All incoming TCP connections blocked for 5 minutes at random times.

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All incoming TCP connections blocked for 5 minutes at random times.

L2 Linker

At random times all TCP connections from the Internet are blocked (all ports and all IPs) for incoming traffic only.  Websites, mail servers etc are not accessible from the Internet.  UDP and ICMP are not affected.  What could be causing this?

21 REPLIES 21


@sharam wrote:

What I am seeing in logs related to the outage is:

 

sharam_0-1594047748081.png

But I am not able to see which rulebase this it related to.


You're showing the detailed log entry.  (You've clicked the magnifying glass next to an entry in the threat log)  To better help point out why this is happening we need to see the main entry.  It looks like this is happening because of a VP profile which is attached to a security policy rule.

 

threat.PNG

L4 Transporter

zone protection

Thank you for your response @Brandon_Wertz .  This is the main entry of an event that just happened today:

sharam_0-1594061476300.png

 

Can you please be more specific?  Zone Pro is the first place we looked and changed various config to no effect.

Did you look under Objects -> Security Profiles -> Dos Protection?   Th default block duration is 5 minutes..

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