Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I haven't explained clearly in my previous post.

SSH is several things. Besides a way to run a shell in a remote machine, it is also a transport protocol that can run several communication channels in parallel between the client and the server over a single SSH connection.

When you use SFTP, first a SSH connection is established to the server and then one channel running inside that connection is open and attached to a SFTP server.

In your particular setup, probably the remote SSH server is configured to accept only requests for SFTP channels.

So, now, the remote server can be limiting the number of incoming connections in two ways: (1) limiting the number of SFTP channels per user, or (2) limiting the number of SSH connections per user.

If it happens to be (2), then you can open a SSH connection to the server, and then run several SFTP sessions in parallel over that single SSH connection.

The interesting thing is that the OpenSSH ssh client, has a mode of operation that makes pretty easy to work in that way, establishing a connection and then running sessions (including SFTP sessions) from other programs on top of it.

The following script would tell you if you can actually run several SFTP sessions in parallel:

use strict; use warnings; use Net::OpenSSH; use Net::SFTP::Foreign; my $ssh = Net::OpenSSH->new($host, user => $user, password => $passwor +d, ...) $ssh->error and die "can't connect to remote host: " . $ssh->error; my $sftp1 = $ssh->sftp or die "can't open SFTP channel 1: " . $ssh->er +ror; my $sftp2 = $ssh->sftp or die "can't open SFTP channel 2: " . $ssh->er +ror; print "I am running two SFTP sessions in parallel\n"

In reply to Re^3: REST API with SFTP Pooling by salva
in thread REST API with SFTP Pooling by Sukhster

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

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

How do I use this? | Other CB clients
Other Users?
Others pondering the Monastery: (4)
As of 2022-05-20 09:52 GMT
Find Nodes?
    Voting Booth?
    Do you prefer to work remotely?

    Results (73 votes). Check out past polls.