use IO::Socket::Socks;
my $sock = new IO::Socket::Socks(ProxyAddr=>"XXX.XXX.XXX.XXX",
ProxyPort=>"PXXX",
ConnectAddr=>"YYY.YYY.YYY.YYY",
ConnectPort=>PYYY,
AuthType=>"none",
SocksDebug=>1
);
if(!defined $sock) {
# How I can check who is dead XXX.XXX.XXX.XXX:PXXX or YYY.YYY.YYY.YYY:PYYY?
#
}
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