Questions tagged [ddns]

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1answer
29 views

Is it possible to have both static and a dynamic A record created for the same host on an internal DNS server?

I am working on a case study related to risks from insecure dynamic DNS updates. Suppose there is an internal DNS configured that has a mix of static and dynamically created addresses. Consider a ...
0
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1answer
44 views

Self-hosted DDNS as part of a consumer product offering (potentially >>1000 sub-subdomains), how? [closed]

I'm developing a product that enables users to run a service at home which is part of a larger network. This service needs to be contacted regularly by a coordination service running in the cloud (on ...
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1answer
173 views

Bind9 refuses key from nsupdate

I have a Bind9 DNS server running (and working!). All the zones were managed manually. I now want to change a zone to be updated automatically. After setting things up i tried nsupdate but it fails ...
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0answers
56 views

DHCP DDNS Updates to secondary DNS sever

I am trying to configure DDNS updates from the ISC DHCP server to the zone that is hosted on the windows server, in the dhcpd.conf I have zone section a below zone example.com. { primary 192.168.0.45; ...
0
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1answer
150 views

SRV record not working properly?

I'm currently dealing with a little problem that routes back to me simply not having a static IP, as my ISP charges a ridiculous sum for that. I have a DDNS in place, which works fine. Except, I'm now ...
0
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1answer
32 views

Windows AD not updating Linux DDNS in hybrid integration

I am setting up a Windows AD server, with a Linux DDNS setup. The Linux DDNS runs perfectly fine as expected. However, when I try to add the AD role to the Windows Enterprise 2019 server, the role ...
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0answers
18 views

I cannot correctly deploy my DDNS test server

from dnslib.server import * class TestResolver: def resolve(self,request,handler): reply = request.reply() reply.add_answer(*RR.fromZone("abc.def. 60 A 1.2.3.4")) ...
0
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1answer
43 views

What is the recommended approach for mapping naked hosted domains through DDNS to www? [closed]

I am hosting a few domains on "mydomain.com". I have created a CNAME mapping for all subdomains (*) to my DDNS entry "[my_name].ddns.net". These are working great. I cannot ...
0
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1answer
34 views

How do I forward a www subdomain through DDNS and use the domain's certificate? - Ubuntu Nginx Let's Encrypt DDNS

I think I am missing something simple, but I just can't see it. I am running the latest Nginx on a home machine running Ubuntu 20.04 version 2. I have pfsense as my router/firewall running on a ...
0
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1answer
741 views

Unable to add forward map SERVFAIL/REFUSED DDNS

I am using bind9 on a primary dns server with two secondary dns servers in a master/slave relationship. I am attempting to implement DDNS but seem to be running into a problem when it comes to adding ...
1
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0answers
36 views

How to set up dynamic DNS for 'host' in isc dhcpd

I have set up a couple of subnets in my network, and in one of these subnets I'm setting up hosts like this: subnet 10.0.0.0 netmask 255.255.255.0 { option ntp-servers 10.0.0.1; option time-...
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0answers
181 views

BIND and DDNS updates, for Let's Encrypt certs

I need a TLS cert for Exim and not a website. For people who do not use webserver, Let's Encrypt provides certs via so-called DNS-01 challenge. It's simple really, a hook script dynamically updates ...
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2answers
57 views

I have no access to router and portforward and i need to run a webserver [closed]

I got some PCs in some different locations with different ISPs and networks with dynamic ip addresses and I have a dynamic dns server that can records new IPs. but there is a problem. ISPs blocked all ...
0
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1answer
56 views

Purchasing a domain name and pointing to a dynamic IP [closed]

I designed a small hardware device that will need to periodically check for updates over wifi. I am looking into getting a proper domain name, as currently I am using one of the free ones from noip ...
0
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1answer
44 views

Access home network machine via hosted subdomain

I would like to be able to use a subdomain of my externally hosted website to access a particular port of a machine on my home network. For example, say my domain is example.com, I would like to be ...
3
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4answers
877 views

in-addr.arpa zone delegation in Bind 9 and Samba 4 as an AD DC with DDNS

Environment and goals In my testing KVM lab I have a virtual network 172.16.50/24, in this network I have got 2 Centos 7 VMs running Bind 9 and ISC DHCP servers: Мастер DNS : controller.wsvirt.home (...
0
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1answer
59 views

Avoid local communication routed outside local network when using public domains

i have set up a server running Nextcloud and some other tools. To be able to access it from outside, i've already set-up DDNS and a DNS Entry for my domain nextcloud.mydomain.com referring to the ...
1
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1answer
49 views

Is it possible to restrict TSIG updates to hosts with a specific prefix in BIND9

I have several windows systems in a Linux network with BIND9 DNS as well as an active directory domain. We do not use the windows domain controllers for DNS. In order to ensure all of the systems are ...
0
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1answer
78 views

VPN Tunneling through Multiple NAT environment

I currently building a DIY surveillance system based off of a QNAP NAS. The NAS will store the data, control the cameras, and act as a VPN Server for external access. I've managed to get all the the ...
0
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1answer
1k views

How to determine secured ipv6 addr and temporary ipv6 addr? Is it secure to use secured ipv6 addr for DDNS and internet aceess?

I'm setting a linux kernel router, how to determine secured ipv6 addr and temporary ipv6 addr?When I run ifconfig on macOS, it will output like this: inet6 fe80::0000:0000:0000:3e7d%en0 prefixlen 64 ...
0
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1answer
616 views

Router (Synology) translates external IP address to internal

My previous CISCO router (from my ISP) has been changed to Bridged mode, because I wanted to use mine (Synology). Afterwards the internet connection and the subnet worked fine, but my (DDNS) FQDN (...
0
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2answers
915 views

sssd dynamically update DNS

I am trying to figure out how to get SSSD to dynamically update DNS for different domains on a per NIC basis. For instance if I have a server named host.corp.example.com that has 2 NIC's. I would ...
1
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3answers
2k views

using (windows) PowerShell to perform a dynamic DNS update with TSIG to a BIND9 server

I run BIND9 DNS servers and allow Dynamic DNS updates from my customers by using a TSIG key. One of my customers uses only a Windows environment, and therefore PowerShell to run scripts. He wants to ...
1
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0answers
48 views

Serverless DDNS in an "AWS Like" cloud?

I am on a closed network, usin a derivative of AWS. I have one VPC in 2 Availability Zones, with a small range of IPs. Many of my VMs have dynamically assigned IPs. Right now, my Puppet Master is in ...
1
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0answers
993 views

Client DNS records not getting updated in Dynamic DNS

I have a RHEL7 machine setup with Dynamic DNS and until few days back it was working fine. However, recently I have started seeing a problem where the DNS records for client machines are not getting ...
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1answer
50 views

D'DNS as Default Gateway [closed]

I need a help! I have router A on 1st location and I have router B on 2nd location - they are miles away !! Can I set DDNS domain name of router A -"server" as default gateway for router B? YES or NO. ...
1
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1answer
560 views

Can isc-dhcp-server update bind running on a non default port?

I'm running the following on the same server: pi-hole, bind9, isc-dhcp-server and cloudflared (for DNS over HTTPS). The order goes like this: Pihole:53 -> Bind9:54 -> cloudflared:5353 I'm now ...
2
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1answer
3k views

Is it possible to have name-resolution from Fortigate and local DNS server?

Can you advise on moving to a hybrid DNS? Currently, all our LAN machines receive their IP address from our Fortigate 60D (each machine is either allocated an IP address from the Fortigate DHCP, or ...
0
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1answer
206 views

Apache https redirect only redirects port

Been banging my head on this one for a while, for some reason Apache refuses to properly implement https redirect. I have tried it using a permanent redirect as well as a mod rewrite and everything in ...
2
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1answer
2k views

nsupdate answering SERVFAIL

i've been trying to set up a domain that can be updated. i'm using bind9, i've used ddns-confgen -a hmac-sha512 -k <keyname> to generate my key, i've added the key in /etc/bind/keys.local key ...
4
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0answers
2k views

BIND: DNS failover and high availability with dynamic updates

I am trying to design a system with 2 servers that act as both DHCP and DNS servers with dynamic updates. I am using ISC DHCP and BIND9. It looks like this. Server1 - DHCP primary and DNS master. IP ...
0
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1answer
168 views

Wildcard subdomain routing from WAN to LAN

My current setup: I don't have a static IP from my ISP, so I run my own ddns on a Google Cloud instance The ddns I'm running is a docker image from https://github.com/dprandzioch/docker-ddns, and I ...
0
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1answer
1k views

ngrok[14746]: Incorrect Usage: flag provided but not defined: -domain

I am trying to create ngrok service in Kali Linux following this link:https://amito.me/2016/09/Building-Your-Own-Ngrok-Service-on-CentOS-7/ leafpad /usr/lib/systemd/system/ngrok.service [Unit] ...
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0answers
210 views

unable to link noip ddns to my kali linux

I registered a domain bookmarks.ddns.net in noip.com website and added to my router => Dynamic DNS Configuration settings Downloaded and installed noip script on kali linux and its changing dynamic ip ...
0
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2answers
432 views

dhcpd rewrite invalid client hostname for ddns

Im using isc-dhcpd and bind9 to do ddns. It is mostly working, but updates from clients with invalid names, like "leif_opo5" or "Danfoss Connect CC" are rejected. I changed the hostname for my phone ...
0
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1answer
139 views

No-IP DDNS to My Domain - What DNS Records Do I Have To Add? [closed]

I have a DDNS set up at "example.ddns.net", which is a fixed address I can always find my own server at - but I can't seem to link it with my domain name. I'm using the domain name providers own ...
0
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2answers
52 views

How can I specify mail "MX" records on the "A" record server

My internet provider automatically creates a dynamic dns that points a name like client120.example.com to my dynamic ip address. I see this is done by replying with a DNS "A" record containing my IP. ...
2
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1answer
5k views

Unable to add forward map ...: SERVFAIL

DHCPD[4.3.5] error: Unable to add forward map from nvhenz710.hen.mentats.us to 172.24.1.31: SERVFAIL no errs in BIND 9.11.1-P2-RedHat-9.11.1-2.P2.fc26 $ groups named dhcpd named : named dhcpd ...
1
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0answers
351 views

Master DNS cannot be resolved when using nsupdate

I want to register a client at a local DNS-Server using nsupdate (Raspbian GNU/Linux 8.0 jessie 4.1.19-v7+) > nsupdate -d > update add lea02.example.local 600 a 10.132.34.32 The Response ...
1
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2answers
1k views

dynamically updating zone subdomains

I'm running a bind9 (9.9.5) DNS-server (on Debian/jessie). I have configured one zone to allow dynamic updates, and would like to add TXT records for specific hosts within that zone. Here's a sample ...
2
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2answers
3k views

How can I connect remotely to our network from behind a double NAT?

Having successfully set up my home office network for remote access via OpenVPN, I would now like to do the same thing at work, however I am double natted. There is a central router maintained by ...
1
vote
1answer
343 views

DHCP removing existing DNS records when asked for leases and none are available

I'm having a problem with my Dynamic DNS and DHCP setup where clients requesting leases when none are available causes a cascading failure where existing clients have their forward and reverse DNS ...
5
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2answers
19k views

bind: "nsupdate -l" failed with status "update failed: REFUSED"

I just switched to bind 9.9.5 dynamic DNS feature with semi-automatic management of DNSSEC entries, the whole process went good and my zone files were updated well, but now I can't update or add ...
0
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1answer
155 views

Juniper SSG5 DDNS https socket creation failed

I have a Juniper SSG5 firewall, Version: 6.3.0r19.0, that is on a dynamic IP. We are using DDNS service from dyndns. The service is supported by the SSG device. There has been no problems getting it ...
0
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1answer
255 views

2 servers behind single IP using DD-WRT and Dynamic DNS [closed]

I current have a single server running at home. I use freedns.afraid.org to route the domain name to my current ip. I wish to setup an additional server on a separate domain. How best to achieve it ...
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1answer
40 views

Multiple Physical (and Virtual) servers (mail, web, etc.) on single link. Can I use DDNS to use top level domains to each box? [closed]

This all started last year when I switched to a LISP based solution for my old "C" address block without the expense of T1 lines. I have a cable link and a dsl link into my Cisco 2800 that then ...
2
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1answer
13k views

DHCP Server Not Registering PTR Records

I've got a DHCP server that's configured to "Always dynamically update DNS records". Unfortunately, it's not doing its job. The client sends an Option 81 with its FQDN and all flags at 0. The ACK back ...
1
vote
1answer
198 views

Expose a machine on the far side of a VPN

We're using a VPN to connect a remote office to our main office, and a machine in the remote office needs to expose port 22 to the outside internet. Complications: The main office has a fixed IP ...
1
vote
1answer
477 views

Asterisk and FXO issue over DDNS

I've been experimenting with asteriskNow (freePBX/asterisk 11) as a sip server with DDNS. Everything seems to be working fine using externhost and such; calls to remote extensions to and from asterisk ...
0
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0answers
569 views

Cisco 3560-X and Bind9 DDNS integration

Experts, In an infrastructure I'm currently working on, we have one Cisco 3560-X as a core switch and an internal Bind9 DNS server. The 3560 is acting as the DHCP server. BIND9 currently has names of ...