Cisco device serial number explanation

Cisco devices have a standard serial number, from the serial number you can work out it's age and the location it was built. To decipher the serial number, here's how it is composed. Cisco S/N format is LLLYYWWXXXX. LLL = Location code (i.e. FOC = FoxConn China) YY = Year code (08 = 2004...09=2005...etc...) WW … Continue reading Cisco device serial number explanation

Fortigate: Disable Telemetry (Endpoint Security) for Client VPN Users

blah blah Solution 1 You can recreate the VPN and on Step 3, Unselect Allow Endpoint Registration Solution 2 Disable Endpoint Security Enable the feature first so the option will show up on the firewall. Under System -> Feature Select -> Security Features -> select Endpoint Control. Once Feature is enabled, Forticlient Profile will be … Continue reading Fortigate: Disable Telemetry (Endpoint Security) for Client VPN Users

Fortigate: New FortiOS Upgrade Path Tool

Early this week, Fortigate has removed the Upgrade Path table on the Fortigate Cookbook website gaining reaction from many of us. I spend a good number of minutes trying to look around where I can find the table I used to find in just a couple of google searches and clicks. The Upgrade Path tool … Continue reading Fortigate: New FortiOS Upgrade Path Tool

Sonicwall GVC VPN: Unable to connect to VPN. Error: “Packet length mismatch with interface MTU”

I had a client who was unable to connect to the Sonicwall VPN via GVC (Global VPN Client). Packet capture showed initial inbound traffic to the Sonicwall from Client is being dropped. Logs as below: 50 03/30/2016 14:16:06.912 X4*(i) -- VPN.CLIENT.IP.HERE SONICWALL.WAN.IP.HERE IP UDP 500,500 DROPPED 60[60] 51 03/30/2016 14:16:06.912 X4*(i) -- VPN.CLIENT.IP.HERE SONICWALL.WAN.IP.HERE IP … Continue reading Sonicwall GVC VPN: Unable to connect to VPN. Error: “Packet length mismatch with interface MTU”

Fortigate: Log Monitoring and Email Alerting via Fortianalyzer

Using the logs sent by your Fortigate Firewall to your Fortianalyzer, you can set up an monitoring/alerting function for any logs or events captured. This is very helpful in monitoring critical systems and functions such as interface flaps or VPN IPsec Issues. You can monitor any events as long as it is logged.  In this … Continue reading Fortigate: Log Monitoring and Email Alerting via Fortianalyzer

Fortigate: Disabling and enabling the SIP session helper

You can use the following steps to disable the SIP session helper. You might want to disable the SIP session helper if you don’t want the FortiGate to apply NAT or other SIP session help features to SIP traffic. With the SIP session helper disabled, the FortiGate can still accept SIP sessions if they are … Continue reading Fortigate: Disabling and enabling the SIP session helper

Sonicwall Global VPN Client: Sonicwall GVC unable to connect through certain ISPs

In some cases, Sonicwall GVC is unable to connect to select ISPs/Networks, where it is proven working elsewhere (3G Tethering or other ISPs). Usual troubleshooting and things to look at is if VPN IPSec Passthrough is enabled on the home modem or router. There is another troubleshooting step that is worth trying, which is to … Continue reading Sonicwall Global VPN Client: Sonicwall GVC unable to connect through certain ISPs

Cisco: Password Recovery and Factory Reset of Cisco Catalyst 2960/2900-series

Password Recovery Procedure Not surprisingly, the instructions for Cisco Password Recovery Procedure are found readily on the internet via any search engine. On this page, one merely needs to scroll down to the particular product series and click the respective link. We are interesting in the documentation for Password Recovery of the Cisco Catalyst Layer 2 fixed configuration … Continue reading Cisco: Password Recovery and Factory Reset of Cisco Catalyst 2960/2900-series

Tricks: Introducing Cisco RF Planning Tool

Here is a useful planning tool in Wireless Network provisioning for Cisco Meraki AP or the Mobility Express models. This is an online tool called Cisco RF Wi-Fi Planner Tool. Check out https://rftool.cisco.com You can use this by logging in to your Cisco Account. You can put into account external factors in designing your wireless network … Continue reading Tricks: Introducing Cisco RF Planning Tool