Block Domain on NGFW

[RyanJohnstone]

Hello,

can you anyone let me know how i block access based on domain name, e.g. i want a rule to allow all SMTP inbound except from domain testblock.com, how do i do this?

Thanks

Ryan

[Mick_Ball]

you will need 2 rules, one to allow all SMTP but just before that you need a rule to block SMTP from testblock.com.

[RyanJohnstone]

Hi, thanks for response.

the query i guess was more around how do i referenc the testblock.com domain in a rule?  as its not Web traffic i assume i cannot use URL Category etc, so how can i block a whole domain based on domain name, not IP, would need to PA to do some DNS work somehow. 

[aaobuhov · Accepted solution]

You can try to use FQDN name (Object -> Addresses - Add type FQDN).  And use this object as source/destination.

[BPry · Accepted solution]

@aaobuhov,

I don't ever recommend using an FQDN object when you're talking about SMTP traffic. If this domain was hosted on Microsoft for example you could end up blocking way more traffic then you intend. 

[RyanJohnstone]

thanks, i did not think of looking on the drop down, this was what i was after so thanks again.

[RyanJohnstone]

That is a very good point, thank you for your response, i will have to re-think this one!