[nsp] regexp question

[Peter L]

Hi
Thanks, but I get more than the two wanted e.g 1234 345 466 etc. I'm gonna
give back reference a try and we'll see how it works.. ;-)
Regards,
Peter
----- Original Message ----- 
From: "rasmus (posts)" <lom at doruk.net.tr>
To: "'Peter L'" <pel at scint.org>; <cisco-nsp at puck.nether.net>
Sent: Tuesday, April 06, 2004 4:38 PM
Subject: RE: [nsp] regexp question


> Hi Peter,
>
> This should work fine,
>
> ^(1234_)+([0-9]+_)+$
>
> Explanation
>
> ^(1234_)+    # this accepts 1234 AS with any prependings
> ([0-9]+_)+$  # this accepts any ASNs with any prependings also,
>
>
> Please tell the result after a try,
>
> Good luck
>
> Regards,
>
> Levent Ogut
>
> > -----Original Message-----
> > From: cisco-nsp-bounces at puck.nether.net
> > [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Peter L
> > Sent: Tuesday, April 06, 2004 1:05 PM
> > To: cisco-nsp at puck.nether.net
> > Subject: [nsp] regexp question
> >
> > Hi
> > I have a question regarding a regular expression I'm trying
> > to fix and hopefully someone that's excellent at regular
> > expressions can help me. I would like to accept everything
> > from a peer + everyting from the ASs his peering with
> > directly. Example:
> > Accept:
> > 1234 1234
> > 1234 567
> > 1234 1234 655
> > 1234 654 654
> > Deny:
> > 1234 654 989
> > or
> > 1234 567 567 2323
> > ando so forth..
> > So far I have:
> > ^(1234_)+([0-9]+)*$
> > This accepts everthing except when the second AS is
> > prepended(1234 654 654).
> > Is i possible to fix this in one expression? Otherwise I have
> > to setup filters for every AS and that would not be very dynamic.
> >
> > Thank you
> > Peter
> >
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> >
>