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Unable to resolve names of network computers

asked 2014-05-12 06:48:11 -0600

TheGameSquid gravatar image

updated 2014-05-12 10:34:32 -0600

I've just installed Fedora 20 on a physical machine (a new laptop) for the first time. I'm used to working with Linux on a bunch of virtual machines, but now that I've got it running on physical hardware I'm experiencing some issues.

I'm able to ping my Fedora 20 laptop from my Windows 7 gaming PC, but only using the .local suffix. So:

Pinging from my Linux laptop to my Windows Desktop:

[robin@HOME-LAPTOP ~]$ ping HOME-DESKTOP
ping: unknown host HOME-DESKTOP

[robin@HOME-LAPTOP ~]$ ping 192.168.0.166
PING 192.168.0.166 (192.168.0.166) 56(84) bytes of data.
64 bytes from 192.168.0.166 (192.168.0.166): icmp_seq=1 ttl=64 time=0.031 ms
64 bytes from 192.168.0.166 (192.168.0.166): icmp_seq=2 ttl=64 time=0.020 ms
64 bytes from 192.168.0.166 (192.168.0.166): icmp_seq=3 ttl=64 time=0.021 ms

Pinging from my Windows Desktop to my Linux Laptop:

C:\Data>ping HOME-LAPTOP
Ping request could not find host HOME-LAPTOP. Please check the name and try again.

C:\Data>ping HOME-LAPTOP.local

Pinging HOME-LAPTOP.local [192.168.0.166] with 32 bytes of data:
Reply from 192.168.0.166: bytes=32 time=3ms TTL=126
Reply from 192.168.0.166: bytes=32 time=3ms TTL=126
Reply from 192.168.0.166: bytes=32 time=3ms TTL=126
Reply from 192.168.0.166: bytes=32 time=4ms TTL=126

Ping statistics for 192.168.0.166:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 3ms, Maximum = 4ms, Average = 3ms

Here is the output of the hostname, domainname and dnsdomainname commands on the Linux laptop

[robin@HOME-LAPTOP ~]$ hostname
HOME-LAPTOP.localdomain
[robin@HOME-LAPTOP ~]$ domainname
(nothing)
[robin@HOME-LAPTOP ~]$ dnsdomainname
localdomain

My hostfile is configured as follows:

127.0.0.1 HOME-LAPTOP HOME-LAPTOP.localdomain localhost localhost.localdomain
::1 HOME-LAPTOP HOME-LAPTOP.localdomain localhost localhost.localdomain

My /etc/resolv.conf only has entries for the two DNS servers provided by my ISP.

  1. I don't understand where the .local suffix is coming from. Where is this defined, and is it possible to change this?
  2. I don't understand why my Windows machine can resolve the hostname of my linux laptop, but not the other way around.

EDIT (Extra info): The environment I'm testing this is in is a very, very simple home setup with router provided by ISP, not domain, no DNS server of my own etc. This is a bare-bones network environment.

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Comments

Does your Linux installation have "avahi" installed? My default installation of Fedora 20 (which included Gnome Desktop) installed avahi as a dependency, which opens a hole in the firewall (UDP 5353) and responds to my hostname with the ".local" suffix.

This is something that's tripped me up before in the past. I seem to always work through the issue, but never document it, so I keep having to reinvent the wheel each time. I'd like to help you identify what's going on here and document for my own benefit...

:) John

jcall gravatar imagejcall ( 2014-05-14 16:22:34 -0600 )edit

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answered 2016-09-25 19:18:56 -0600

Aeyoun gravatar image

updated 2016-09-25 19:20:45 -0600

Windows doesn't currently support mDNS (the .local domains), but Microsoft is slowly adding it to Windows 10. Instead of mDNS, you have to rely on other local network discovery protocols such as NBNS or LLMNR.

Instead of messing with all of that you can rely on your router’s DNS server and DHCP to discover devices over DNS. This will be way more reliable and work with all devices and operating systems. Logon to your router and configure your DHCP to assign a search domain. Assuming you have a somewhat sensible home router, all your machines should be discovererable over DNS with <hostname>.<search-domain> the next time your devices renew their DHCP leases (usually within a day or a reboot).

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Asked: 2014-05-12 06:48:11 -0600

Seen: 2,182 times

Last updated: Sep 25 '16