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Reverse DNS lookup - SCO

When I ftp into my OSR 5.06 server, there appears to be a reverse name lookup happening on my local ipaddress. Problem is the name servers at BellSouth don't resolve every IP so there is a delay in connecting. Sendmail times out all together. ftp just hangs for a while. If I reset my router and get another IP it will sometimes resolve. in my syslog here is what I'm seeing. Jul 6 17:42:57 pop named[435]: Lame server on '161.36.19.68.in-addr.arpa' (in ' 19.68.in-addr.arpa'?): [205.152.0.5].53 'NS.BELLSOUTH.net' Jul 6 17:45:17 pop popper[25007]: (v3.0.2-scoR5) Unable to get canonical name o f client 68.19.36.161: ...

  1. #1

    Default Reverse DNS lookup

    When I ftp into my OSR 5.06 server, there appears to be a reverse name
    lookup happening on my local ipaddress. Problem is the name servers at
    BellSouth don't resolve every IP so there is a delay in connecting.
    Sendmail times out all together. ftp just hangs for a while. If I reset
    my router and get another IP it will sometimes resolve.

    in my syslog here is what I'm seeing.

    Jul 6 17:42:57 pop named[435]: Lame server on '161.36.19.68.in-addr.arpa'
    (in '
    19.68.in-addr.arpa'?): [205.152.0.5].53 'NS.BELLSOUTH.net'
    Jul 6 17:45:17 pop popper[25007]: (v3.0.2-scoR5) Unable to get canonical
    name o
    f client 68.19.36.161: Non-Authoritive answer: Host not found, or SERVERFAIL
    (2)
    Jul 6 17:46:16 pop ftpd[24892]: lost connection to 68.19.36.161
    [68.19.36.161]
    Jul 6 17:46:16 pop ftpd[24892]: FTP session closed

    Help appreciated.
    wj








    willjay Guest

  2. #2

    Default Re: Reverse DNS lookup

    willjay wrote (on Sun, Jul 06, 2003 at 05:52:12PM -0400):
    > When I ftp into my OSR 5.06 server, there appears to be a reverse name
    > lookup happening on my local ipaddress. Problem is the name servers at
    > BellSouth don't resolve every IP so there is a delay in connecting.
    > Sendmail times out all together. ftp just hangs for a while. If I reset
    > my router and get another IP it will sometimes resolve.
    >
    > in my syslog here is what I'm seeing.
    >
    > Jul 6 17:42:57 pop named[435]: Lame server on '161.36.19.68.in-addr.arpa'
    > (in '
    > 19.68.in-addr.arpa'?): [205.152.0.5].53 'NS.BELLSOUTH.net'
    > Jul 6 17:45:17 pop popper[25007]: (v3.0.2-scoR5) Unable to get canonical
    > name o
    > f client 68.19.36.161: Non-Authoritive answer: Host not found, or SERVERFAIL
    > (2)
    > Jul 6 17:46:16 pop ftpd[24892]: lost connection to 68.19.36.161
    > [68.19.36.161]
    > Jul 6 17:46:16 pop ftpd[24892]: FTP session closed
    >
    > Help appreciated.
    > wj
    The kludgy fix is to put your name/ip in the SCO server's /etc/hosts. Only good
    until you change IP's, of course.

    NYZ

    --
    _________________________________________
    Nachman Yaakov Ziskind, EA, LLM [email]awacsegps.com[/email]
    Attorney and Counselor-at-Law [url]http://yankel.com[/url]
    Economic Group Pension Services [url]http://egps.com[/url]
    Actuaries and Employee Benefit Consultants
    Nachman Yaakov Ziskind Guest

  3. #3

    Default Re: Reverse DNS lookup

    In article <nb1Oa.15840$z34.14752fe04.atl2.webusenet.com>,
    willjay <willjayexcite.com> wrote:
    >When I ftp into my OSR 5.06 server, there appears to be a
    >reverse name lookup happening on my local ipaddress. Problem is
    >the name servers at BellSouth don't resolve every IP so there is
    >a delay in connecting. Sendmail times out all together. ftp just
    >hangs for a while. If I reset my router and get another IP it
    >will sometimes resolve.
    >in my syslog here is what I'm seeing.
    >Jul 6 17:42:57 pop named[435]: Lame server on '161.36.19.68.in-addr.arpa' (in 19.68.in-addr.arpa'?): [205.152.0.5].53 'NS.BELLSOUTH.net'
    >Jul 6 17:45:17 pop popper[25007]: (v3.0.2-scoR5) Unable to get canonical name of client 68.19.36.161: Non-Authoritive answer: Host not found, or SERVERFAIL (2)
    >Jul 6 17:46:16 pop ftpd[24892]: lost connection to 68.19.36.161 [68.19.36.161] Jul 6 17:46:16 pop ftpd[24892]: FTP session closed
    >Help appreciated.
    Well you are not going to get BellSouth to fix it but with a bit of
    work - not too much if you are handy with a text editor - you can
    make the problem disappear.

    Find out what IP blocks you are coming from that are having
    problems.

    If for example is is the 1.2.3.0 block then add this
    to your /etc/hosts file

    1.2.3.1 bellsouth-dialup
    1.2.3.2 bellsouth-dialup
    1.2.3.3 bellsouth-dialup
    .....
    1.2.3.255 bellsouth-dialup

    And make sure set the system to use hosts before DNS.

    I had to do this on two full blocks from Verio when I was maintaing
    some remote machines. Those did let me in eventually but it would
    take forever.

    Putting in the fake IPs so the system can resolve locally cured it.

    Bill
    --
    Bill Vermillion - bv wjv . com
    Bill Vermillion Guest

  4. #4

    Default Re: Reverse DNS lookup

    "willjay" <willjayexcite.com> wrote in message news:<nb1Oa.15840$z34.14752fe04.atl2.webusenet.co m>...
    > When I ftp into my OSR 5.06 server, there appears to be a reverse name
    > lookup happening on my local ipaddress. Problem is the name servers at
    > BellSouth don't resolve every IP so there is a delay in connecting.
    > Sendmail times out all together. ftp just hangs for a while. If I reset
    > my router and get another IP it will sometimes resolve.
    >
    > in my syslog here is what I'm seeing.
    >
    > Jul 6 17:42:57 pop named[435]: Lame server on '161.36.19.68.in-addr.arpa'
    > (in '
    > 19.68.in-addr.arpa'?): [205.152.0.5].53 'NS.BELLSOUTH.net'
    > Jul 6 17:45:17 pop popper[25007]: (v3.0.2-scoR5) Unable to get canonical
    > name o
    > f client 68.19.36.161: Non-Authoritive answer: Host not found, or SERVERFAIL
    > (2)
    > Jul 6 17:46:16 pop ftpd[24892]: lost connection to 68.19.36.161
    > [68.19.36.161]
    > Jul 6 17:46:16 pop ftpd[24892]: FTP session closed
    >
    > Help appreciated.
    > wj
    Put your IP in etc/hosts on the Unix Server.
    Regards...Dan
    Dan Skinner Guest

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