Questions tagged [netbios]

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Newbie Help! Windows Server 2012 R2 being hacked for DDos

I use a German server for RDP. Recently I received an email from my server provider that my server participated DDoS attack. It's so scary! Can anyone point a direction on how to resolve the issue? ...
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24 views

Prevent netbios domain name to appear in “Windows Logs” - “Security” event viewer logs

I am monitoring user access events, Event Ids: 4768 They are shown on Event viewer under "Windows Logs" - "Security" - Audit Success e.g for Event ID 4768: TargetDomainName MOSHE When users on my ...
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1answer
45 views

Access authorization does not work well after replacing a NAS using Kerberos on a Windows server 2012 R2

Environment: A SOHO network under an Active Directory domain controller on a Windows Server 2012 R2. A NAS with access authorization via Kerberos on the domain controller. The DNS server is on the ...
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1answer
854 views

DFS Namespace Resolution without netbios - Why does it work

So, my problem is not that something does not work. But that it works, and I cannot figure out why. Short version: I am able to access \\mydomain\MyDFSRoot even though netbios/LLMNR is off, and DNS-...
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0answers
281 views

nmbd “Packet send failed” error

I'm desperately trying to get folder sharing over SMB working on my local network. I'm running up-to-date arch linux and connecting over wifi using wicd. I have latest samba installed (4.10.4). While ...
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1answer
819 views

Unable to access SMB share only on netbios alias

So we have an ancient Win7 machine which has been used as a file server. This thing has come to the end of its life, and the 20-user limit is starting to hit us hard. I have set up a FreeNAS server, ...
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1answer
4k views

Unable to connect Windows Server 2012 R2 to a Domain Controller. Getting Error

I am unable to connect Windows Server 2012 R2 to a Domain Controller. Getting Error, An Attempt to Resolve the DNS name of a domain controller in the domain being joined has failed. Please verify the ...
2
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1answer
627 views

Name resolution issue on Windows 10

I have a small office network with a handful of Windows / Ubuntu machines of varying releases. A few days ago, one Windows machine lost the ability to access any services on the Ubuntu machines by ...
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0answers
1k views

Multiple NetBIOS names on Windows Server 2016

Until at least Windows 2008R2 it was possible to add multiple NetBIOS names to the same machine, with each additional name resolveable via NetBIOS broadcasts (ie: the classical NetBIOS resolution, not ...
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2answers
576 views

Only one Windows 10 PC cannot ping/access two 2003 R2 servers as of recent

I have two older Win 2003 R2 servers acting as DNS, named DNS1 and DNS2. I have two Windows 10 Pro, hard-wired, same network, latest patches. One is a laptop and one is a desktop. The desktop can ...
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1answer
1k views

What is the firewall-cmd to configure iptables to drop NetBIOS broadcasts?

I have a CentOS 7 server in a LAN together with Windows machines. I have switched on logging in iptables of "to-be-rejected" or "to-be-dropped" packets using firewall-cmd --set-log-denied=all This ...
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0answers
573 views

CentOS (with firewalld) - Forward udp (netbios) broadcast

I'm trying to implement a small lab infrastructure with VSphere with multiple LAN, 2 of the LANs are : Work : with employee laptops Trusted : With all my server (except web that is in a separate DMZ)...
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1answer
291 views

How can I redirect netbios requests?

I've got a fileserver which we've had to decommision... Lets call it FILE-OLD. It's been replaced by a shiny new fileserver, lets call that one FILE-NEW. FILE-NEW has the same IP as FILE-OLD used to ...
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1answer
61 views

How to define a different name for each IP/NIC in the same PC [closed]

In a machine with multiple IP(s) (all in the same subnet) Using NETBIOS or WINS (no DNS) I want to PING this machine using a name for each IP (or a name for each NIC) for example, this IP(s) are in ...
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0answers
2k views

Enabling Network Discovery via GPO does not work when Windows Firewall turned on

Environment: Windows domain I'm trying to turn on network discovery for 100+ computers and I've created a computer-targeted GPO following instructions from this article: https://www.technig.com/...
3
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2answers
4k views

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....
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0answers
201 views

How can I refer to a computer in a domain using the NetBIOS name as is done with users? i.e. domain\computer like domain\user

I've tried researching this, but none of the documentation I've found states how this is done, or if it is possible. I can refer to a domain user like so: domain\user Even when the domain is ...
1
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1answer
520 views

Why do I see a lot of incoming netbios activity on my Windows Firewall?

I have been seeing a lot of firewall drops on port 137 and 138 (netbios) after I enabled default behavior on my Windows FW (Block incoming, Allow outgoing) What is the reason for all netbios activity ...
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2answers
9k views

Windows Server 2016 shares not accessible

After rebooting Windows Server 2016 Essentials, all shares are in-accessible. When accessing the server locally using eg \\myserv I get a list of all shares, but when trying to enter one "The network ...
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1answer
958 views

Slow connection establishment with SMB on Windows 7 using VPN

I am using Windows 7 professional with service pack 1 installed. After installing large amount of system updates (using Windows Update), I started to experience problems with SMB on my PC. This ...
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0answers
521 views

NetBIOS Name Service requests not being sent or answered

I have serious inconsistency on my systems of whether NetBIOS name service requests are working on endpoints. I'm testing with Win7 and Server 2008R2 systems. We do not have a WINS server and don't ...
2
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1answer
3k views

Active Directory Domain where FQDN and NetBIOS name are the same

I have "inherited" an ancient domain (NT4, then upgraded to Win2000 Mixed Mode and now running on Win2003) where the NetBIOS name coincides with the DNS/FQDN one, and this is giving us problems with ...
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1answer
954 views

netbios not working using ip nor symbolic (cname)

There are more than a few questions/answers related to 'System error 53 has occurred' and lots of answers that, does not apply to this issue. I have a computer named 'caicos' and a dns cname  '...
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1answer
925 views

WINS server for inter-VLAN NetBIOS resolution

I have two VLANs. Clients are on one VLAN and there are a couple servers (including a file server) on another VLAN. I have L3 routing between the VLANs. Clients can ping the servers' IP addresses and ...
3
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1answer
2k views

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 ...
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0answers
167 views

Weird RNP samba devices in Workgroup

in the Network folder of all Windows computers and in the output of smbtree command I see a lot of devices with strange names (legitimate names obfuscated with #). WORKGROUP \\WEBSERVER ...
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2answers
3k views

Scan to folder across subnets/VLAN's no longer works

We have a Sharp copier scanner set up on address 172.20.20.200 and a Windows 2008 file server with network shares IP - 172.20.10.82. Up until a week ago we could scan from the copier directly to a ...
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0answers
169 views

Win server 2003: bind netbios name to ip address

I have a Win 2003 enterprise edition cluster. Each group of resources has its own ip address and network name. Here is the result of nbtstat -n: Public LAN(1): Node IpAddress: [192.168.1.7] Scope Id:...
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1answer
149 views

Resolve NetBIOS names without full qualification

I am connected to my office VPN and I can successfully RDP into my computer using the fully qualified name for it PC00001.myofficevpn.plc. When I try to connect using only the hostname PC00001, I do ...
2
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1answer
2k views

OmniOS r151018 file server visible in samba4 Active Directory but not in Windows Network Neighborhood

I have a test setup containing: 3 AD domain controllers (set up to replicate between them), all running Samba 4.3 on Univention Corporate Server 4.1 1 Windows 7 SP1 client joined to the domain 1 ...
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1answer
746 views

What does a REGISTRATION; NEGATIVE; RESPONSE; UNICAST message mean (UDP 137)?

I am seeing on the gateway of a WiFi network a flood of these messages: 12:32:53.334215 IP PRINTER.netbios-ns > 10.10.10.254.netbios-ns: NBT UDP PACKET(137): REGISTRATION; REQUEST; UNICAST 12:32:...
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1answer
106 views

disallow Samba WINS from making hostnames viewable across subnets

I have a samba server set up at work for simple things, such as printer and folder sharing. There is a "internal" subnet and VLAN and a "guest" subnet and VLAN. Samba runs on the same Debian machine ...
1
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1answer
502 views

Windows 7 - VPN and host name lookup

I have set up a VPN server using a Sinology box for accessing my office network from home. I can access all the office IPs, but the host name resolution has some problems. DNS queries work : nslookup ...
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1answer
394 views

Strange NetBIOS query with old computer name

I've one computer in our network which I first named PC029. Shortly after I changed its name to PC021. This was more than a year ago. Today I've found (thanks to Wireshark) that this computer is ...
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0answers
520 views

Mac can connect to samba via IP but not netbios name [closed]

I've setup a samba share on Centos 6. smb.conf [data] path = /data writeable = yes browseable = yes valid users = user01 create mask = 0777 create mode = 0777 directory mode = 0777 share modes = yes ...
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0answers
117 views

Rebuilding Domain From Scratch. How to Use Old Netbios Domain Name on new DC?

I have a client that I am currently in the process of upgrading from Windows Server 2003 to Windows Server 2012R2. They are a small business, working off of a single server. The decision was made to ...
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1answer
1k views

Debian 8(Jessie): netbios name resolution

To resolve netbios names on Debian 7(Wheezy) I used to install winbind and append a 'wins' in /etc/nsswitch.conf. This procedure appears to not work on a freshly installed Debian 8.2(Jessie). It does, ...
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1answer
1k views

When should I use an LMHOST file? [closed]

I'm doing research on the LMHOSTS file. Can anyone tell me when I would want to use the LMHOST file?
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1answer
673 views

NetBios issues with multiple adapters, may not be turning on

I'm working in a Windows 2008 server. I'm getting conflicting messages as to weather or not netbios is enabled. The problem is that my AD users can't "discover" the server. I think that netbios is to ...
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4answers
1k views

How to find all hostnames (even laptops that aren't currently on the network) on a network?

I manage a network that has a lot of laptops. The users that use the laptops are frequently traveling. When someone gets a new computer I run into a problem determining what the hostname should be. ...
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0answers
116 views

Netbios binding in server 2008

I am creating a middle ground server as a funnel point for our regular network to talk to our legacy network, which is running Lantastic 8.0/8.1 on MS Dos 6.1. To do so, I need to install Netbios, ...
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0answers
478 views

Computers not showing up in each other's workgroup browser

I have set up a VPN network between my Windows 7 home computer and my remote Windows Server 2003. This all works fine, the computers can ping each other and I can also access the server's smb shares ...
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0answers
641 views

Samba logging all Macs on our network to log.workstation

We have a Samba share on an Ubuntu 14.04 server. Per-machine logging is switched on via log.%m. I understand from the Samba documentation that %m is the NetBIOS machine name for the client machine. ...
6
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1answer
13k views

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 ...
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0answers
143 views

netbios traffic after adding host to snmp allowed hosts

I noticed in my firewall that there was a ton of traffic for net-bios traffic (udp 137) after adding some hosts to the snmp allowed packets list in windows server 2008. I could not find any ...
0
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1answer
708 views

Show NetBIOS name before Username on Windows 7 Logon

I am setting up a new DC using Windows Server 2008 R2, and my FQDN is MFC.com. When I logon to a client computer (E5530.MFC.com) using that domain, instead of showing "MFC\user.name", it shows "E5530\...
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0answers
661 views

NetBIOS ping issues

I am having an issue with NetBIOS Pinging. When I ping a PC/Server on the network with its NetBIOS Name I am finding that the PC/Server is getting associated with an IP address outside my network (IP ...
0
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1answer
2k views

Windows 7 Spamming Domain Controllers on ports 445 and 139, causing lockout

I have a domain lockout issue and in troubleshooting, I found through netstat that my machine is pummeling the domain controllers on ports 445 and 139. It is creating thousands of user ports to do ...
1
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1answer
4k views

How to set up netbios aliases on smbd / nmbd

The hostname of my server is slightly unfriendly (let's say b4dn4me). I want my users to be able to access the server under a nicer name (let's say bonnie). Samba is installed just to be able to ...
2
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1answer
336 views

Local Link Multicast Name Resolution replaces NetBIOS, yet textbook says otherwise

I am studying from Configuring Windows Server 2008 Network Infrastructure (our environment still has significant Windows 2008 R2 servers), and one question asks You are working on a Windows Server ...