Questions tagged [dynamic-dns]

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Windows Server Dynamic DNS Updates and tsigSecret

I was instructed by one of the teams to get a "tsigSecret" for one of our DNS Zones in favor of dynamic updates. This is being used by ExternalDNS. I cannot find how to extract\create it ...
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Dynamically register hostnames on DNS server (via DHCP)

I want to set up a small network, where a central DHCP server leases IPv4 addresses to the clients. The clients already have their hostnames set and should advertise those to the central DNS server, ...
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-1 votes
1 answer
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SFTP client connection fails using hostname

I have configured a debian server, hosting a website, for FTPS access using vsftpd. Port 22, SSL enabled. When testing the connection with FileZilla, I successfully connect if I put the server's IP ...
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  • 141
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2 answers
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How can you de-couple DNS server from the AD Domain Controller?

I have an environment where Active Directory Domain Controllers host their own DNS domains (as is common). However we are trying to separate DNS and host it on a standalone server (to eventually move ...
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  • 185
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3 answers
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MX record pointing to a dynamic IP

I'd like to host simple-login on my home Synology server. For this, I have to register an MX record on a domain that points my IP address. However, my internet provider does not guarantee a fixed IP, ...
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Bind9 with dyndns refuses to update one zone, works OK on another with the same key

I have a Bind9 server (RHEL 8.5) in my lab that was working perfectly fine until a couple of hours ago. Then, it stopped updating one of the 2 zones for which I have setup dynamic DNS. The example.com ...
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1 vote
1 answer
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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 ...
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Automate ssh port forwarding using DNS

I have a number of ssh hosts (a dozen), for simplicity host1, host2, etc. I frequently need to forward port, e.g. ssh -L 8888:localhost:8888 host1 ssh -L 8889:localhost:8888 host2 ssh -L 8890:...
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Different users coming through VPN to my service

I have a web service (php, sql etc) running on an AWS account. I have openVPN setup, so users must establish the VPN connection, then the IP address will work. I currently have this set as example123....
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1 answer
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Why does nsupdate fail with "operation canceled"?

I'm trying to dynamically update a DNS server using nsupdate, running nsupdate -k mykey.private -d -v ./my-nsupdate-commands.txt. But I get the error: Communication with 192.0.2.0#53 failed: operation ...
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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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Is there a way to direct traffic coming in on the same port to two different VMs? [closed]

So the basic idea is stated in the question above, but let me explain. I was thinking of hosting a Minecraft server inside a VM (using bridge mode so I can direct traffic to it via port forwarding) on ...
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-2 votes
3 answers
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using a dynamic dns as a name server [closed]

I'm playing with hosting my own website on a residential internet connection. I have a dynamic ip assigned but the isp also gives me a dynamic dns domain name, something like xxx.go.ro . I bought a ...
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How does MS DHCP server decide which DNS server to try to dynamically update?

In MS DHCP, under Scope Properties, on the DNS tab, it says: You can setup the DHCP server to automatically update authoritative DNS servers with the host (A) and pointer (PTR) records of DHCP ...
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Several redundant automatic entries for all DHCP client machine host names in Samba 4 AD DC DNS

We have a Samba 4 AD DC installation wich is also the DNS in our network. It collects entries of all DHCP client machines with their addresses automatically. I can remember to have activated this ...
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Dynamic Dns changing for GCP f1 micro instance

I am quite new to this ordeal. I am trying to host my ghost blog on GCP f1 instance, the point being that I want to host a website free forever (as per the current condition). GCP f1 instance was the ...
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1 vote
1 answer
775 views

Allow connections to apache from a dynamic IP

When setting up an Apache server, it's obviously possible to allow connections from a specific IP address [/range]. I have a dynamic IP and I'm wondering, if I use a DDNS service, whether it's ...
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What is the practical difference between krb5-self and krb5-subdomain in BIND9 update-policy statement?

What is the practical difference between krb5-self and krb5-subdomain policies in BIND9 on update-policy statement while dealing with dynamic DNS updates on zones? From the BIND9 documentation it ...
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NGINX allow directive with domain instead of IP

In Nginx the allow directive (from module ngx_http_access_module) does not seem to work with domains. It just seems to work with IP. Why would that be useful, you ask? Let's say you want your family ...
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1 vote
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ddclient Returns 7000 Error Connecting to Cloudflare

I am setting up DDNS using ddclient. I have searched the web, and nothing seems to help. I looked up examples, and I don't see what's going wrong. I tried using both api.cloudflare.com/client/v4 and ...
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2 votes
1 answer
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Dynamic DNS with Bind9 and BIND_DLZ cannot start?

I have a device running Samba as an Active Directory Domain Controller using BIND_DLZ as a backend. On top of that I am running a secondary device also configured as an Active Directory Domain ...
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1 answer
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timeout issues when connecting to local tomcat server with afraid.org dynamic dns

background i'm working on a very small team to update the css on a struts 2 website. i'm deploying my code to a tomcat server for testing, and the server pulls its data from an oracle database ...
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1 vote
1 answer
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Can I disable dynamic dns update during "realm join"?

When (re-)joining an EL7 system to the AD domain, something somewhere issues a dynamic dns update for $FQDN. How can I suppress that? The sssd.conf itself is pre-populated with [domain/ad.example....
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Domain Name Routing Across Multiple Varying Servers

How can you use one public IP address to host multiple domain names that span across multiple servers in your LAN? Let's say I have 5 web servers, serving 5 different domain names, using 5 different ...
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3 answers
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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 ...
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  • 537
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2 answers
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List dynamically added DNS records

I can't figure out how to list dynamically added DNS records. Lets say I add a record like this: ~$ nsupdate > update add test.domain.com 3600 A 1.2.3.4 > send After this I can look up the sub ...
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ssl (letsencrypt) for the following scheme: server (dynamic ip) -> ddns (no-ip) -> cloudflare -> hostname

My setup is as follows: Dedicated server (Linux) with dynamic IP address NO-IP domain name domain name When I want to access my system (server), I access my domain, which redirects me to my NO-IP ...
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-1 votes
1 answer
482 views

BIND with Dynamic DNS [closed]

I'm using a DDNS service provider for my domain. Because my server is behind a router that changes IP. I have just figure out that I can have a dns server (like BIND) inside my local server and, from ...
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1 vote
0 answers
357 views

DHCP DDNS + Samba AD?

I'm working on moving a small business network away from a Windows Small Business Server. I've set up the active directory using Samba, and it all works well, but I see one potential problem: ...
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0 votes
2 answers
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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. ...
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VPN to dynamic IP behind a Comcast modem

I previously had my Windows server, which handles VPN, on a static IP. However, I just moved and I can only get Comcast (CenturyLink doesn't have fiber into our area yet). And Comcast is all dynamic ...
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-1 votes
1 answer
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NGINX Reverse Proxy to Dynamic DNS

I have a VPS that hosts my personal portfolio. My DNS (*) is set to point to the VPS's IP. I'm also setting up some local self-hosted (Off a NAS in my home) applications such as Cloud storage and sync,...
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0 votes
1 answer
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Nginx reverse proxy arbitrary directory to subdomain

We currently use Nginx as a reverse proxy in front of several IOT devices to access them from outside our internal network. Up until now, I've statically mapped a location to each device's interal IP ...
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4 votes
4 answers
24k views

How to set an IP address in server_name directive, not a domain name?

For some reason NGINX doesn't work if I set a bare IP address in server_name directive: server { listen 80; server_name xx.xx.xxx.xx; # doesn't work server { listen 80; server_name ...
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1 answer
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Virtual machine - DNS hostname problems on Windows Server

I have a Windows Server 2012 R2 in a local domain with an local DNS server running. My clients are configured to use this DNS server. Today, I had the problem with a client that could not log in due ...
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5 votes
2 answers
4k views

How to fully disable Dynamic DNS on Windows Server?

so we're a University campus, and in DNS Manager, all the students phones, tables, etc, are registering their A records in DNS. We don't want them to. Ideally, we'd just have domain joined devices ...
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Restricting Source IP of DDNS Updates

Goal: For a non-Microsoft DHCP server to send dynamic DNS updates on behalf of non-Microsoft domain clients. Question: With a particular zone in a Microsoft DNS server configured for "Nonsecure and ...
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4 votes
2 answers
2k views

Non-secure DNS server - Allow dynamic updates only from DHCP server

I have a standalone DNS server configured for "Secure and Non-Secure" dynamic updates. I also have the DHCP role installed on the same server. How do I ensure that only the DHCP server can update ...
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  • 536
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3 answers
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AD Dynamic DNS Updates not triggering on clients

The problem Recently the computers at our organization moved to a new AD domain, due to a merger. We are having problems getting the clients to dynamically register their DNS records in our AD-...
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0 votes
4 answers
13k views

Resolve Dynamic DNS to internal IP

I am not very familiar with dynamic DNS, and was curious if I could get it to work for a certain use case. I have a few Raspberry Pi's I'm setting up for mocking server setups of applications we use ...
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5 votes
2 answers
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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 ...
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3 votes
1 answer
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Disabling dynamic DNS updates with Group Policy

I am administering a system which for reasons beyond my control have a disjoint DNS namespace. I don't like it, but that's how it is, and I have no way of changing this. The reason is that the servers ...
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-2 votes
1 answer
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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 ...
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1 answer
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Can I define a sub-domain for a record set at my ISP? [closed]

My ISP for home internet is giving me some kind of DNS record that lets me redirect a name to my dynamic IP address, I set something like MYNAME.go.myisp.tld So accessing that domain shows my home ...
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Google app cloud - Redirect to naked domain

I have google app engine application working on my naked domain but I can't find any tutorials on how to redirect the non naked (www) sub domain to the naked domain. It seems only like they build in ...
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1 answer
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Using static records in dynamic zone with Samba and BIND_DLZ

I've deployed Samba4 as AD controller using BIND_DLZ as a backend. It works ok. Now I have a bunch of servers with static IP's, and I would like to resolve them, but I can't find a way to do this. So ...
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2 votes
1 answer
299 views

BIND DNS A Record File

I've been adding about 10 DNS A records a week for the past 2 weeks. After updating a record using nsupdate it occurred to me that maybe I should find a way to separate the DNS A records from the ...
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1 vote
2 answers
5k views

Samba4 and BIND9_DLZ - static records with samba_dnsupdate dynamic dlz

I have some records in bind for my DNS zone. Now I want to configure Samba4 Active Directory which wants to add some dynamic records into my zone. So I include /var/lib/samba/private/named.conf in my /...
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8 votes
2 answers
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Google Dynamic DNS Wildcard Subdomains

I can't get Google's Dynamic DNS API to work for a wildcard domain. I can get defined subdomains to update their IP just fine but I always get nohost when i attempt to update the wildcard's IP. This ...
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1 vote
1 answer
3k views

How to configure dynamic DNS updates when using stateless IPv6 addressing?

I am using Server 2012 with AD/DNS/DHCP. I have successfully configured stateful DHCPv6 however this does not accomplish what I would like to achieve so I disabled it and I'm currently trying to get ...
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