Penetration Testing mailing list archives
Re: DNS ACL ?
From: jnemeth () victoria tc ca (John Nemeth)
Date: Sat, 12 Nov 2005 13:09:43 -0800
On Apr 3, 3:10am, John Hally wrote: } } I need a sanity check regarding DNS ACLs. For external facing DNS servers } you need to allow only udp/53 inbound, correct? I know tcp/53 is used for No. } zone transfers and requests/replies greater than a certain size, but they } shouldn't typically happen for general dns queries correct? Depends on the size of the query. Which in turn depends on how your DNS is setup (i.e. do you have hosts with a large number of A records, do you have a number of MX records {queries for these usually return the A records as 'Additional Info'}, or have AAAA records?). Also, don't forget about your secondaries if they happen to be offsite. }-- End of excerpt from John Hally ------------------------------------------------------------------------------ Audit your website security with Acunetix Web Vulnerability Scanner: Hackers are concentrating their efforts on attacking applications on your website. Up to 75% of cyber attacks are launched on shopping carts, forms, login pages, dynamic content etc. Firewalls, SSL and locked-down servers are futile against web application hacking. Check your website for vulnerabilities to SQL injection, Cross site scripting and other web attacks before hackers do! Download Trial at: http://www.securityfocus.com/sponsor/pen-test_050831 -------------------------------------------------------------------------------
Current thread:
- DNS ACL ? John Hally (Nov 11)
- Re: DNS ACL ? Stephen J. Smoogen (Nov 13)
- RE: DNS ACL ? Jason Muskat (Nov 13)
- RE: DNS ACL ? Giancarlo Paolillo (Nov 13)
- Re: DNS ACL ? Thor (Hammer of God) (Nov 13)
- Re: DNS ACL ? Richard C Lewis (Nov 13)
- Re: DNS ACL ? Chris Brenton (Nov 13)
- Re: DNS ACL ? Lynx (Nov 13)
- Re: DNS ACL ? Justin Ferguson (Nov 14)
- <Possible follow-ups>
- Re: DNS ACL ? John Nemeth (Nov 13)
- RE: DNS ACL ? Maher Odeh (Nov 13)
- FW: DNS ACL ? Dario Ciccarone (dciccaro) (Nov 21)
- RE: DNS ACL ? Kyle Quest (Nov 22)
- RE: DNS ACL ? Dario Ciccarone (dciccaro) (Nov 24)
- RE: DNS ACL ? Dario Ciccarone (dciccaro) (Nov 24)
- RE: DNS ACL ? John Hally (Nov 26)