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Month: October 2017

Cisco Site to Site GRE VPN Tunnel with EIGRP

Cisco Site to Site GRE VPN Tunnel with EIGRP

What is a GRE tunnel? Generic Routing Encapsulation (GRE) is a tunneling protocol that lets you run a routing protocol between endpoints. This example will create a GRE tunnel between two routers and will run EIGRP between the two. Topology Summary: 192.168.13.0/24 will be the Tunnel Network IP block  Router-1 lo0 10.1.1.0/24 e0/0 192.1.12.2 Router-2 lo0 10.2.2.0/24 e0/0 192.1.23.2 Router-1 interface tunnel1 ip address 192.168.13.1 255.255.255.0 tunnel source 192.1.12.1 tunnel destination 192.1.23.3 router eigrp 100 no auto-summ net 192.168.13.0 net…

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Cisco IOS Site to Site VPN

Cisco IOS Site to Site VPN

Five steps to configuring an IPSec Site to Site VPN! Configure Phase I – ISAKMP Parameters Configure Phase II – ESP Parameters Configure the interesting traffic ACL Link the above parameters to each other using a Crypto Map Apply the Crpyto Map to the outbound interface Notes: Items below between < > are meant to be replaced with a value Phase 1 parameters: pre shared key: cisco123 Peer IP:  192.1.23.3 Phase 1 encryption:  3des Phase 1 hash:  md5 Phase 1…

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FortiGate SSL VPN Internal DNS Resolution v5.4

FortiGate SSL VPN Internal DNS Resolution v5.4

You’ve setup your FortiGate firewall, configured SSL VPN and deployed your clients.  Your users can log in but they need to use fully qualified domain names to resolve hosts internally. To create a better user experience, you want to append your DNS domain name to your SSL VPN users when they connect, just like when they are in the office.  It’s pretty straight forward assuming you already have SSL VPN configured, if you don’t follow this guide: FortiGate SSL VPN…

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FortiGate Agent Based FSSO AD Integration v5.4

FortiGate Agent Based FSSO AD Integration v5.4

If you want to report on user Internet usage and possibly even define access rules based on your Active Directory groups this document is for you.  We’ll install the FSSO Collector Agent in basic mode, identify the groups we are interested in and setup the FortiGate. The FSSO Collector will monitor the Windows security logs on your domain controller for log on and log off events, these events contain the IP address of the computer that logged on or off…

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Cisco FirePOWER DNS Security Intelligence Policy v6

Cisco FirePOWER DNS Security Intelligence Policy v6

DNS-based Security Intelligence allows you to use your FirePOWER implementation to blacklist traffic based on the domain name lookup requested by a client workstation. What’s cool is that items configured here are blocked BEFORE access control rules so you can block bad traffic without wasting resources inspection it further based on the work Cisco has already done, and continues to do via the Cisco Talos Security Intelligence and Research Group.  These lists we’ll select below are automatically updated as Cisco…

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FortiGate Managed Access Point Tunnel Mode v5.4

FortiGate Managed Access Point Tunnel Mode v5.4

This example will use a FortiGate firewall to manage FortiAP access points.  We’ll create what’s called a tunnel-mode wireless network, which means the wireless clients will be on a different network then the wired clients.  The FortiGate firewall will also provide DHCP services to both wired and wireless clients. Creating the wireless network Pick an interface that will have the AP connected to it, this can be on the local FortiGate or a local FortiGate port that’s connected to a…

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FortiGate Managed Access Point Bridge Mode v5.4

FortiGate Managed Access Point Bridge Mode v5.4

This example will use a FortiGate firewall to manage FortiAP access points.  We’ll create what’s called a bridge-mode wireless network, which means the wireless clients will be on the same network as the wired clients.  The FortiGate firewall will also provide DHCP services to both wired and wireless clients. I’ll assume you already have an outbound policy created to allow traffic from inside your network out to the Internet.  Because in this example the wired and wireless traffic will be…

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FortiGate Periodically Dropping Comcast Connection v5.4

FortiGate Periodically Dropping Comcast Connection v5.4

This quick post is to document an issue we’ve seen enough times to make this change part of our standard deployment. Issue:  New FortiGate installation seems to drop Comcast Internet connection for a minute periodically. This isn’t a link monitor issue or anything complex.  The problem comes down to some Comcast modems, other providers I’m sure have a similar issue. When a FortiGate is deployed, the FortiGaurd service uses port 53 for updates.  When these impacted modems see non DNS…

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FortiGate Category Filtering Office 365 Issue v5.4

FortiGate Category Filtering Office 365 Issue v5.4

Content filtering is a great feature with the FortiGate firewalls but the nature of what’s happening behind the scenes means some web sites do not like to be inspected and some users don’t fit the standard policy. For example, if you enable blocking unrated categories with your web filtering, and you have Office 365 there’s a good chance your users will start getting errors with Office 365.  A bit of tweaking fixes this, but it would be better to know…

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FortiGate Geo Blocking v5.4

FortiGate Geo Blocking v5.4

I’m frequently asked to block users from accessing certain countries and it can help prevent exploits if your users have no business connecting to some of these countries.  This is called Geo Blocking and it’s pretty easy to setup. Setup address object for the country you want to block Navigate to Policy & Objects > Addresses and click Create New Address Enter the name of the country in question Change the Type to Geography Change the Country to the country…

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FortiGate Content Filtering Per User Override v5.4

FortiGate Content Filtering Per User Override v5.4

Content filtering is a great feature with the FortiGate firewalls but the nature of what’s happening behind the scenes means some web sites do not like to be inspected and some users don’t fit the standard policy. Issue:  Blocking A Category but need to create an exception So maybe your organization blocks the Social Networking category for all users but now HR can’t check out candidates and they need access.  We’ll fix this with an exemption and a new policy…

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FortiGate Block Website v5.4

FortiGate Block Website v5.4

This post shows you how to block an individual website with a static URL filter. Navigate to Security Profiles > Web Filter Scroll down to Static URL filter and enable URL Filter (if it’s not already) Click Create Enter the url you want to block.  I’m using facebook.com for this example and since I want to block all things facebook.com I’m making this a Wildcard block and using *facebook.com for the entry.  Click OK Make sure you have an outbound…

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FortiGate Outbound Static NAT using IP Pools v5.4

FortiGate Outbound Static NAT using IP Pools v5.4

Say you have a block of static IP addresses from your provider.  You are using one of them for the external IP address of your FortiGate, this is typically applied as the NAT address for your inside traffic to access the Internet. If you have an internal server that you want to use one of your other static IP addresses instead this is the process for you.  This is commonly done for something like an internal mail server that you…

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FortiGate Inbound Port Forwarding using VIP’s v5.4

FortiGate Inbound Port Forwarding using VIP’s v5.4

This article goes over creating an inbound port forward NAT rule on a FortiGate device.  This allows inbound access to a resource behind your firewall using your public IP address. For this example we’ll create a rule that allows HTTP (port 80) and SMTP (port 25) pointed at one internal server resource. The external IP address (WAN interface side) for this example is 1.1.1.1 The internal IP address (inside interface side) for this example is 2.2.2.2 First we’re going to…

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FortiGate AD Authentication for SSL VPN v5.4

FortiGate AD Authentication for SSL VPN v5.4

Active Directory is a great authentication system, already in use on your network if you have a Windows Server based infrastructure so it makes sense to leverage for authenticating your SSL VPN users rather then creating separate, local login accounts. Before you set this up on the FortiGate you first need to setup a service account on your windows server.  Yes, you could use an already existing account but it’s advisable to use something separate so if/when you need to…

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