Cisco Catalyst 9200 / 9300 DNA Licensing
KB ID 0001750 Problem I get asked this at least once a month, “What’s the score with this DNA Licensing?” It took long enough for everyone to get used to Lan Base, IP Base, and IP Services! The cynic in me would say, Cisco have learned from Meraki that selling subscription licences is much better than selling products that you don’t get any recurring revenue from. But I’ll try an give you the short answer...
Replacing Cisco Firewalls with Fortinet Firewalls
KB ID 0001741 Replacing Cisco If you’ve been following articles on the site you will know that the focus of the firewall related output is shifting from Cisco ASA / Cisco FirePOWER to Fortinet (FortiGate) firewalls. This article is so you can make an informed choice about what you want to replace your Cisco firewall with. Note: I’m starting with SOHO and Small Business sized firewalls, but I will extend this to...
Cisco ASA to Fortigate VPN (Properly!)
KB ID 0001721 Problem A while ago I did a run through on site to site VPNs from Cisco ASA to Fortigate firewalls. Back then I said that the default settings were a bit ‘shoddy’ and that I’d revisit it once I had more time. What do you mean shoddy? Well, Cisco and Fortinet are both guilty of enabling ‘Everything’ to make the tunnel come up, so people can just use a wizard and not put to much thought into...
Cisco ASA: Received a DELETE PFKey message from IKE
KB ID 0001720 Problem I was debugging a VPN tunnel today. (From a Fortigate to a Cisco ASAv). I was messing around with the encryption and hashing, when the tunnel fell over. Phase 1 was establishing fine but not Phase 2 (IPSEC). I’ve got better skills on the ASA, so that’s where I was debugging; IPSEC: Received a PFKey message from IKE IPSEC: Parsing PFKey GETSPI message IPSEC: Creating IPsec SA IPSEC: Getting the...
AnyConnect Error: Unable To Verify IP Forwarding Table Modifications
KB ID 0001646 Problem While attempting to connect to a clients AnyConnect, this happened; The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established. Or on older clients, you may see; The VPN client was unable to modify the IP forwarding table. A VPN connection will not be established. Please restart your computer or device, then try again. Solution I was trying to...
Fortigate to Cisco ASA Site to Site VPN
KB ID 0001717 Problem Continuing with my ‘Learn some Fortigate’ theme’. One of the basic requirements of any edge firewall is site to site VPN. As the bulk of my knowledge is Cisco ASA it seems sensible for me to work out how to VPN both those firewalls together, like so; Well that’s the pretty picture, I’m building this EVE-NG so here’s what my workbench topology looks like; Disclaimer (Read First!...
Which Firepower To Replace Your ASA 5500-X?
KB ID 0001705 Problem Well the ASA5516-X was the last one to go end of sale. You may be able to get stock of the remainder of the ASA5500-X series as people clear their shelves, or they may be available as ‘refurb’ stock but they are disappearing. So you would think that the replacements would be better documented? Well it’s sketchy at best, and when you look a the data sheets for the new FPR range the links on...
AnyConnect: ‘Quick and Dirty’ Duo 2FA
KB ID 0001701 Problem Normally if I were deploying Duo 2FA with AnyConnect I’d deploy a Cisco RADIUS VPN on my LAN, (usually on my Duo Authentication Proxy). See the following article; AnyConnect: Enable Duo 2Factor Authentication However, last time I set this up, a colleague said ‘Oh by the way, you don’t need to do that, you can just point the firewall directly at Duo’. I was initially skeptical but I tried...
AnyConnect: Unauthorized Connection Mechanism
KB ID 0001699 Problem I was assisting a colleague to setup some AnyConnect for a client this afternoon, when all of a sudden I was met with this; VPN Logon denied, unauthorised connection mechanism, contact your administrator Solution This was a confusing one, I replicated the problem on my own test firewall. All I had done was change the AAA method from LOCAL to LDAP? It took me a while to figure out what was going on? The reason why...
AnyConnect: Allow ‘Local’ LAN Access
KB ID 0001689 Problem Note: This WONT WORK if you ‘force-tunnel’ or ‘tunnel-all’ remote VPN traffic, (if you are unsure Google ‘what’s my ip’ > Take note of it > Connect to AnyConnect and repeat the procedure, if your public IP address has changed to the IP address of the ASA then you force-tunnel/tunnel-all traffic). With more people remote working now, I’m getting a lot more...