Alpha Software Mobile Development Tools:   Alpha Anywhere    |   Alpha TransForm subscribe to our YouTube Channel  Follow Us on LinkedIn  Follow Us on Twitter  Follow Us on Facebook



The Alpha Software Forum Participation Guidelines

The Alpha Software Forum is a free forum created for Alpha Software Developer Community to ask for help, exchange ideas, and share solutions. Alpha Software strives to create an environment where all members of the community can feel safe to participate. In order to ensure the Alpha Software Forum is a place where all feel welcome, forum participants are expected to behave as follows:
  • Be professional in your conduct
  • Be kind to others
  • Be constructive when giving feedback
  • Be open to new ideas and suggestions
  • Stay on topic

Be sure all comments and threads you post are respectful. Posts that contain any of the following content will be considered a violation of your agreement as a member of the Alpha Software Forum Community and will be moderated:
  • Spam.
  • Vulgar language.
  • Quotes from private conversations without permission, including pricing and other sales related discussions.
  • Personal attacks, insults, or subtle put-downs.
  • Harassment, bullying, threatening, mocking, shaming, or deriding anyone.
  • Sexist, racist, homophobic, transphobic, ableist, or otherwise discriminatory jokes and language.
  • Sexually explicit or violent material, links, or language.
  • Pirated, hacked, or copyright-infringing material.
  • Encouraging of others to engage in the above behaviors.

If a thread or post is found to contain any of the content outlined above, a moderator may choose to take one of the following actions:
  • Remove the Post or Thread - the content is removed from the forum.
  • Place the User in Moderation - all posts and new threads must be approved by a moderator before they are posted.
  • Temporarily Ban the User - user is banned from forum for a period of time.
  • Permanently Ban the User - user is permanently banned from the forum.

Moderators may also rename posts and threads if they are too generic or do not property reflect the content.

Moderators may move threads if they have been posted in the incorrect forum.

Threads/Posts questioning specific moderator decisions or actions (such as "why was a user banned?") are not allowed and will be removed.

The owners of Alpha Software Corporation (Forum Owner) reserve the right to remove, edit, move, or close any thread for any reason; or ban any forum member without notice, reason, or explanation.

Community members are encouraged to click the "Report Post" icon in the lower left of a given post if they feel the post is in violation of the rules. This will alert the Moderators to take a look.

Alpha Software Corporation may amend the guidelines from time to time and may also vary the procedures it sets out where appropriate in a particular case. Your agreement to comply with the guidelines will be deemed agreement to any changes to it.

Bonus TIPS for Successful Posting

Try a Search First
It is highly recommended that a Search be done on your topic before posting, as many questions have been answered in prior posts. As with any search engine, the shorter the search term, the more "hits" will be returned, but the more specific the search term is, the greater the relevance of those "hits". Searching for "table" might well return every message on the board while "tablesum" would greatly restrict the number of messages returned.

When you do post
First, make sure you are posting your question in the correct forum. For example, if you post an issue regarding Desktop applications on the Mobile & Browser Applications board , not only will your question not be seen by the appropriate audience, it may also be removed or relocated.

The more detail you provide about your problem or question, the more likely someone is to understand your request and be able to help. A sample database with a minimum of records (and its support files, zipped together) will make it much easier to diagnose issues with your application. Screen shots of error messages are especially helpful.

When explaining how to reproduce your problem, please be as detailed as possible. Describe every step, click-by-click and keypress-by-keypress. Otherwise when others try to duplicate your problem, they may do something slightly different and end up with different results.

A note about attachments
You may only attach one file to each message. Attachment file size is limited to 2MB. If you need to include several files, you may do so by zipping them into a single archive.

If you forgot to attach your files to your post, please do NOT create a new thread. Instead, reply to your original message and attach the file there.

When attaching screen shots, it is best to attach an image file (.BMP, .JPG, .GIF, .PNG, etc.) or a zip file of several images, as opposed to a Word document containing the screen shots. Because Word documents are prone to viruses, many message board users will not open your Word file, therefore limiting their ability to help you.

Similarly, if you are uploading a zipped archive, you should simply create a .ZIP file and not a self-extracting .EXE as many users will not run your EXE file.
See more
See less

Port Knocking has anyone implemented this

  • Filter
  • Time
  • Show
Clear All
new posts

    Port Knocking has anyone implemented this

    I am designing a desktop app and working on an update option and i don't want to leave the ftp ports open when not needed. I use a linux mysql backend and i don't see any posts even remotely close. I'm going to see if I can find a 3rd party command line to run from alpha if thats my only choice. I have seen the sockets and other datagram option i may be able to make alpha do it's own port knocking if i know what the server is looking for when the port is knocked.

    Ok so i found out that i need to send a SYN packet to 3 ports configured on the server. There is no reply from the server when these packets are sent. When they are received in the correct order the ports on the server opens to the ip address that requested by knocking. any help figuring out how to use sockets with this would be awesome.
    Last edited by steve745; 01-21-2016, 11:07 PM.

    Re: Port Knocking has anyone implemented this

    Sending a SYN packet is a lower-level socket operation than what is available in Xbasic. You will not be able to do this using Xbasic sockets.

    Lenny Forziati
    Vice President, Internet Products and Technical Services
    Alpha Software Corporation


      Re: Port Knocking has anyone implemented this

      Thanks For replying Lenny I have found a command line app that will do the knocking for me using the sys_shell() command

      here is a sample of the code so if anyone else is looking for this type of approach.

      I had to get an app from and here is the code
      sys_shell("c:\knock\knock-win32-port\Release\knock.exe 7000 8000 9000")
      'Displays a message box (style:'OK Button', image: 'Information symbol', id: 'kn').
      DIM SHARED  kn_result as N
      DIM SHARED  kn_OK_Button as L 
      kn_OK_Button = .F.
      title_var = ""
      message_text_var = <<%text%
      Port is OPEN
      kn_result=ui_msg_box(title_var,message_text_var,UI_OK+ UI_FIRST_BUTTON_DEFAULT+ UI_INFORMATION_SYMBOL)
      'Test to see which button on the message box was pressed....
      	CASE kn_result = UI_OK_SELECTED
      		kn_OK_Button= .t.
      sys_shell("c:\knock\knock-win32-port\Release\knock.exe 9000 8000 7000")
      this will just knock the ports and when complete open a dialog telling you they are open after you click ok the command runs to close the ports. Hope this is helpful for someone other than me.


        Re: Port Knocking has anyone implemented this

        Originally posted by steve745 View Post
        this will just knock the ports and when complete open a dialog telling you they are open after you click ok the command runs to close the ports. Hope this is helpful for someone other than me.
        The SYS_SHELL_WAIT() function runs a command and waits until it is completed before returning control to Alpha Five.
        Al Buchholz
        Bookwood Systems, LTD
        Weekly QReportBuilder Webinars Thursday 1 pm CST

        Occam's Razor - KISS
        Normalize till it hurts - De-normalize till it works.
        Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
        When we triage a problem it is much easier to read sample systems than to read a mind.
        "Make it as simple as possible, but not simpler."
        Albert Einstein


          Re: Port Knocking has anyone implemented this

          Yes that is the point it knocks on the ports and then enters and when complete will knock a seq again to close the ports