Berkeley CSUA MOTD:Entry 16485
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2025/04/03 [General] UID:1000 Activity:popular
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1999/9/9-10 [Academia/Berkeley/CSUA/Motd, Computer/Networking] UID:16485 Activity:kinda low
9/8     How do reverse name lookups work. CSUA has the IP addess
        128.32.43.52. So the <DEAD>ns1.berkeley.edu<DEAD> servers have an entry like
        52.43.32.128.IN-ADDR.ARPA IN PTR http://soda.CSUA.Berkeley.EDU
        but if I'm doing a revers lookup from say MIT how would it pull
        out that resource record from the Berkeley nameserver?
        (As in, how would it know to look at Berkeley's name server)
        \_ Same way it does for http://berkeley.edu - it asks the root nameservers
           "Who should I ask for info about the 32.128.IN-ADDR.ARPA domain?"
           and they return the list of nameservers it's delegated to.
           \_ But that's assuming that you're using strictly class A, B,
              or C addresses.  Many sites are classless (CIDR).
                \_ Still works basically the same.  Start at the top and
                        ask your way down the list.  Read the OReilley
                        BIND book if you want to know the details, since
                        there are far too many to discuss in the motd.
                \_ Unfortunately, BIND still is pretty much classful in
                   in-addr delegation.  It can only delegate on octet
                   boundaries.
             \_ 32.128.IN-ADDR.ARPA is just another domain, and can have
                CNAMES in it as well.  use your imagination.
                                                \_ ooh la-la!
2025/04/03 [General] UID:1000 Activity:popular
4/3     

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soda.CSUA.Berkeley.EDU -> soda.csua.berkeley.edu/
Computer Science Undergraduate Association The Computer Science Undergraduate Association is dedicated to representing the undergraduate Computer Science student body and associates to the University of California at Berkeley , its representatives, and other related organizations; Announcements: Are you a current Berkeley undergrad interested in EE or CS? Every spring, student groups give a presentation to the EECS faculty on pressing issues in the EECS program. Please fill out this quick survey to make sure your opinions are heard. CSUA t-shirts are now available in the office 343 Soda for $12 each. The CSUA Mentoring Program is calling for new students to sign up to be mentored. Register to find out more information about this free program at the mentoring website . Members interested in mentoring should contact jhs as soon as possible. CSUA Officer Meetings: Politburo meetings for Spring 2004 are scheduled for every Monday at 6pm in 337 Soda Hall.
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