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Questions tagged [netbios]

NetBIOS was used for translation of short, single label names to IP addresses. It was replaced by DNS in 1999. NetBIOS is obsolete and a critical security vulnerability. The Cybersecurity and Infrastructure Security Agency recommends disabling NetBIOS and LLMNR. https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-278a https://adam-toscher.medium.com/top-five-ways-i-got-domain-admin-on-your-internal-network-before-lunch-2018-edition-82259ab73aaa

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How to configure a Windows machine to allow file sharing with a DNS alias

What process is necessary to configure a Windows environment to allow me to use DNS CNAME to reference servers? I want to do this so that I can name my servers something like SRV001, but still have \\file point to that server, so when SRV002…
Michael Ferrante
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Reducing NetBIOS noise in a 50-seat, 30-server organisation

We are a development shop where all 50-odd workstation computers run Windows 7 SP1 and most of our 20-30 servers are Server 2008 R2 or Server 2008 (there are a few scragglers still on Server 2003). We have a flat, single subnet environment where…
Ashley
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What is the sequence of Windows RPC ports 135, 137, 139 (and higher ports)? What changes with Port 145?

Can someone explain when and how often each of the Windows RPC ports are used? The "core" ones I understand are: Port 135 Port 137 Port 139 Higher ports that are published by Port 135's "catalog" Then I heard that Port 145 came into the mix to…
makerofthings7
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Is the Netbios limt of 15 Charactors still a factor when naming computers?

When you name your Windows computers and Im talking from Windows 2000 to Win7 do you stay within the Netbios name limit for workstations of 15 charactors? I interested if this limit is still relevant in a corporate network wether users login to a…
Canacourse
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NetBIOS "free" network?

I was wondering if someone here has had an enterprise experience running a "NetBIOS-free" network. I have in mind a mid to big Windows-based network. I found some good posts here, here and here. I would like to know if someone actually works (or…
Bob Rivers
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How to remove alternative NetBIOS name

We renamed a Windows 2008 R2 x64 server. We renamed it by running netdom computername oldname /add:newname netdom computername oldname /makeprimary:newname netdom computername newname /remove:oldname REF:…
Sam
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Is NetBIOS really gone on Windows?

I posted a similar question on StackOverflow. Somebody suggested me to post similar question here and see if anybody can give me some insight. From MSDN, I was told that NetBIOS is no longer supported starting from Windwos Vista. Sure enough, I can…
Harvey Kwok
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"account currently disabled" when accessing share, even before logging in

When I try to access a share folder, say \\share-folder, I get the following error message: logon failure: account currently disabled This seems strange to me, since there is no 'account' to be disabled: I wasn't even presented with a login…
Charles
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How to get netbios name from network computer? (Linux)

I want to scan my network periodically and get the Ip, mac, OS and netbios name. So far I got everything done with a bashscript that runs nmap, but the netbiosname is still a problem.
wurlog
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Error adding child Active Directory domain to existing forest

I'm building a test environment containing multiple Active Directory domains in the same forest, but I'm having strange issues while trying to add a child domain to the forest root domain. All servers are Windows Server 2012 R2 VMs running on the…
Massimo
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Is port 139 still vulnerable?

Since the NetBIOS vulnerability is quite well-known a long time ago and heavily popularized, patches have been already released. So, is opening this 139 port OK now?
antreality
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How do you figure out how a windows machine is resolving a share name?

We've been having some weird issues while migrating domains from one forest to another. We tried turning off the domain controllers for the old domain, and all of a sudden, a share which we used to have access to, on yet another domain, on it's own…
Benjamin Peikes
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What are the consequences of giving an AD domain differing NetBIOS and DNS names?

In the past, when creating AD domains, I've used the common convention of using a sub-domain of the company's publicly registered domain name, e.g "corp.mycompany.com" or "int.mycompany.com". I've always accepted the default NetBIOS name when…
dbr
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DFS Namespaces DNS and NetBIOS Name Resolution

I have a Windows Domain which hosts a number of DFS Namespaces in an environment which has DNS servers only (the clients are Windows 7+ and NetBIOS is not disabled on them). Example Domain: andshrew.com DFS Namespace: andshrew.com\Files I have an…
andshrew
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How to disable NetBIOS over TCP/IP on pfSense via DHCP

I have a pfSense applicance running version 2.x. I want to disable NetBios over TCP/IP via the DHCP Server so it is not activated on Windows clients. It's possible to do it with a Windows server but I can't find a way to do it properly on pfSense.…
Florent
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