Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
I know this is an old post, but I think I might know why your program in saying 'yes' all the time.

The reason it might be always reporting that the server is up might be that if it is a linux box, iptables might have icmp host unreachable turned off. If that's the case then when your send call is done, it returns without error and in the gap between the nth and the (n+1)th send call, the OS reports an ICMP host unreachable, but due to the iptables rule, it gets dropped at the point of entry, never making it to the program. So your subsequent sends do not see any errors reported by the previous ones and it looks as if all is well.


In reply to Re^3: Net::Ping the mini series (UDP Pings) by saurabh.hirani
in thread Net::Ping, the mini series by tye

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others avoiding work at the Monastery: (6)
    As of 2014-10-01 22:04 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      What is your favourite meta-syntactic variable name?














      Results (40 votes), past polls