Here is the code and the output :

Code :

 use Net::OpenSSH::Compat::SSH2 qw(:supplant);
use Net::SSH2;

$Net::OpenSSH::debug=-1;

my $ip = 'xxx';
my $port = 22;
my $username = 'user1';
my $password = 'user1';

my $ssh2 = Net::SSH2->new();
$ssh2->connect($ip,$port) or die $!;
my $res = $ssh2->auth(username => $username,
                      password => $password,) or die "$!",$ssh2->error
+;
print "result is $res\n";
[download]

Output :

 > perl compatssh2.pl 
# ctl_path: /home/smokes/.libnet-openssh-perl/regression-192.168.2.-11
+175-417065, ctl_dir: /home/smokes/.libnet-openssh-perl/
# _is_secure_path(dir: /home/smokes/.libnet-openssh-perl, file mode: 1
+6832, file uid: 1003, euid: 1003
# _is_secure_path(dir: /home/smokes, file mode: 16877, file uid: 1003,
+ euid: 1003
# set_error(0 - 0)
# call args: ['ssh','-o','ServerAliveInterval=30','-x2MN','-o','Number
+OfPasswordPrompts=1','-o','PreferredAuthentications=keyboard-interact
+ive,password','-S','/home/smokes/.libnet-openssh-perl/user1-192.168.2
+.-11175-417065','-l','user1','-p',22,'192.168.2.215','--']
# file object not yet found at /home/smokes/.libnet-openssh-perl/regre
+ssion-192.168.2.-11175-417065
# file object not yet found at /home/smokes/.libnet-openssh-perl/regre
+ssion-192.168.2.-11175-417065
# file object not yet found at /home/smokes/.libnet-openssh-perl/regre
+ssion-192.168.2.-11175-417065
# file object not yet found at /home/smokes/.libnet-openssh-perl/regre
+ssion-192.168.2.-11175-417065
# file object not yet found at /home/smokes/.libnet-openssh-perl/regre
+ssion-192.168.2.-11175-417065
# file object not yet found at /home/smokes/.libnet-openssh-perl/regre
+ssion-192.168.2.-11175-417065
# tracer attached, ssh pid: 11177, tracer pid: 11178
# set_error(1 - unable to establish master SSH connection: the authent
+icity of the target host can't be established, the remote host public
+ key is probably not present on the '~/.ssh/known_hosts' file)
# _kill_master: 11177
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 0, rc: 
# killing master with signal TERM
# waitpid(master: 11177) => pid: 0, rc: 
# waitpid(master: 11177) => pid: 11177, rc: Interrupted system call
# DESTROY(Net::OpenSSH=HASH(0xdb75b0), pid: <undef>)
Interrupted system callLIBSSH2_ERROR_SOCKET_DISCONNECTunable to establ
+ish master SSH connection: the authenticity of the target host can't 
+be established, the remote host public key is probably not present on
+ the '~/.ssh/known_hosts' file at compatssh2.pl line 13.
[download]

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