RE: [SA-list] Dependencies

[Ahmed Hassan]

This is what I actually meant/want to do;

List:

A

B

C

D

E

 

    Dependencies

        C, D and E depends on A & B being UP

       

    Result

    If A & B are Down THEN do not check C, D & E - Just alarm A & B are DOWN

      If A is UP & B is Down THEN check C, D & E - Just alarm B is DOWN

         If B is UP and A  is Down THEN check C, D, & E - Just alarm A is DOWN

   

 Dirk Bulinckx <[EMAIL PROTECTED]> wrote:

Your mail isn't clear.

How are the dependencies set?  Like in 2 or in 3A or in 3B?

 

 

An entry can depend on the status of one other entry.

   

example

    List of entries:

            A       

            B

    Dependency's:

        B depends on A being UP

 

    Result:

    IF A is UP then B is checked

    IF A is not up thne B is unavailable.

 

 

 

Example 2:

    List:

        A

        B

        C

 

    Dependency's

        C depends on B being UP

        B depends on A being UP

 

    Result

    If A is UP B will be checked

    if B is UP C will be checked too

    If A is not UP then B won't be checked and flagged as unavailable, and C too.

    If A is UP and B is not UP, then C won't be checked and flagged as unavailable.

 

 

 

Example 3:

    List

        A

        B

        C

Dependency's   

 

        C depends on B being UP

        C depends on A being UP

=> NOT POSSIBLE!

 

 

 

       

 

 

 

dirk.

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Ahmed Hassan
Sent: Tue Dec 17 12:55 PM
To: [EMAIL PROTECTED]
Subject: RE: [SA-list] Dependencies

Thanks Dirk - My enteries are in the following order;

1 - Host entries

FW_1 Check
FW_1-Dummy Check
FW_2 check
DMZ_host1 check
DMZ_host2 check
DMZ_host3 check
DMZ_host4 check
   
2- Dependencies
DMZ_host1 depends on FW_2 being UP
DMZ_host2 depends on FW_2 being UP
DMZ_host3 depends on FW_2 being UP
DMZ_host4 depends on FW_2 being UP
FW_2 depends on FW_1 being UP

3 - Check DMZ_hosts if FW_2 is down and FW_1 is up
A
DMZ_host1 depends on FW_1 being UP
DMZ_host2 depends on FW_1 being UP
DMZ_host3 depends on FW_1 being UP
DMZ_host4 depends on FW_1 being UP

B
DMZ_hosts1 depends on FW_2 being UP
DMZ_hosts2 depends on FW_2 being UP
DMZ_hosts3 depends on FW_2 being UP
DMZ_hosts4 depends on FW_2 being UP

BUT when I try to enter the dependecies for Section 3A [above] then it reverts to the entries in Section 3B. For example, when I enter;

DMZ_host1 depends on FW_1 being UP

THEN it changes the dependency to;
DMZ_hosts1 depends on FW_2 being UP

As a result, when the status of FW_2 check is DOWN then the statuses of all the DMZ_hosts show as UNAVAILABLE.

 Dirk Bulinckx <[EMAIL PROTECTED]> wrote:

You select the entry you want to duplicate and press CTRL-D, this will open the ADD/EDIT host screen, with a duplicate of the entry you originaly selected.  Click OK and you have 2 entries that are exactly the same.  (Maybe it would be clearer to change the pretty-name of one of them to make sure you understand later why you made 2 identical entries).

 

 

 

dirk.

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Ahmed Hassan
Sent: Mon Dec 16 10:58 PM
To: [EMAIL PROTECTED]
Subject: RE: [SA-list] Dependencies

>I assume you have some checks for the FWs too?

Yes I do have a ping test for the FWs too.

 

>For the additional test you want to have you'll need one FW dummy entry.

How do I create the FW dummy entry?

 

>BUT if you still want to check DMZ_hosts if FW_2 is down and FW_1 is up THEN you will have to duplicate

 

Yes - I will also like to check DMZ_hosts if FW_2 is down & FW_1 is up. But how do I create the duplicate.

 

Sorry for being a "pain".

 

Thanks

 

 Dirk Bulinckx <[EMAIL PROTECTED]> wrote:

I assume you have some checks for the FWs too?

For the additional test you want to have you'll need one FW dummy entry.

 

 

        FW_1    check

        FW_2    check

        DMZ_hosts check

 

   

 

    DMZ_hosts depends on FW_2 being UP

    FW_2 depends on FW_1 being UP

 

BUT if you still want to check DMZ_hosts if FW_2 is down and FW_1 is up THEN you will have to duplicate it to get

 

 

    DMZ_hosts depends on FW_2 being UP

    FW_2 depends on FW_1 being UP

 

 

    DMZ_hosts depends on FW_1 being UP

    DMZ_hosts depends on FW_2 being UP

 

 

And you could get some additional alerts...but not all will be duplicated.

 

 

dirk.

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Ahmed Hassan
Sent: Mon Dec 16 5:16 PM
To: [EMAIL PROTECTED]
Subject: [SA-list] Dependencies

I have 2 firewalls and was wondering how I would be able to make my servers on the DMZ depend on the 2 firewalls being available. Thus the availability of the servers on the DMZ depends on firewalls x and y being up.

I have a situation when both firewalls goes down - I receive alerts informing me of the firewalls being down and also the various servers on the DMZ as well.

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