For a more detailed tutorial refer to Site-to-Site with IPsec
First create a IAM Instance Role with full VPC access. This is needed to allow the Pritunl Link client to modify the VPC routing table.
Create a security group and open
4500 to allow IPsec traffic. The clients must also have HTTPS access to the Pritunl cluster.
Launch an Amazon Linux 2 server in the VPC that is going to be linked. Select the IAM role created earlier. Use the startup script below.
Below is the startup script that can be put it in the User data or run manually. The first pritunl-link command needs to be run if the Pritunl server does not have a signed HTTPS certificate. The data will be signed and encrypted with AES independently an unsigned certificate will not effect security. The second command sets the provider to
aws. The third command will add the URI, this needs to be replaced by clicking Get URI in the Pritunl web console. This command can be run multiple times if more then one link is configured. The
pritunl-link verify-off line can be left out if the Pritunl server is configured with a valid SSL certificate. It is not necessary to verify the SSL certificate, the sensitive data is encrypted with AES-256 and signed with HMAC SHA-512 using the token and secret in the URI.
tee /etc/yum.repos.d/pritunl.repo << EOF [pritunl] name=Pritunl baseurl=https://repo.pritunl.com/stable/yum/amazonlinux/2/ gpgcheck=1 enabled=1 EOF rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 7568D9BB55FF9E5287D586017AE645C0CF8E292A gpg --armor --export 7568D9BB55FF9E5287D586017AE645C0CF8E292A > key.tmp; rpm --import key.tmp; rm -f key.tmp yum -y update yum -y install pritunl-link pritunl-link verify-off pritunl-link provider aws pritunl-link add pritunl://token:firstname.lastname@example.org
Right click on the instance and select Networking then Change Source/Dest. Check to disable the source/dest check. This is needed to allow the instance to transmit network traffic from other networks.
The commands below can be run to check the logs and status of the link. The
pritunl-link service will already be running and connected once the URI is added.
cat /var/log/pritunl_link.log sudo ipsec status