I am currently under a DDOS DNS attack. It is not clear if I am the victim or an unwilling participant in an attempt to DDOS someone else.
In any event, a query is sent to our DNS server looking for the "root". The DNS server has been configured to ignore the request other wise it would reply with the list of root servers.
I would like to configure our Cisco ASA to block the request at the firewall before it ever reaches the DNS server.
I would like to inspect DNS and check the "Domain Name" field for the root or "." However I can't seem to figure out how to create the Regex that would match when the query just contains the period character.
Interestingly, the $ doesn't appear in the list of special characters for this flavour of regular expressions (I was just hoping it would work anyway) - generally it is used to match the end of the line.
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I recently updated from an old PIX platform to the new ASA platform. While upgrading, I was tremendously confused about how the VPN and AnyConnect licensing works. It turns out that the ASA has 3 different VPN licensing schemes.
I found an issue or “bug” in the SonicOS platform (the firmware controlling SonicWALL security appliances) that has to do with renaming Default Service Objects, which then causes a portion of the system to become uncontrollable and unstable.
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