Automatic update IPS
I set up automatic update of the IPS-SSM-20 on Cisco.com and I have a question about the functioning of updates. Updates are related to the engine and the Signature only, is that correct?
In the case where a new signature is posted on Cisco.com is the automatic update did the update of signature only?
What engine SW in this case is simply ignored.
OK, only the updates of the Signature and engine updates will be automatically downloaded from cisco.com.
This is because the two types of updates can be applied to sensors without a reboot running.
If an Inline sensor is configured for automatic ByPass, then the traffic will continue to flow through the sensor without supervision while the update takes place.
Updates major, minor updates, Service Packs, and hotfixes are NOT automatically kept up-to-date of cisco.com.
These updates require a restart for installation and will cause traffic to stop for a short period when applied. They should be applied for regular network time.
(NOTE: you can configure your own server ftp/scp.) Manually download these updates and place on your server. Next, configure your sensors to check your own ftp/scp server for these types of updates. The automatic updates cisco.com and automatic updates of your own server can be configured on the same sensor.)
Engine updates are released only a few times a year, while the signature updates are published several times a month (even several times a week, or even several per day during).
The sensor connects to cisco.com and queries the server for the names of the latest engine and Signature updates.
Then, it checks to see if these updates are newer than what is currently on the sensor.
Is there is a new update of motor (higher level of E), and then it downloads and installs the new version of engine.
If the update of motor on cisco.com is at the same level of E which is already on the sensor, then it checks the level of the last update of the Signature S.
If the level of the most recent update of Signature S is higher than what is on the sensor, and then downloads and installs the new Signature Update.
If level E and S of the sensor are the same that the most recent engine update and update of the Signature, the sensor is up to date. None of the files are downloaded, and the sensor waits just until next time of automatic update regular repeat the process.
Tags: Cisco Security
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