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0answers
15 views

Adding additional nameservers with resolvconf, dnsmasq & networkmanager

I'm running resolvconf, dnsmasq and interfaces&connections are managed by NetworkManager (nm). dnsmasq is supposed to cache dns entries, and use upstream servers configured via DHCP and manually. ...
-1
votes
1answer
20 views

DNS problem: no A record

Ten days ago, i installed a debian 9 stretch, at Kimsufi by OVH. i receive an email from support wich contains a problem with A record, my server is ns.xzave.net, and there is no record A on my server ...
-1
votes
2answers
44 views

Bind9 shared libraries: libbind vs libdns?

There are two packages libbind and libdns packaged by Debian, they're both described as, The Berkeley Internet Name Domain (BIND) implements an Internet domain name server. BIND is the most ...
-2
votes
1answer
34 views

I am not able to receive emails on my VPS [closed]

I am using linux (Debian 8) on my VPS server. I use virtualmin to handle all domains. I created emails using 'create new user' in the 'edit users' section. I can send emails to others, but I am not ...
0
votes
0answers
52 views

Can't resolve domain with Unbound (DNSSEC problem?)

I'm using a raspberry with pi-hole and unbound (1.6.0) to manage my DNS. Some days ago, I recognized that I have troubles with some domains but I didn't thought about DNS problems on my side. Today I ...
0
votes
0answers
84 views

How to install Postfix in an all default way (no setup wizard) and to be used with no email DNS records?

The following question is a follow up to this question. In a latest Debian 9 stable I desire to install Postfix to send email from my machine to my very own Gmail account by the quickest install ...
1
vote
1answer
47 views

Debian 8 - Lan connection works but no internet [Unknown host]

I have a Debian 8 server that has been running great for about a year. All of a sudden I am no longer getting internet access. The server is connected over an ethernet cable and I can SSH into over ...
1
vote
1answer
58 views

Have unexpected hostname and IP

I built a new rPi3 with Stretch on it; its name is rpi3ohv2. I set it up as 192.168.1.4 and later (Dec 28) changed it to .5 When I ping, dig and nslookup it, it comes up as .4 nslookup rpi3ohv2....
0
votes
1answer
66 views

Block or drop DNS requests within forwarded packets

I have a default Debian 9 installed in minipc, which is forwarding packets further. I wish to be able to block hosts via domains, means if any forwarded packet of DNS type has request for example of ...
0
votes
0answers
317 views

Bind - Configure different Forwarders only for Specific Domains CDNs (eg. Wetransfer, Cloudflare, Amazon AWS)

INTRO I've setup a linux box where there's a BIND that serves me as a local dns. Basically by taking advantage of RPZ I can restrict some hosts and at same time with DNSCRYPT I forward everything to ...
2
votes
1answer
672 views

resolve my ip with dig returns empty string

When trying to resolve my public IP address I get an ampty string ip=$(dig +short myip.opendns.com @resolver1.opendns.com)
0
votes
1answer
114 views

Debian 9 allows hidden DNS queries?

In previous Debian Jessie I could configure iptables to restrict DNS traffic to my own router (192.168.1.1): Chain OUTBOUND (1 references) target prot opt source destination ...
-2
votes
1answer
82 views

Tracing DNS request

I have static IP in my Debian Lenny system and ping by IP to Internet works fine. Unfortunately www.google.com is not resolved by name. I can't install any additional software to my Linux since it ...
1
vote
1answer
184 views

Can't get authoritative DNS server working (BIND9)

I'm trying to make a BIND9 DNS server work on a Debian server for an assignment at school. The problem is that, when I try to test my DNS server with dig -t soa my.domain.com @ns.my.domain.com, I just ...
0
votes
1answer
115 views

DHCP DNS and Domain resolution NetworkManager

My environment is following, all cabled with gigalan, all latest Debian 9, vm with virtualbox on 2 different physical hosts. A mikrotik internet router which acts as DHCPD I configured it setting ...
5
votes
3answers
11k views

Can not resolve .local domains internal to my office LAN

On Linux Debian 9 I am able to resolve a specific local domain e.g. my.sample-domain.local using some commands like nslookup or host, but not with some other commands like ping or the Postgres client ...
0
votes
1answer
260 views

Why iptables is flowing? [closed]

I have iptables configuration: # iptables -L Chain INPUT (policy DROP) target prot opt source destination Chain FORWARD (policy DROP) target prot opt source ...
2
votes
1answer
2k views

Question about why DNS resolv.conf stopped working

I have a question about why my DNS settings got messed up. I've fixed the issue (I think), but I'm curious as to why it happened. My Linux Mint 18.3 laptop had been working flawlessly. I recently ...
0
votes
1answer
2k views

How to configure dnsmasq as an authoritative DNS server?

I'd like to setup dnsmasq as an authoritative DNS server, but can't find any good guides for it. So could somebody please post a sample configuration of dnsmasq as an authoritative DNS server (with ...
0
votes
1answer
158 views

Host command successful but DNS won't resolve

I'm trying to complete the setup of my Bind9 DNS server. Both Systems are running Debian Stretch. The serving machine (192.168.0.113) is a VM host and the client machine (192.168.0.104) is its ...
0
votes
1answer
170 views

Killswitch: block all connections except a Dynamic IP VPN (can't use iptables if I don't know the IP)

I have a VPN that I connect to via domain name, not via IP. (with OpenVPN, in Debian) VPN's IP is dynamic, can change any moment, by design, out of my control. I want my machine's only communication ...
2
votes
1answer
1k views

DNS settings not working on lubuntu 17.10

Recently my DNS settings stopped working. They are the same settings I've had for a while now, and I don't know what has changed. Now each time I restart my system, I have no internet connection, ...
1
vote
1answer
509 views

Which configuration file has higher priority for DNS server settings?

For Debian, DNS nameservers can be set both in /etc/network/interfaces and in /etc/resolv.conf. Which file has higher priority for DNS server configuration?
1
vote
1answer
1k views

Is there a DNS cache file in my debian9?

No NSCD , BIND9 ,DNSMASQ installed in my debian9. Can my debian9 store DNS resolve records in the scene. Is there a DNS cache file in my debian9 ? chrome is a application soft in os. chrome://net-...
0
votes
1answer
160 views

Some hosts resolves slowly or does not resolved at all with dnsmasq

I am using corporate VPN to access internal resources. After connecting via Shrewsoft VPN client these internal resources had not been resolving because resolv.conf was always having DNS another than ...
0
votes
2answers
1k views

Order of DNS servers on client given by DHCP

I'm running DNS and DHCP server on debian 8 server within local network. Issue is that clients get nameservers by DHCP server in wrong/not desired order. DHCP server config: subnet 192.168.10.0 ...
1
vote
2answers
205 views

Possible to host a parent and child domain on one bind server?

NB This is a repost of my previous question, which was put on hold, and asked to be reworded for better clarity (hope this makes more sense) I have a single DNS server with bind installed, which I am ...
0
votes
2answers
189 views

Receiving email on a fresh new Debian

I re-installed a fresh clean Debian 8 on my VPS. All is set up to default values. dpkg -s exim4 and dpkg -s postfix says that exim is not installed, and that postfix is installed. This is confirmed ...
1
vote
2answers
3k views

How do I fix IPv6 DNS server settings on Linux Mint 18.x?

OS: Linux Mint 18.2 Cinnamon + Windows 10 Pro; dual-boot. I have just used this web site http://test-ipv6.com/ to check my IPv6 readiness. Results on the Windows 10 Pro: Results on the Linux Mint ...
2
votes
1answer
2k views

Unbound no servers could be reached

I'm about to install a mail server and would like to use local DNS resolution but I tried to install Unbound manually and using Angristan's Unbound installer. All I get when testing using dig @127.0.0....
3
votes
3answers
35k views

How to flush the DNS cache in Debian?

How can I flush the DNS cache in Debian 9.1 with KDE?
1
vote
1answer
5k views

What does “search localdomain” do in resolv.conf?

When connecting to the Internet by default I get two lines in my /etc/resolv.conf file: search localdomain nameserver {ipofmyrouter} I'd like to know what exactly "search localdomain" means there. I ...
1
vote
2answers
6k views

search domain in resolv.conf is not appending to hosts when doing ping or other network communciation

I am trying to find out why multiple search domains do not work with Debian 8.8.0. If you add the search domains in /etc/resolv.conf it will only work with one of them & in this case domain1.local ...
0
votes
0answers
525 views

“Temporary failure resolving 'security.debian.org'” despite having allowed DNS via ufw

So I denied everything except DNS, HTTPS and HTTP in the gufw firewall. ufw status verbose looks good with no DENY for port 53 and only allows at the bottom of it. I even executed sudo ufw allow 53/...
1
vote
2answers
704 views

Change DNS servers but keep DHCP assigning IP address

I would like to change my DNS servers but keep whatever IP address is assigned by the DHCP (which runs on my Huawei HG255s router). I run Debian Testing with KDE 5. Changing resolv.conf doesn't help ...
2
votes
0answers
897 views

Some services on debian 9.0, can not resolve domain names

Recently, after a dist-upgrade to Debian 9.0, I happened to notice that danted (a socks v5 proxy server) and stunnel4 (an SSL/TLS tunneling service) services can not resolve domain names. In danted ...
2
votes
1answer
2k views

Local NS list does not match Parent NS list

I installed a new BIND server "dns4.clicplus.com" which resolves correctly from the local network and externally. The problem is when I test with: # dig @8.8.8.8 dns4.clicplus.com Nothing is ...
4
votes
0answers
888 views

Loss of DNS on BeagleBone Black Debian

We are running a remote application on a beaglebone black in which we regularly report our external ip address retrieved from various external ip services (freegeoip.net, ipinfo.io, various STUN ...
2
votes
1answer
549 views

Why is BIND not automatically trying all nameservers, especially when an IPv6 nameserver is unreachable?

I am running a recursive local name server using BIND on Ubuntu. I have an IPv4 network at the moment. It appears as though BIND defaults to listen for queries and recursively resolve names on both ...
0
votes
1answer
635 views

Network Manager DNS Issues

I'm on Debian Jessie Linux with LXDE. I'm getting some strange behaviors with my networking. I essentially want to disable IPv6, use custom OpenNIC DNS, and network-manager-gnome for wifi management. ...
0
votes
1answer
705 views

set DNS on ppp connection via systemd/dbus busctl

Setup: A debian jessie device connection via ppp to the internet We use systemd-networking and no /etc/network/interface at all. systemd-resolved is used for DNS. Versions: systemctl --version ...
1
vote
0answers
217 views

Accessing external DNS from linux/debian server

I'm having trouble getting a curl response from an external server. I am working on a debian server I did not set up and the external resource (www.example.com) has be configured to not receive ping ...
0
votes
1answer
34 views

Subdomains point to different VPS boxes

I have two seperate vps boxes with vultr.com (one is debian and the other centos), I would like to set it up so two subdomains go to each one. Possible? For example, box 1 would be box1.mydomain.com ...
1
vote
4answers
7k views

Obtain IP from DHCP sever but set DNS servers statically on Debian

I have a Debian system that gets its IP from a DHCP server, with my own bind9 server running on localhost. Every time I boot, I have to write nameserver 127.0.0.1 to /etc/resolv.conf, as the system ...
1
vote
1answer
371 views

DNSCrypt doesn't seem to encrypt queries

I'm trying to setup a DNS cache server on a Raspberry, using Unbound and DNSCrypt. The Raspberry runs the latest Jessie Lite (headless Debian 8). I setup DNSCrypt using this popular script: https://...
4
votes
2answers
1k views

Removing nameserver from resolv.conf

I want my PC (Debian Jessie, running OpenVPN) to only use my VPN DNS. My resolv.conf file looks like this: # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT ...
3
votes
1answer
797 views

NetworkManager corrupted ipv6 dns settings

Today, I started having most web sites failing to load in browsers. Checking my network settings, I discovered those strange settings in ipv6 tab: Switching back to my usual dns for ipv6 (Google's ...
3
votes
2answers
270 views

How to find out nameserver which resolves a particular host name

I'm running Ubuntu 14.04 and I've recently altered some hostname resolving configs. So I'm now trying to optimise them and for that I need to find out which nameservers resolve particular hostnames in ...
0
votes
3answers
136 views

Any other DNS resolvers other than Google or/and OpenDNS [closed]

I am on Debian testing/stretch. I am currently using Google DNS resolvers. There is OpenDNS as well but are there any others that people would recommend apart from these two - [$] cat /etc/systemd/...
3
votes
2answers
886 views

Bind RPZ no effect with Views

I have a DNS server which has two views, one for internal users and one for external (internet for example). I want to config RPZ so that when internal users request (external recursive queries will ...