NetBIOS DNS

NetBIOS DNS

NetBIOS DNS
NetBIOS DNS
2024-11-01 19:46:17 - last edited 2024-11-04 01:41:08
Tags: #DNS
Model: ER8411  
Hardware Version: V1
Firmware Version: 1.2.2

I'm trying to figure out how to get computer name resolution on my network.

 

I have a number of devices on my LAN, with device names "COMPUTER1" (IP 182.168.0.101), "COMPUTER2" (IP 182.168.0.102), etc. My router has IP 192.168.0.1. In this case, COMPUTER1 has a DHCP pool IP and COMPUTER2 has a permanent DHCP address reservation.

 

From COMPUTER1, I would like to be able to do a `ping COMPUTER2` and have it resolve the device name to the correct IP address. When I had the same devices on my consumer-grade ISP-provided modem/router device, this worked out of the box. On my ER8411 business router, it doesn't seem to work at all.

 

To clarify, from COMPUTER1, a `ping 192.168.0.102` works fine, but `ping COMPUTER2` times out with a "could not find host COMPUTER2".

 

Am I missing something obvious?

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#1
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3 Reply
Re:NetBIOS DNS
2024-11-06 08:16:15

Hi @SomeNetEngineer 

Thanks for posting in our business forum.

Have you examined the firewall on your router? Specifically, I mean the IGMP ping-related firewall. Can you paste a screenshot indicating these are allowed?

The router supports it and it should work as we have tested it.

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#2
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Re:NetBIOS DNS
2024-11-26 03:01:13

  @Clive_A It's not a ping/firewall issue, it's a DNS issue. 

 

I have a Windows machine with hostname "SERVER1" on the network, where the router (ER8411) has IP 172.18.0.1.

 

Running `nslookup SERVER1 172.18.0.1`, which forces it to use the router as the DNS server, returns:

```

Server:  UnKnown
Address:  172.18.0.1

*** UnKnown can't find SERVER1: Non-existent domain

```

 

Other (normal) DNS queries with this same command, e.g.

```

> nslookup tp-link.com 172.18.0.1
Server:  UnKnown
Address:  172.18.0.1

Non-authoritative answer:
Name:    tp-link.com
Addresses:  2600:9000:215f:7400:0:275e:4840:93a1
          2600:9000:215f:7a00:0:275e:4840:93a1
          2600:9000:215f:6c00:0:275e:4840:93a1
          2600:9000:215f:9000:0:275e:4840:93a1
          2600:9000:215f:8600:0:275e:4840:93a1
          2600:9000:215f:5200:0:275e:4840:93a1
          2600:9000:215f:800:0:275e:4840:93a1
          2600:9000:215f:dc00:0:275e:4840:93a1
          54.192.51.8
          54.192.51.93
          54.192.51.2
          54.192.51.85

```

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#3
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Re:NetBIOS DNS
2024-11-26 03:44:01

Hi @SomeNetEngineer 

SomeNetEngineer wrote

  @Clive_A It's not a ping/firewall issue, it's a DNS issue. 

 

I have a Windows machine with hostname "SERVER1" on the network, where the router (ER8411) has IP 172.18.0.1.

 

Running `nslookup SERVER1 172.18.0.1`, which forces it to use the router as the DNS server, returns:

```

Server:  UnKnown
Address:  172.18.0.1

*** UnKnown can't find SERVER1: Non-existent domain

```

 

Other (normal) DNS queries with this same command, e.g.

```

> nslookup tp-link.com 172.18.0.1
Server:  UnKnown
Address:  172.18.0.1

Non-authoritative answer:
Name:    tp-link.com
Addresses:  2600:9000:215f:7400:0:275e:4840:93a1
          2600:9000:215f:7a00:0:275e:4840:93a1
          2600:9000:215f:6c00:0:275e:4840:93a1
          2600:9000:215f:9000:0:275e:4840:93a1
          2600:9000:215f:8600:0:275e:4840:93a1
          2600:9000:215f:5200:0:275e:4840:93a1
          2600:9000:215f:800:0:275e:4840:93a1
          2600:9000:215f:dc00:0:275e:4840:93a1
          54.192.51.8
          54.192.51.93
          54.192.51.2
          54.192.51.85

```

 

I know what you are saying or the things you refer to.

There is no issue with the NetBIOS. Like I said, it worked.

 

One Work PC, one my laptop.

 

 

 

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update!Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
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#4
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