Snort - the de facto standard for intrusion detection/prevention
the de facto standard in IPS  
Got Source? About Snort About Sourcefire Snort FAQ
Sourcefire Network Security - the creators of Snort
Snort News Snort Downloads Snort Rules Snort Docs Snort Training Snort Forums Snort Community Snort Store
Search Site
Search Rules
Account
email
password
not registered?
can't login?
user preferences
next up previous contents
Next: Config Up: Variables Previous: Variable Modifiers   Contents

Limitations

When embedding variables, types can not be mixed. For instance, port variables can be defined in terms of other port variables, but old-style variables (with the 'var' keyword) can not be embedded inside a 'portvar'.

Valid embedded variable: 

        portvar pvar1 80
        portvar pvar2 [$pvar1,90]

Invalid embedded variable: 

        var pvar1 80
        portvar pvar2 [$pvar,90]

Likewise, variables can not be redefined if they were previously defined as a different type. They should be renamed instead:

Invalid redefinition: 

        var pvar 80
        portvar pvar 90


Steven Sturges 2008-04-01
site feedback | Terms of Use | Privacy Policy | forum archives ©2008 Snort and Sourcefire are registered trademarks of Sourcefire, Inc. All rights reserved.