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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for October 29th, 2021

Windows: unblocking SMB/NetBIOS/CIFS/File-and-Printer-sharing traffic from other subnets

Posted by jpluimers on 2021/10/29

If you enable File and Printer sharing on Windows, by default the firewall only enables it on private networks for the local subnet as remote address (for domain networks, it allows “Any”) as seen on the picture below.

When your network consists of multiple subnets, for instance when it is large, or multiple sites are connected via site-to-site VPN (often called LAN-to-LAN VPN) solutions, then these subnets cannot access each others files or printers.

Realising these default blocks, they are easy to resolve as explained in for instance [WayBack] Windows firewall blocking network shares through VPN server – Server Fault by [WayBack] Brian:

I realize this is almost three years late, but I just spent today fighting with the same problem. I did get it working, so I figured I’d share. Note that I’m using a Windows 7 PC as the file server; other versions might need slightly different configuration.

In the “Windows Firewall with Advance Security”, there are several “File and Printer Sharing” rules:

  • File and Printer Sharing (NB-Datagram-In)
  • File and Printer Sharing (NB-Name-In)
  • File and Printer Sharing (NB-Session-In)
  • File and Printer Sharing (SMB-In)

(There are additional rules, but I didn’t care about printer sharing. The same changes would apply if you want those.)

File and Printer Sharing appears to default to “Local subnet” only. You’ll need to add the subnet of your VPN clients.

Modify each of those rules as follows:

  1. Open the Properties dialog for the rule.
  2. Navigate to the Scope tab.
  3. In the Remote IP address section, the “These IP addresses” radio button should be selected.
  4. Click “Add…” next to the list of addresses. By default, only “Local subnet” is in the list.
  5. In the “This IP address or subnet:” field, enter the subnet assigned to your VPN clients (this is probably 192.168.1.0/24 in the OP, but if not, it’s the subnet assigned to the VPN adapter on the client side), then click OK.
  6. If you’re also using IPv6, add the VPN client IPv6 subnet as well.

That was enough for me to access file shares over the VPN.

(If you want to do it manually, you need to open TCP ports 139 and 445, and UDP ports 137 and 138, in the file server’s firewall.)

Hopefully I will find some time in the future to automate this using PowerShell, as netsh names are localised do hard to make universal.

These links might help me with that:

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Posted in Communications Development, Development, Internet protocol suite, Power User, SMB, TCP, Windows | Leave a Comment »

Happy 25th birthday Internet Archive! Thanks Brewster for setting it in motion.

Posted by jpluimers on 2021/10/29

View the short video about the first crawl back in 1996:

Then head to anniversary.archive.org and enjoy more bits of its history.

One of the first articles: [Wayback] Archive.is: Brewster Kahle . In Scientific American (no original on-line at archive.org any more [Wayback/Archive.is])

–jeroen

Posted in Uncategorized | Leave a Comment »

Rebrickable (@Rebrickable) | lets you easily find official or custom sets you can build using your existing LEGO sets and provides all building instructions

Posted by jpluimers on 2021/10/29

Via [WayBack] Thread by @Foone: “stupid project I’ve thought about making for years: You go through and index your lego box and enter in which bricks you have, and it calcul […]”

stupid project I’ve thought about making for years:
You go through and index your lego box and enter in which bricks you have, and it calculates which sets you probably had.
it’s basically a big nostalgia tool for all us nerds in our 30s who have those few distinctive parts but can’t remember which set they got them in because they were only 5 at the time.
Thanks to @ProfBrickkeeper I now know that this pretty much already exists:
twitter.com/Rebrickable
you tell it what pieces you have and it finds official or unofficial sets you can build with them.

Neat!

I don’t know if it can do near-matches (like “you have 98% of the pieces you need for this set”) because you may have lost some parts, but it’s definitely a big step towards what I was wanting

[WayBack] Rebrickable (@Rebrickable) | lets you easily find official or custom sets you can build using your existing LEGO sets and provides all building instructions:

  • [WayBack] Rebrickable | Rebrickable – Build with LEGO

    Combine your old LEGO® to build new creations

    What can you build?

  • [WayBack] About Rebrickable | Rebrickable – Build with LEGO

    What is Rebrickable?

    Rebrickable will show you which LEGO sets you can build from the sets and parts you already own. You can choose from official LEGO sets or thousands of MOCs (My Own Creations) submitted by hundreds of designers. All MOCs include building instructions and full parts lists.

    I HAVE THIS

    +

    AND A BUNCH OF THESE

    =

    I CAN BUILD THIS, YAY!

    Unless you have a LOT of sets, you will usually be missing a few pieces. In these cases Rebrickable will show you exactly what you are missing and even provide suggested sets that you could buy which will get you those pieces – effectively showing you how to buy two sets for the price of one!

 

–jeroen

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Posted in Fun, LifeHacker, Power User | Leave a Comment »

 
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