11-06-2018
ping uses the ICMP protocol. It uses no ports. It does not need tcp or ssh.
ping can be blocked, but you gave us no system information.
See this for how ping can be blocked -
How to Block Ping ICMP Requests to Linux Systems
Good, complete questions get better answers - we need the UNIX OS and version to give specific help.
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LEARN ABOUT DEBIAN
anyevent::xmpp::ext::ping
AnyEvent::XMPP::Ext::Ping(3pm) User Contributed Perl Documentation AnyEvent::XMPP::Ext::Ping(3pm)
NAME
AnyEvent::XMPP::Ext::Ping - Implementation of XMPP Ping XEP-0199
SYNOPSIS
use AnyEvent::XMPP::Ext::Ping;
my $con = AnyEvent::XMPP::IM::Connection->new (...);
$con->add_extension (my $ping = AnyEvent::XMPP::Ext::Ping->new);
# this enables auto-timeout of a connection if it didn't answer
# within 120 seconds to a ping with a reply
$ping->enable_timeout ($con, 120);
my $cl = AnyEvent::XMPP::Client->new (...);
$cl->add_extension (my $ping = AnyEvent::XMPP::Ext::Ping->new);
# this enables auto-timeout of newly created connections
$ping->auto_timeout(120);
$ping->ping ($con, 'ping_dest@server.tld', sub {
my ($time, $error) = @_;
if ($error) {
# we got an error
}
# $time is a float (seconds) of the rtt if you got Time::HiRes
});
DESCRIPTION
This extension implements XEP-0199: XMPP Ping. It allows you to define a automatic ping timeouter that will disconnect dead connections
(which didn't reply to a ping after N seconds). See also the documentation of the "enable_timeout" method below.
It also allows you to send pings to any XMPP entity you like and will measure the time it took if you got Time::HiRes.
METHODS
new (%args)
Creates a new ping handle.
auto_timeout ($timeout)
This method enables automatic connection timeout of new connections. It calls "enable_timeout" (see below) for every new connection
that was connected and emitted a "stream_ready" event.
This is useful if you want connections that have this extension automatically timeouted. In particular this is useful with modules like
AnyEvent::XMPP::Client (see also SYNOPSIS above).
enable_timeout ($con, $timeout)
This enables a periodical ping on the connection $con. $timeout must be the seconds that the ping intervals last.
If the server which is connected via $con didn't respond within $timeout seconds the connection $con will be disconnected.
Please note that there already is a basic timeout mechanism for dead TCP connections in AnyEvent::XMPP::Connection, see also the
"whitespace_ping_interval" configuration variable for a connection there. It then will depend on TCP timeouts to disconnect the
connection.
Use "enable_timeout" and "auto_timeout" only if you really feel like you need an explicit timeout for your connections.
ping ($con, $dest, $cb, $timeout)
This method sends a ping request to $dest via the AnyEvent::XMPP::Connection in $con. If $dest is undefined the ping will be sent to
the connected server. $cb will be called when either the ping timeouts, an error occurs or the ping result was received. $timeout is
an optional timeout for the ping request, if $timeout is not given the default IQ timeout for the connection is the relevant timeout.
The first argument to $cb will be the seconds of the round trip time for that request (If you have Time::HiRes). If you don't have
Time::HiRes installed the first argument will be undef.
The second argument to $cb will be either undef if no error occured or a AnyEvent::XMPP::Error::IQ error object.
ignore_pings ($bool)
This method is mostly for testing, it tells this extension to ignore all ping requests and will prevent any response from being sent.
AUTHOR
Robin Redeker, "<elmex at ta-sa.org>", JID: "<elmex at jabber.org>"
COPYRIGHT & LICENSE
Copyright 2007, 2008 Robin Redeker, all rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.14.2 2012-01-23 AnyEvent::XMPP::Ext::Ping(3pm)