Questions about IDS 4.0 and 4.0 VEI

I played with IDS/IDM/VEI 4.0 and so far, I am really impressed with the upgrade!

A few questions/suggestions:

(1) with IDM, to detect the signature configuration, is there a quick way to edit a particular number of signature? For example I mean tune signature 3041 - the only way I can find to do if I don't know the category is to collect all the signatures, then try to guess which page it's. I think that the previous version had a pop-up that listed the range of signatures on each page.

(2) a Suggestion: in VEI, looking at a view, the first column is a group, and the second column contains the number of elements contained in this group. However, a double click on the first column does not give detail, only double clicking on column 2. It would be nice if the first column is also. (For example, for the severity level group, it would be nice to double-click on the word 'High' to see all the signatures of high status.)

(3) is there a simple way to VEI or IDM to see connections have been blocked? It would be nice to have a summary paper when connections have been blocked and which IP addresses have been affected. It would also be groovy if it was shown in the VEI in the individual events (IE. Add a column 'Action' showing what decisions have been taken, as appropriate for each shot of signature)

(4) is it possible to export the settings I changed default value? So far I've just kept a Notepad file that lists the signatures I've set in case I have to re - install. (And from the looks of it, upgrade to the latest signatures wiped out my block settings)

(5) what is the difference between ShunHost & ShunConnection? The documentation does not really. And it is designed to work with IOS vs Pix fleeing?

(6) the Docs for IDM imply that system variables can be used in the event filters, but when I try to apply the system IN variable for a filter, it won't let me so I have to type in logical addresses.

That's all for now!

I am pleased to hear that you like the new versions. My answers to some of these questions/comments I hope to improve your experience.

(1) with IDM, to detect the signature configuration, is there a quick way to edit a particular number of signature? For example I mean tune signature 3041 - the only way I can find to do if I don't know the category is to collect all the signatures, then try to guess which page it's. I think that the previous version had a pop-up that listed the range of signatures on each page.

ANSWER: not at the moment. We have heard this feature of multiple users request. A future version 4.0 is already planned to bring back the feature 3.1 (announcement of the signature by page range). Cannot comment on when this version will be released.

An alternative until then would be to select the option to view all transmissions on the page (it will take a while to load), then use the search button in your browser to take you to the line for the signature.

(2) a Suggestion: in VEI, looking at a view, the first column is a group, and the second column contains the number of elements contained in this group. However, a double click on the first column does not give detail, only double clicking on column 2. It would be nice if the first column is also. (For example, for the severity level group, it would be nice to double-click on the word 'High' to see all the signatures of high status.)

ANSWER: I'll pass it on the developers.

(3) is there a simple way to VEI or IDM to see connections have been blocked? It would be nice to have a summary paper when connections have been blocked and which IP addresses have been affected. It would also be groovy if it was shown in the VEI in the individual events (IE. Add a column 'Action' showing what decisions have been taken, as appropriate for each shot of signature)

ANSWER: IDM manual locking tab will provide you with the current block list as allow you to add blocks or remove existing blocks.

It's called 'Manual blocking' but it will also show you the current 'automatic blocking' (you may switch to another screen IDM, and then return to be refreshed with the latest red list)

http://www.Cisco.com/univercd/CC/TD/doc/product/iaabu/csids/csids9/idmiev/swchap5.htm#195940

Also, you can run the line "view events" to show you what the blocks have been tried. If I remember correctly, the events to see the line you would be: "view the events of the NAC" where the time and date is the entrance earlier you want to display. (NOTE: NAC = Network Access Controller - replacement for managed in the new sensor V4.0).

I recommend playing with the different possibilities to show events to see the different information that the sensor can bring in the new CLI.

In addition, the attempted action is now included in the alarm itself and IEV should have a column IPLOG, SHUN and TCP Reset show what action was attempted. You check the settings, and then make sure that you have these selected columns is displayed in your view. (The actions attempts are visible when looking at individual alarms and not all summary windows)

(4) is it possible to export the settings I changed default value? So far I've just kept a Notepad file that lists the signatures I've set in case I have to re - install. (And from the looks of it, upgrade to the latest signatures wiped out my block settings)

CLI the commmands to check:

more current-config - gives a style CLI listing the configuraiton, under the area of virtualSensor, it shows you just changes to the signatures rather than see the definition of default full signature.

Copy current-config config backup - backups your current config in a storage space on the sensor itself

Copy current-config - allows you to save your configuration to the location. The location could be an ftp server, or scp.

Example:

copy @10.1.1.1/config-backups/sensor1-config ftp://usercurrent config

(5) what is the difference between ShunHost & ShunConnection? The documentation does not really. And it is designed to work with IOS vs Pix fleeing?

Shun host creates the following ACL entry:

refuse any ip

SO it blocks all packets from the source.

Shun connection on the otherhand creates the following ACL entry

(NOTE: I am doing this out of memory so I'm not entirely because of my response below, you may need to test to know for sure):

refuse eq

SO it blocks only the packets from the source to the ip of the victim who go to the same port where the attack occurred.

NOTE: Multiple connections to the same srcip Shun may cause the glines being combined into a single host Shun to prevent that IP to fill your ACL list.

Regarding IOS vs PIX. The above commands are for IOS. Similar entries can be seen with the command "run away" from the Pix, but no matter what you enter with the command "run away" from the Pix, he will always shun the entire source ip address. So if you Shun connections with a Pix command "escape" has other information, but the Pix will always shun the sourceip together.

(6) the Docs for IDM imply that system variables can be used in the event filters, but when I try to apply the system IN variable for a filter, it won't let me so I have to type in logical addresses.

Looks like maybe it's a bug.

Tags: Cisco Security

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