Firmware Update Fortigate 80E

[jarry]

 I recently did a firmware upgrade on our 80E firewall. After the firmware upgrade I have no internet access, I cannot get out of WAN 1 or WAN 2. As a test we used the DMZ port and we were able to get to the internet from that port. I know the internet connection from our telco company is good. If I connect it to our old firewall it works fine. I have also rebooted our modem and talked to our ISP provided and they can see the link and report no issues. I have talked to several fortigate support techs and each ones tells me something different or tries different solutions with no luck.

I downgraded to the previous firmware upgrade or at least the last one that was working and still same issues. I was thinking about a complete restore to factory defaults but was wondering if there is a best practice way of doing this. 

Thank you

[SankaraNarayanan_S]

The factory reset KB article are provided below hence it is same across fortinet Firewall Devices

For fortinet factory reset using CLI you can follow up the procedure as per KB article provided below .

https://kb.fortinet.com/k...ternalID=FD37052 

https://docs.fortinet.com...ce/410718/factoryreset

The Hardware reset using the back panel button  provided below along fortinet KB Article  .

https://kb.fortinet.com/k....do?externalId=FD33883

Note : Before Factory reset keep a tftp server and copy of the new firmware if suggested from support as part of the back out plan , the KB article provided below

https://docs.fortinet.com/document/fortigate/6.2.0/cookbook/702257/configuration-backups

Also please share more information on the firmware upgrade path followed for fortinet 80E.