The sleep commands are used to space out theĮxecutions of the commands so that each can complete their startup Identity file specified (-i), in terminal mode (-t), with the options The options passed to ssh configure it to run without escapeĬharacters (-e), using the blowfish crypto algorithm (-c), using the What this does is run ssh, redirecting the input and output to pppd. This is done with something similar to the following sequence of commands: /usr/sbin/pty-redir /usr/bin/ssh -t -e none -o 'Batchmode yes' -c blowfish -i /root/.ssh/identity.vpn -l joe > /tmp/vpn-device The link is created by running pppd through a pseudo terminal that is created by pty-redir and connected to ssh. Here's a complete guide to IPSEC for linux and you may want to try this: You can try to configure your VPN without the Fortinet GUI.
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