Use this VNS3 set up guide to get started in CenturyLink Cloud environments. About VNS3: VNS3 delivers cloud networking and NFV functionality for virtual and cloud environments. The VNS3 virtual network security appliance includes a router, switch, stateful firewall, VPN support (IPsec and SSL), and protocol redistributor, and extensible NFV optimized for all major cloud providers. VNS3 cloud networks are configured and managed through the VNS3 Manager web-based UI or resetful API. VNS3 is available in: Amazon Web Services EC2, Amazon Web Services VPC, Microsoft Azure, CenturyLink Cloud, Google Compute Engine (GCE), Rackspace, IBM SoftLayer, ElasticHosts, Verizon Terremark vCloud Express, InterRoute, Abiquo, Openstack, Flexiant, Eucalyptus, Abiquo, HPE Helion, VMware (all formats), Citrix, Xen, KVM, and more. VNS3 supports most IPsec data center solutions, including: Preferred Most models from Cisco Systems*, Juniper, Watchguard, Dell SONICWALL, Netgear, Fortinet, Barracuda Networks, Check Point*, Zyxel USA, McAfee Retail, Citrix Systems, Hewlett Packard, D-Link, WatchGuard, Palo Alto Networks, OpenSwan, pfSense, Vyatta, and any IPsec device that supports IKE1 or IKE2, AES256 or AES128 or 3DES, SHA1 or MD5, and most importantly NAT-Traversal standards.

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CenturyLink Cloud
Configuration
CenturyLink Setup for VNS3
2016

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Table of Contents
2
Introduction 3
CenturyLink Cloud Deployment Setup 9
VNS3 Configuration Document Links 14

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Requirements
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Requirements
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•You have a CenturyLink Cloud account.
•You have the ability to configure a client (whether desktop based or cloud based) to use
OpenVPN client software.
•You have a compliant IPsec firewall/router networking device:
Preferred Most models from Cisco Systems*, Juniper, Watchguard, Dell SONICWALL, Netgear,
Fortinet, Barracuda Networks, Check Point*, Zyxel USA, McAfee Retail, Citrix Systems, Hewlett
Packard, D-Link, WatchGuard, Palo Alto Networks, OpenSwan, pfSense, and Vyatta.
Best Effort Any IPsec device that supports: IKE1 or IKE2, AES256 or AES128 or 3DES, SHA1 or
MD5.
*Known Exclusions Checkpoint R65+ requires native IPSec connections as Checkpoint does
not conform to NAT-Traversal Standards and Cisco ASA 8.4(2)-8.4(4) bugs prevent a stable
connection from being maintained.

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Getting Help with VNS3
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This guide covers a generic VNS3 setup in CenturyLink Cloud. If you need specific help
with project planning, POCs, or audits, contact our professional services team via
sales@cohesive.net for details.
This guide uses Cisco’s Adaptive Security Device Controller UI. Setting up your IPsec
Extranet device may have a different user experience than what is shown here. All the
information entered in this guide will be same regardless of your UI or cmd line setup.
Please review the VNS3 Support Plans and Contacts before sending support inquiries.

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Firewall Considerations
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VNS3 Controller instances use the following TCP and UDP ports.
• UDP port 1194
For client VPN connections; must be accessible from all servers that will join VNS3 topology as clients.
• UDP 1195-1203*
For tunnels between Controller peers; must be accessible from all peers in a given topology.
• TCP port 8000
HTTPS admin interface; must be accessible from hosts where you will want to obtain runtime status or configure peering, also needs to be open to and from
the Controllers at least for the peering process, and needs to be accessible when downloading credentials for installation on overlay network clients.
• UDP port 500
UDP port 500 is used the phase 1 or IKE (Internet Key Exchange) component of an IPsec VPN connection.
• UDP port 4500 or Protocol 50 (ESP)
Protocol 50 is used for phase 2 or ESP (Encapsulated Security Payload) component of an IPsec VPN connection only when negotiating with native IPsec. UDP
port 4500 is used for the phase 2 or ESP (Encapsulated Security Payload) component of an IPsec VPN connection when using NAT-Traversal Encapsulation.
*VNS3:vpn and VNS3:net Lite Edition will not require UDP ports 1195-1197 access as it is not licensed for Controller Peering.
** Some public cloud providers require IPsec connections to use NAT-Traversal encapsulation on UDP port 4500

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Sizing Considerations
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Image Size and Architecture
VNS3 Controller Images are available as 64bit images to allow the greatest flexibility for your use-case. We
recommend Controller instances be launched with at least 512MB of RAM. Smaller sizes are supported but the
performance will depend on the use-case.
Clientpack Key Size
VNS3 Controllers currently generate 1024 bit keys for connecting the clients to the overlay network via the
“clientpacks”. Smaller or larger encryption keys can be provided upon request (from 64 bit to 2048 bit). Future
releases of VNS3 will provide the user control over key size and cipher during initialization and configuration.

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Remote Support
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Note that TCP 22 (ssh) is not required for normal operations.
Each VNS3 Controller is running a restricted SSH daemon,
with access limited only to Cohesive for debugging purposes
controlled by the user via the Remote Support toggle and
key exchange generation.
In the event Cohesive needs to observe runtime state of a
VNS3 Controller in response to a tech support request, we
will ask you to open Security Group access to SSH from our
support IP range and Enable Remote Support via the Web UI.
Cohesive will send you an encrypted passphrase to generate
a private key used by Cohesive Support staff to access your
Controller. Access to the restricted SSH daemon is
completely controlled by the user. Once the support ticket
has been closed you can disable remote support access and
invalidate the access key.

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CenturyLink Cloud Deployment Setup
9

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CLC: Select VNS3 Blueprint & and Build
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Login to your CenturyLink Cloud (CLC) account and go
to the Blueprints Library listed in the top green menu
bar.
In the Blueprint Library select the edition of VNS3 you
wish to use.
On the next page click on deploy blueprint.
On the Deploy page enter a password, and select DNS
names for the server. NOTE: Here you can select
HYPERSCALE under Server Type to allow CLC to scale
your VNS3 server up and down as demands change.
Give your targeted VNS3 instance a name.
Click on next step.
Look for 8/8 steps to finish.

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Request VNS3 be deployed in CLC
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Open a service task request ticket via email to ServiceTasks@ctl.io with the following details. You will need to edit some of the information below.
TO: ServiceTasks@ctl.io
EMAIL SUBJECT: Custom Image Import Request for Ecosystem Partner Template
CLC Support Team, Please open a Service Task to implement a Cohesive Networks Partner Template in accordance with this CenturyLink Policy (https://t3n.zendesk.com/hc/en-us/articles/204538645) and the following requirements
below.
Please import the Ecosystem Partner Template image file referenced below to my CenturyLink Cloud Account:
Import CenturyLink Ecosystem Partner Source Image: “Cohesive Networks VNS3 virtual appliance”
My CenturyLink Cloud Account Alias: ####
Data Center to import image to: ###
(Optional) Group to import Server to: #####
Server Name to import image as: ##########
VLAN in the account to add the Server to: ########
Additional Information to add Partner Template to Network:
Interface=eth0
VLAN_free_IP=#.#.#.#
VLAN_net_mask=#.#.#.#
VLAN_gateway=#.#.#.#
DNS_servers=#.#.#.#
Please let me know if you have any questions or issues. Kindly send me a reply once the work has been completed.
Thank you very much, Your_Name_Here

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Request VNS3 be deployed in CLC: email servicetasks@ctl.io
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EMAIL SUBJECT: Custom Image Import Request for Ecosystem Partner Template
CLC Support Team, Please open a Service Task to implement a Cohesive Networks Partner Template in accordance with this
CenturyLink Policy (https://t3n.zendesk.com/hc/en-us/articles/204538645) and the following requirements below. Please import
the Ecosystem Partner Template image file referenced below to my CenturyLink Cloud Account:
Import CenturyLink Ecosystem Partner Source Image: “Cohesive Networks VNS3 virtual appliance”
My CenturyLink Cloud Account Alias: ####
Data Center to import image to: ###
(Optional) Group to import Server to: #####
Server Name to import image as: ##########
VLAN in the account to add the Server to: ########
Additional Information to add Partner Template to Network:
Interface=eth0
VLAN_free_IP=#.#.#.#
VLAN_net_mask=#.#.#.#
VLAN_gateway=#.#.#.#
DNS_servers=#.#.#.#

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CLC Configuration: Public IP Access
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Once your VNS3 image has been built, go to the
Dashboard. Locate the server name you just built
and select that server.
Then click on the add public IP button.
Click custom Port, to add the following required
inbound hypervisor firewall access rules:
• TCP port 8000
• UDP port 1194
• UDP 1195-1197
• UDP port 500, and possibly UDP port 4500
When finished, you will find the Public IP is now
listed on the on the server page.

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VNS3 Controller Log in
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Login to the VNS3 Web UI - https://<Controller IP>:8000
Default username: vnscubed
Default password: vnscubed
Reset your passwords:
• Reset the Web UI Password - Even though the instance id is
unlikely to be “guessed”, please change it for security purposes.
• NOTE: Your VNS3 Controller answers to API calls on the same
port 8000 as the web interface runs on. Ideally make a
separate password for the API usage against the Controller.
• Reset the API Password - Even though the instance id is unlikely
to be “guessed”, please change it for security purposes, again
making it a different password than the web interface is
probably best.
NOTE: Cohesive does not have any key access or remote access to
your VNS3 Controllers unless provided by you. If you forget these
passwords we cannot recover them for you.

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VNS3 Configuration Document Links
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VNS3 Configuration Document Links
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VNS3 Product Resources - Documentation | Add-ons
VNS3 Configuration Instructions
Instructions and screenshots for configuring a VNS3 Controller in a single or multiple Controller topology. Specific steps include,
initializing a new Controller, generating clientpack keys, setting up peering, building IPsec tunnels, and connecting client servers to
the Overlay Network.
VNS3 Administration Document
Covers the administration and operation of a configured VNS3 Controller. Additional detail is provided around the VNS3 Firewall,
all administration menu items, upgrade licenses, other routes and SNMP traps.
VNS3 Docker Instructions
Explains the value of the VNS3 3.5 Docker integration and covers uploading, allocating and exporting application containers.
VNS3 Troubleshooting
Troubleshooting document that provides explanation issues that are more commonly experienced with VNS3.