phpseclib SSH2 write not executing long command

问题:

I am trying to execute an SSH command to a device (firewall). Command is executed when the length is short. When the length is about 1000 characters, command is not being executed.

When I execute the command via putty, that is working as well.

After reading few solutions, I tried to set timeout to 5 seconds. Still, no help.

In the device logs, I can see SSH login and logout. But no activity.

I am using phpseclib ssh version 2.0

$ssh = new SSH2(ip_address);
$ssh->login($user, $password);
$ssh->write($command);
$ssh->setTimeout(5);
$ssh->read()

回答1:

Juddging the source code of the library https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Net/SSH2.php#L4244 we can see, that the waiting time is in-built in the library, so you do not have to set a timeout.

If this doesn't work, you can open an issue on the github, providing your command. IF the library is being supported, you'll get a fix or an answer from the library developers.

回答2:

Issue ended up being in the path between server and the device.