Okay, then... Can you try this?

$ strace -o 698729.out -econnect,sendto,recvfrom perl 698729.pl

[download]

The 698729.out file should start with something similar to this:

connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = -1
+ ENOENT (No such file or directory)
connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = -1
+ ENOENT (No such file or directory)
connect(3, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr(
+"192.168.1.1")}, 28) = 0
sendto(3, "\321\263\1\0\0\1\0\0\0\0\0\0\2my\5yahoo\3com\0\0\1\0\1"...,
+ 30, MSG_NOSIGNAL, NULL, 0) = 30
recvfrom(3, "\321\263\201\200\0\1\0\2\0\0\0\0\2my\5yahoo\3com\0\0\1"..
+., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_add
+r("192.168.1.1")}, [16]) = 80
connect(3, {sa_family=AF_INET, sin_port=htons(80), sin_addr=inet_addr(
+"216.252.123.25")}, 16) = -1 EINPROGRESS (Operation now in progress)
connect(3, {sa_family=AF_INET, sin_port=htons(80), sin_addr=inet_addr(
+"216.252.123.25")}, 16) = 0
...

[download]

Note that 192.168.1.1 is my DNS nameserver and I don't have nscd running, so the fist ENOENT errors can be ignored. You can see that the DNS query got through since 216.252.123.25 is the IP address for my.yahoo.com and there's a connection to port 80 going on.

Hope that helps.

Update: renamed lwp-useragent.pl to OP's node ID, so it's clear where does the code come from.

In reply to Re^3: LWP::UserAgent always complains about Hostname by alexm
in thread LWP::UserAgent always complains about Hostname by Herkum

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.