Steps to configure Cyberoam SSL VPN Client in Linux:

Step 1: Download SSL VPN Client Configuration
  • Logon to SSL VPN portal with the help of username and password of SSL VPN policy member.
    https://<IP Address>:8443<Port Number>
    login1.jpg

  • Click Download SSL VPN Client Configuration to download and install SSL VPN client.
    login2.jpg
Step 2: Linux Configuration

  • Extract file using command "tar"
    [root@server~]#tar zxvf clientbundle.tgz

  • Go to "CRSSLconfig/pem" folder and open the file client.crssl
    [root@server pem]#vim client.crssl

  • Comment following lines in the configuration file:

    #dhcp-renew
    #dhcp-release

    Add following lines at the end of configuration file:

    status crssl_client_status.log
    ca ./RootCertificate.pem
    cert ./UserCertificate.pem
    key ./UserPrivateKey.key

    Save and exit from configuration file

  • Install Open VPN, by following below mentioned command
    [root@server ~]# yum install openvpn

  • Configure Open VPN, by following below mentioned command
    [root@server pem]# openvpn --config client.crssl

    Fri Jul 6 08:21:37 2012 OpenVPN 2.1.4 i386-redhat-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] built on Apr 24 2011
    Enter Auth Username:cyberoam
    Enter Auth Password:******

    Enter the SSL VPN username and password


Step 3: After successfully validate the username and password, your system will get a free IP from Cyberoams VPN Tunnel Leased IP range

Fri Jul 6 08:36:54 2012 /sbin/ip link set dev tun0 up mtu 1500
Fri Jul 6 08:36:54 2012 /sbin/ip addr add dev tun0 10.10.111.3/24 broadcast 10.10.111.255
Fri Jul 6 08:36:54 2012 /sbin/ip route add 10.10.12.0/24 via 10.10.111.1
Fri Jul 6 08:36:54 2012 /sbin/ip route add 10.10.10.180/32 via 10.10.111.1
Fri Jul 6 08:36:54 2012 /sbin/ip route add 10.10.11.0/27 via 10.10.111.1
Fri Jul 6 08:36:54 2012 Initialization Sequence Completed


Now following Steps are need be performed to run openvpn client in background and disconnect it.

  • Press CTRL+ Z,it will stop the job.

  • Type bg and press Enter, it will run the job in background.

  • Type fg and press Enter, it will bring the job foreground

  • Press CTRL+C, it will disconnect the SSL VPN connection.