Tag Archives: Fortiauthenticator

Fortiauthenticator – SMS only remote sync rule

I had an issue, well more of a specific formatting issue with Fortiauthenticator that I thought I would share. I have a client who is only use SMS with forticlient via fortiauth. The idea is that the user connects and authenticates to the SSL VPN, and then hits Fortiauth for token code that was sent to the client VIA SMS.

When using SMS with tokens, you have to have the users mobile number entered so it can send to them. Hard coding the users mobile number worked great, but for some reason I could not get the remote sync rule to pull in the mobile phone number. Below are the steps I used to fix this.

First in the remote sync rule under “LDAP User Mapping Attributes” modify the mobile data field with “mobile” all lower case.

Then make sure that in Active Directory the mobile number is entered under the users profile. the Auth says it wants the mobile phone number in a very specific format – +[international_number] – this threw me for a while. In the end the number in AD wasn’t the problem it was the mapping attribute. Below is how to inset the number into AD. Notice the number has +[country code]number. Thats it, after putting that in the remote sync rule worked fine.

Fortiauthenticator: Troubleshooting with tcpdump

Had a strange issue the other day with a FAC, where it would not send emails to users with their assigned tokens, but would send emails just fine any other time. I wanted to capture all outgoing traffic to see if SMTP messages were really being sent.

Fortiauth has Tcpdump built in, and is very easy to run.

First SSH into the FAC, from there you have some execute options. Below shows the tcpdump options:

exe tcpdump?
tcpdump Examine local network traffic.
tcpdumpfile Same as tcpdump, but write output to a file downloadable via GUI.
exe tcpdump

If you run ‘exe tcpdump’ it will spit all the traffic to the screen, but if you run ‘exe tcpdumpfile’ it will log the output to a .pcap that is downloadable from the GUI. This gives you the option to open it in Wireshark and analyze.

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To download the .pcap open your Fortiauth append /debug to the web address for example: https://10.110.2.60/debug. From here you will be prompted with what you want to debug, and at the bottom is the option to open the “CLI Packet Capture” this gives you the option to download the pcap.

nac-2

Thats it! Thank you Fortinet.