Link to home
Start Free TrialLog in
Avatar of Hemil Aquino
Hemil AquinoFlag for United States of America

asked on

ASA Question?

Howdy folks,

I have a question in regards the ASA 5505. I totally understand the concept from higher to lower level, but I noticed something interesting while I was doing something at work today. Traffic from my inside could see my web server located in my DMZ via local IP address. For example source local IP (MyPC 192.168.1.50) was able to establish tcp session towards my Apache server addressed to 192.168.50.50.  I thought once you've created level of security none of them interface should communicate unless you have an access-rule such as NAT or ACCESS-LIST in placed. Please let me know if im wrong.

 Also, I have no routing nor access-list, just basic simple configuration, I just noticed it after mistakenly typed an IP address.

INSIDE 100
OUTSIDE 0
DMZ 50

Thanks you!
Avatar of Soulja
Soulja
Flag of United States of America image

By default higher level can communicate to lower security level. Once you place an ACL then that rule goes out the window. So above. INSIDE can talk to OUTSIDE and DMZ. Lower Level can't talk to higher level by default.
Avatar of Hemil Aquino

ASKER

Hi Soulja,

Thank you for your reply, so it is normal that my INSIDE network can communicate with the port 80 DMZ cause higher to lower?
Other than that I cannot ping nor do anything which is fine.

My question to you is, by default does ASA send traffic from a higher level towards DMZ opening a tcp communication to connect to web server port 80?

Thank you!
ASKER CERTIFIED SOLUTION
Avatar of Soulja
Soulja
Flag of United States of America image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial