Questions tagged [dnsmasq]
dnsmasq is a lightweight DHCP, DNS and TFTP server application for *nix platforms intended for use on small and home networks.
397
questions
0
votes
0
answers
17
views
How to dynamically update dnsmasq with openvpn clients
I have openvpn working, and I can ping via hostnames if they are in the dnsmasq hostfile, but currently I put them in the hostfile with a learn-address script. The problem is that this script only ...
0
votes
1
answer
79
views
dnsmasq - failed to bind DHCP server socket: Address already in use - DHCP proxy
I have some issue with dnsmasq. I'm trying to use the existing dhcp that is provide by my router to create a pxe server but dnsmasq give me an errror.
/etc/dnsmasq.conf :
port=0
log-dhcp
dhcp-range=...
- 1
0
votes
0
answers
13
views
dnsmasq: Change DHCP range based on group of MAC address
Is it possible to change the DHCP range dnsmasq gives out based on the MAC address block. For example, I want all MACs in the block 00:0C:29 to have a different DHCP range compared to every device on ...
- 3
-1
votes
0
answers
57
views
OpenWrt: Local Domain overridden by public DNS
I have made a weird observation regarding my local domain resolution using my OpenWrt router.
My goal was to avoid needing a public DNS lookup, when going to my server in my home network, meaning www....
- 1
0
votes
1
answer
16
views
Can I install dnsmasq on lamp web server?
Is it possible to install and run dnsmasq on a shared host webserver (standard lamp stack)? And how would one do this?
I use Siteground and Dreamhost. I think I can run a lamp stack on my NAS too ...
- 178
0
votes
0
answers
27
views
DNSmasq: Assign address names to dhcp range
I'm currently assigning static host records in dnsmasq like this:
host-record=test.example.com,192.168.1.1
dhcp-host=56:54:53:52:51:03,192.168.1.1,8h
However i'd like to give my dynamically assigned ...
1
vote
2
answers
213
views
DNS problems on pool of preemptible-only nodes on GKE: endpoints of kube-dns service keeps failed pods
I do have a GKE k8s cluster (k8s 1.22) that consists of preemptible nodes only, which includes critical services like kube-dns. It's a dev machine which can tolerate some broken minutes a day. Every ...
- 111
0
votes
0
answers
28
views
dnsmasq as dhcp server using wrong src ip
I'm running dnsmasq as a DHCP server on an interface that has multiple IP addresses. The problem is that dnsmasq is not using its server IP (10.13.7.33) as the src IP in its replies but instead ...
- 778
0
votes
1
answer
33
views
How to dynamically resolve domains?
I've got a zone .default.svc.cluster.local with a separate server for it, but I don't want to type all that.
Instead, I want to type XXX.localhost to get to the XXX.default.svc.cluster.local.
I've ...
- 111
0
votes
0
answers
155
views
DNSMASQ DHCP with Multiple VLANS --- How to identify the originating VLAN?
I'm curious as to what best practice would be when serving DHCP to multiple VLANs from a single DNSMASQ instance.
(The DNSMASQ server is a KVM guest.)
Do I:
A: Create a virtual NIC on the DNSMASQ ...
- 724
0
votes
0
answers
102
views
Dnsmasq how to make captive portal pop up
I am trying to implement captive portal with dnsmasq.
In dnsmasq config
address=/#/10.42.0.1 doesn't work,
so I have to use ugly:
address=/com/10.42.0.1
address=/uk/10.42.0.1
address=/org/10.42.0.1
...
- 101
0
votes
1
answer
27
views
How can I implement single letter domains for LAN internet browsing using dnsmasq?
In our LAN I have several services running in multiple hosts, and clients using DHCP with dnsmasq.
My goal is that any user can type a single letter (e.g. c) in the browser search bar and get in ...
- 101
0
votes
1
answer
32
views
Does Long DNS TTL matter if you can shut down the server using the old IP?
If we retain the old IP when we transition a website to a new IP, would browsers/ISP servers be smart enough to refresh the DNS record if the server using the old IP is offline?
0
votes
0
answers
298
views
dnsmasq DHCP not working, not replying to DHCP requests
I have setup dnsmasq as DHCP server on a CentOS VM, however it is not replying to DHCP requests. What could be the issue? Following is the configuration and tcpdump logs.
interface=ens224
listen-...
- 101
0
votes
1
answer
2k
views
Dnsmasq server does not work when configured as the primary DNS in my router
I have a LAN with IP range 192.168.2.* and the following configuration:
There is a router of address 192.168.2.1
There is a MacOS machine of address 192.168.2.11
There is a vagrant (virtual box) ...
- 185
0
votes
1
answer
77
views
How to blacklist private dns resolution inside docker?
Problem
I want to block DNS resolutions that return private range IP addresses. What I've found so far is that to do such thing you need to setup a cache/recursive DNS server. However since I want to ...
- 74
0
votes
1
answer
2k
views
Using dnsmasq in a Docker container for the host and for Docker internal DNS resolution
I'm working on a web project that consists of multiple services. Every service has it's own docker-compose.yml file that declares it's "app" and it's possible dependencies (databases etc). ...
- 101
1
vote
0
answers
86
views
Why do I get an error when connecting to a tftp server PXE-T00 pxelinux.0 filename too long?
As a DHCP server, I have a Mikrotik configured with options 66 and 67.
/ip dhcp-server option
add name="option66" code=66 value="s'10.10.14.200'"
add name="option67" code=...
- 111
0
votes
2
answers
150
views
dnsmasq: serve DHCP on bridge whose IP is out of subnet
I want to use dnsmasq to serve DHCP on a Linux bridge:
only one VM is expected to connect to the bridge
the VM's MAC is fixed
VM should get a static IP via DHCP
the bridge itself should not take any ...
- 101
0
votes
2
answers
323
views
configure dnsmasq to give out addresses in different ranges
I'd like to give unknown clients an ip address in one range and known clients in another (that is a static one).
I tried quite a lot now and don't seem to get it working. All I get is an "no ...
- 361
0
votes
0
answers
17
views
on hotspot running openvpn how to share obtained dhcp-option DNS?
There is linux box being a hotspot for number of devices. It also runs openvpn client which is supposed to be shared with connected hotspot clients. Openvpn receives PUSH_REPLY dhcp-option DNS x.x.x.x ...
- 121
1
vote
1
answer
347
views
Container DNS resolutions works only after restarting dnsmasq
[Update] add software versions
I have a home server which runs docker and DNS/DHCP for my home network. It's all working quite nicely except for one thing: Containers can't do DNS resolution after ...
- 183
1
vote
1
answer
213
views
Setting up dnsmasq as a DNS and DHCP server on a LAN
My routers:
Main Router: 192.168.100.1
Second Router: 192.168.101.1
The Main Router is provided by my ISP(a modem/router combo all in one). I don't have control over its settings. Except for ...
- 13
-1
votes
1
answer
157
views
Is it possible to resolve a public domain in local network?
Is it possible to resolve a public domain (ex: http://example.com/ ) in local network ?
The local network has a server which hosted a website with domain http://example.com/.
The local network is ...
- 9
0
votes
0
answers
24
views
Clients couldn't query DNS server listening on router interface's secondary IP
I have a router where its interface has two IPs
$ ip addr
br-lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
link/ether <MA> brd ff:ff:ff:ff:ff:ff
...
- 167
0
votes
1
answer
44
views
Is it possible to merge host names on two Dnsmasq instances?
I have a router and a dump AP that are connected with a wire. The router has two interfaces, one is for LAN (192.168.1.1/24) and the other for WAN. The AP also has two interfaces, one is for LAN (192....
- 167
0
votes
0
answers
48
views
How do I run dnsmasq and samba ad dc on the same server?
I am able to run dnsmasq with no issues but only when I don't have samba (ad dc) running. With dnsmasq running I am able to resolve both internal and external hostnames within my network. However, ...
- 19
-1
votes
1
answer
238
views
IPv6 dnsmasq dig refused
I'm trying to enable both IPv4 and IPv6 stack on SUSE 15 environment. I've assigned both IPv4 and IPv6 addresses to the same interface using /opt/vmware/share/vami/vami_set_network. Both IPv4 and IPv6 ...
1
vote
1
answer
196
views
How run a dnsmasq inside QEMU, providing netboot service to other VMs
EDIT: WIP: The core reason for the failures explained below is due to me not bringing up the host TAP interfaces at the right time, if I allow QEMU to handle the creation of the tap devices, ...
- 111
0
votes
0
answers
131
views
How I can configure my local machine to use a docker hosted dns server alonsside with ant other dns settings for specific domains?
I have the following docker-compose.yml used as php web app local solution:
version: "3.1"
services:
nginx:
image: nginx:1.13
volumes:
- "./configuration/nginx.conf:/...
0
votes
1
answer
45
views
Do nodes in a single-switch ethernet network governed by dnsmasq communicate directly, or via the router?
Variations on this question exist, but I cannot be certain my exact situation has been asked.
I am setting up a simple ethernet network that looks like this:
On Node 0 ("rpi1") I am running ...
- 113
0
votes
1
answer
440
views
Use dnsmasq as DNS for OpenVPN
So to the best of my understanding, I have all the pieces, namely, DNSmasq and OpenVPN working fine, although independently. What I've done?
Installed OpenVPN using this: https://github.com/Nyr/...
- 53
0
votes
0
answers
117
views
Local network domain resolution times out with DNSMasq, but works fine remotely
For some reason, I can't get this to reliably work the way I want it, across both Linux and Windows, and even across different machines running the same OS.
Let's assume I have a local machine running ...
- 11
0
votes
0
answers
251
views
pihole won't start: failed to create listening socket for port 53: Permission denied
Pi hole was working fine on CentOS 7 until I used pihole -up
Now it fails with failed to create listening socket for port 53: Permission denied
Pi-hole version is v5.3.1 (Latest: v5.3.1)
AdminLTE ...
- 209
0
votes
1
answer
106
views
Force host to use alternate DNS servers on unresolvable queries with dnsmasq
So here is the situation. I have an IOT device running a Digital Signage system. I am trying to set it up so that it hosts it's own WIFI network and a user can connect to that WIFI, enter an http ...
- 3
1
vote
0
answers
294
views
dnsmasq ignores result from IPV4 upstream servers when there is IPV6 upstream server (non reachable) also configured
We have configured dnsmasq for caching dns responses to improve the dns response time. It woks fine until there was only an IPV4 upstream server is configured.
In a different environment with IPV4 and ...
- 11
1
vote
1
answer
266
views
Wildcard CNAME record specified by libvirts dnsmasq:options namespace doesn't work, only specific subdomains works
Since v5.6.0, libvirt added a dnsmasq namespace with the element, which allows to specify options directly to the underlying dnsmasq server. I'd like to create a wildcard DNS entry for my applications ...
- 496
0
votes
0
answers
35
views
Dnsmasq to resolve its own host name to one of its own ipaddr
On a multihome system how to configure Dnsmasq so it resolves its own host name to its own ip address, preferably choosing the right address depending on the requestor address?
I see the option --...
- 538
1
vote
0
answers
832
views
dnsmasq: How to set alias domain / multiple DNS suffixes for local hostname resolution?
Is it possible to set multiple search domains via dnsmasq/DHCP? Due to some migration, I need multiple clients to be able to:
ping server.old-domain
ping server.new-domain
# both should work, .old-...
- 11
0
votes
1
answer
592
views
Using DNSMasq, how do I provide a single static route for an IPv6 network?
Assuming I am running two Dual stack IPv4/IPv6 networks:
Network 1: Internet connected
IPv4 - 192.0.2.0/24 provides a default route via 192.0.2.1
IPv6 - 2001:db8::0/64 provides a default route via ...
- 873
0
votes
0
answers
27
views
dnsmasq config file, folding long lines possible?
Is there an escape character, or any other way, to fold long dnsmasq.conf lines for better readability? Eventually also adding comments on the lines?
For example, I have a dhcp-option line (option 121,...
- 11
0
votes
1
answer
137
views
Linux: How to setup dns server via dnsmasq and connect a second machine with it?
Setup:
I have two vms running: prime and second.
On the prime dnsmasq is installed.
What I need to accomplish:
Setting a second(machine) so it connects and looks for domain names on the dns server.
(...
0
votes
1
answer
312
views
Does dnsmasq honor no-resolv when resolv-file is specified?
Do these dnsmasq options conflict? The router wants to write resolv-file to the config, but allows me to append no-resolv. Will dnsmasq agree to ignore resolv-file in this case?
resolv-file=/tmp/...
- 2,339
1
vote
0
answers
137
views
dnsmasq - detect mx-host changes without service restart
I have a mailserver on ubuntu with postfix and dnsmasq. It has a bunch of mx-host records on the /etc/dnsmasq.conf config file. I need to dynamically update (add/remove) these mx-host entries (and the ...
- 111
-4
votes
1
answer
913
views
How to disable dnsmasq cache [closed]
I just want to disable the caching functionality, I do not need it and it only creates bad behavior in my environment.
Not interested in any other solution, if you do not know, do not comment.
0
votes
1
answer
1k
views
Resolving Domain Name to Private IP AND Public IP Simultaneously [closed]
Background
(Skip if not interested)
I have a dev server running in my local network. I can reach it easily by private IP (192.168.2.4). I have my firewall ports open on the server for :80 so I can ...
- 133
0
votes
1
answer
430
views
UEFI-based laptops not displaying the iPXE boot menu
UEFI-based laptops not displaying the iPXE boot menu
I'm testing iPXE to replace the old PXE solution. For my test environment, I'm using CentOS 8 with iPXE, Dnsmasq and Apache installed from the ...
- 1
1
vote
0
answers
120
views
DNSMASQ serve different dns results to different subnets
In my network infrastructure I have multiple subnets intended to segregate different types of devices. I would like the ability to serve different DNS responses from different DNS servers based on the ...
- 11
3
votes
0
answers
234
views
Q: Configuring dnsmasq to filter A or AAAA queries
Can I configure dnsmasq to respond to either ipv4(A) or ipv6(AAAA) queries only?
I am using dnsmasq to forward queries from an internal subnet to a WAN connection.
Unfortunately, sometimes I will only ...
- 31
0
votes
1
answer
322
views
Is there a DNS cache that can automatically re-resolve its cache around the TTL timeout?
This is for a server setup with a wobbly upstream DNS for company internal server names. Sometimes, when an entry has fallen from the cache due to TTL, and our system tries to resolve it, the upstream ...
- 155