
  2. Click 'Network'
    Your DNS server list is one of the entries on the right. It is a list of IP addresses, separated by commas. macOS will use the first one unless it fails to respond to requests, in which case it will try the second, then the third, etc.

Note: If the DNS server list is dimmed (grayed out), it was set via DHCP, not manually.

How to use a different DNS server

There are two ways to set up a different DNS server:

Use a different DNS server whether or not a VPN is active

You can set your computer up to use a different DNS server all the time. Google Public DNS is free, and OpenDNS has a free version. There are lots of others. To use such a DNS server all the time (whether or not a VPN is connected):

  1. Launch System Preferences,
  2. Click 'Network'
  3. Copy/paste the following '8.8.8.8,8.8.4.4,208.67.222.222,208.67.220.220' (without the quotation marks) into the box to the right of 'DNS Server'

This will set up your computer to always (whether or not you are connected to the VPN) use two Google DNS servers and two OpenDNS servers (in that order). Substitute the addresses for the DNS provider of your choice if you want.

Use a different DNS server only when the VPN is active

Note: This will only work if you specify 'Set nameserver' in Tunnelblick's settings for the configuration.

Add a line to your OpenVPN configuration file for each DNS server: 'dhcp-option DNSaddress' (substitute the DNS server's IP address for address). (To add two servers, add two lines to the OpenVPN configuration file, one for each server.)

If OpenVPN is connected to the server but your IP address does not change

If you have a check in the 'Check if the apparent public IP address changed after connecting' checkbox on the 'Settings' tab of Tunnelblick's 'VPN Details' window, and your IP address doesn't change after connecting, a window will pop up to notify you.

If OpenVPN connects to the server properly but your IP address does not change, your OpenVPN setup needs to include the '--redirect-gateway' option. By default, OpenVPN only sends some traffic through the VPN — traffic that is specifically destined for the VPN network itself. The '--redirect-gateway' option tells OpenVPN to send all IPv4 traffic through the VPN.

There are three ways the option can be added; you need only use one:

  • Put a check in the 'Route all Ipv4 traffic through the VPN' checkbox on the 'Settings' tab of Tunnelblick's 'VPN Details' window.
  • Add this: redirect-gateway def1 as a separate line in your client's OpenVPN configuration file.
  • Add this: push 'redirect-gateway def1' as a separate line in your server's OpenVPN configuration file.

(The '--' at the start of an OpenVPN option is omitted when the option appears in a configuration file.)

How to test your IP address

You can find out what IP address your computer is using by going to https://tunnelblick.net/ipinfo.

The first number shown is your apparent public IP address:

Note: tunnelblick.net does not use Javascript, other client-side scripting, plugins, trackers, beacons, or web bugs, and it does not carry advertising. It does not store cookies or any other data on your computer (except as noted in the tunnelblick.net privacy policy).

If you have checked 'Check if the apparent public IP address changed after connecting', the IP address will be displayed in the Tunnelblick menu while you are connected: