Hi Kings,

That helps, although still confused.  For example:

pixfirewall(config)# test regex 0xe311 xe3
INFO: Regular expression match succeeded.
pixfirewall(config)#
so it seems my text is now matching only part of my regex?

ideas, I am learning this but I am still missing something!

JT



On Thu, May 5, 2011 at 1:02 AM, Kingsley Charles <[email protected]
> wrote:

> "\" to removes the special meaning of "x".
>
>
> Snippet from
> http://www.cisco.com/en/US/docs/security/ips/6.2/command/reference/crIntro.html
>
> Regular Expression Syntax
>
> Regular expressions are text patterns that are used for string matching.
> Regular expressions contain a mix of plain text and special characters to
> indicate what kind of matching to do. For example, if you are looking for a
> numeric digit, the regular expression to search for is "[0-9]". The brackets
> indicate that the character being compared should match any one of the
> characters enclosed within the bracket. The dash (-) between 0 and 9
> indicates that it is a range from 0 to 9. Therefore, this regular expression
> will match any character from 0 to 9, that is, any digit.
>
> To search for a specific special character, you must use a backslash before
> the special character. For example, the single character regular expression
> "\*" matches a single asterisk.
>
> The regular expressions defined in this section are similar to a subset of
> the POSIX Extended Regular Expression definitions. In particular, "[..]",
> "[==]", and "[::]" expressions are not supported. Also, escaped
> expressions representing single characters are supported. A character can be
> represented as its hexadecimal value, for example, \x61 equals `a,' so \x61
> is an escaped expression representing the character `a.'
>
>
>
> With regards
> Kings
>
>   On Thu, May 5, 2011 at 8:43 AM, Jim Terry <[email protected]> wrote:
>
>>   Hi all,
>>
>> I am trying to figure out regex and I want to test my input on the PIX.
>> so I did this and I expected it to match- but it did not:
>>
>> pixfirewall(config)# test regex 0x06 \x06
>> INFO: Regular expression match failed.
>>
>> Can someone tell me why 0x06 and \x06 are not the same?
>>
>> Thanks,
>>
>> JT
>>
>>
>>
>>
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>
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