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97 lines
4.3 KiB
Markdown
Linux FAQs with Answers--How to install Shrew Soft IPsec VPN client on Linux
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> **Question**: I need to connect to an IPSec VPN gateway. For that, I'm trying to use Shrew Soft VPN client, which is available for free. How can I install Shrew Soft VPN client on [insert your Linux distro]?
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There are many commercial VPN gateways available, which come with their own proprietary VPN client software. While there are also open-source VPN server/client alternatives, they are typically lacking in sophisticated IPsec support, such as Internet Key Exchange (IKE) which is a standard IPsec protocol used to secure VPN key exchange and authentication. Shrew Soft VPN is a free IPsec VPN client supporting a number of authentication methods, key exchange, encryption and firewall traversal options.
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Here is how you can install Shrew Soft VPN client on Linux platforms.
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First, download its source code from the [official website][1].
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### Install Shrew VPN Client on Debian, Ubuntu or Linux Mint ###
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Shrew Soft VPN client GUI requires Qt 4.x. So you will need to install its development files as part of dependencies.
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$ sudo apt-get install cmake libqt4-core libqt4-dev libqt4-gui libedit-dev libssl-dev checkinstall flex bison
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$ wget https://www.shrew.net/download/ike/ike-2.2.1-release.tbz2
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$ tar xvfvj ike-2.2.1-release.tbz2
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$ cd ike
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$ cmake -DCMAKE_INSTALL_PREFIX=/usr -DQTGUI=YES -DETCDIR=/etc -DNATT=YES .
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$ make
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$ sudo make install
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$ cd /etc/
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$ sudo mv iked.conf.sample iked.conf
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### Install Shrew VPN Client on CentOS, Fedora or RHEL ###
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Similar to Debian based systems, you will need to install a number of dependencies including Qt4 before compiling it.
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$ sudo yum install qt-devel cmake gcc-c++ openssl-devel libedit-devel flex bison
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$ wget https://www.shrew.net/download/ike/ike-2.2.1-release.tbz2
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$ tar xvfvj ike-2.2.1-release.tbz2
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$ cd ike
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$ cmake -DCMAKE_INSTALL_PREFIX=/usr -DQTGUI=YES -DETCDIR=/etc -DNATT=YES .
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$ make
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$ sudo make install
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$ cd /etc/
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$ sudo mv iked.conf.sample iked.conf
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On Red Hat based systems, one last step is to open /etc/ld.so.conf with a text editor, and add the following line.
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$ sudo vi /etc/ld.so.conf
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include /usr/lib/
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Reload run-time bindings of shared libraries to incorporate newly installed shared libraries:
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$ sudo ldconfig
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### Launch Shrew VPN Client ###
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First launch IKE daemon (iked). This daemon speaks the IKE protocol to communicate with a remote host over IPSec as a VPN client.
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$ sudo iked
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Now start qikea which is an IPsec VPN client front end. This GUI application allows you to manage remote site configurations and to initiate VPN connections.
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To create a new VPN configuration, click on "Add" button, and fill out VPN site configuration. Once you create a configuration, you can initiate a VPN connection simply by clicking on the configuration.
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### Troubleshooting ###
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1. I am getting the following error while running iked.
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iked: error while loading shared libraries: libss_ike.so.2.2.1: cannot open shared object file: No such file or directory
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To solve this problem, you need to update the dynamic linker to incorporate libss_ike library. For that, add to /etc/ld.so.conf the path where the library is located (e.g., /usr/lib), and then run ldconfig command.
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$ sudo ldconfig
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Verify that libss_ike is added to the library path:
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$ ldconfig -p | grep ike
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libss_ike.so.2.2.1 (libc6,x86-64) => /lib/libss_ike.so.2.2.1
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libss_ike.so (libc6,x86-64) => /lib/libss_ike.so
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--------------------------------------------------------------------------------
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via: http://ask.xmodulo.com/install-shrew-soft-ipsec-vpn-client-linux.html
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作者：[Dan Nanni][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://ask.xmodulo.com/author/nanni
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[1]:https://www.shrew.net/download/ike |