Source IP address: ?

Every day from IDS, I can see some attacks, such as password_change_failed, failed_login-account_locked_out, failed_login-bad_username_or_password, and stream_DoS.

The source IP address is

What's that supposed to mean? Did someone make his IP address up as

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Hi, isn't a real ip address, it's actually used to represent "any pc/network". If you are getting this kind of address as source might be that for some reason it can't figure out where it's coming from, maybe caused by some kind of error in the network configuration. Also, i think i saw once one firewall that used is used to represent "self tests" and things like that.

Hope this helps.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Dave HoweSoftware and Hardware EngineerCommented:
as warpseh says, its impossible for a tcp connection to come "from" - that's the universal listener, and means "all interfaces/all ip addresses on current host"

your IDS must give a special meaning to that isn't just an ip address - maybe it means it came from a non-ip protocol (such as named pipes) that can't be represented by an address.

what IDS is giving you this log?
howruaz9Author Commented:
IBM Internet Security Systems' (ISS).

Warpseh and DaveHowe, Thanks very much for your information, really appreciate.
howruaz9Author Commented:
Sorry  DaveHowe, I want you and Warpseh share 500 points (250,250). It is my mistake. But I don't know how to correct it.

Administrator, Can you help me out for this issue?  Thanks
howruaz9Author Commented:
Thank you, Warpseh and DaveHowe.  
The reason to have this question reopened was that I have asked to split the points as the information from both of you were very helpful. Sorry about the confusion and hopefully to get your help again when I have questions (for sure there'll be alot).
Thanks again and have a wonderful weekend!
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.