Questions tagged [dynamic-dns]

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How to use an Nginx allow list by dynamic DNS instead of IP address?

I am running an Nginx web server on Ubuntu 20.04. In my virtual host configuration file, I have set an allow/deny directive to block all IP's except the specified IP from accessing a URL. My virtual ...
DanRan's user avatar
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Where does ddns-confgen save its key(s)?

I hesitate to ask this question as I suspect I'm being stupid, but... On Ubuntu server 22.04 running bind 9.18.18, when I run ddns-confgen -k host.example.com, it outputs some instructions referring ...
TommyPeanuts's user avatar
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Bind dynamic DNS: can records be removed or expired automatically after some time

I have a dynamic DNS zone on my Bind 9 server and use nsupdate from a script to update records in it. When a record has not been updated for some time, I would like to remove it. Do I need to manage ...
mivk's user avatar
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DynDNS - Solution for site-to-site VPN's over 5G backup internet?

One of our sites have moved to a new locaiton and I have been battling with the fibre provider to install the new connection at the site. Currently, we run a 5G connection as a backup connection at ...
Francois Botha's user avatar
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How can I do DDNS-like tracking of a remote server without DNS?

I have two servers, one has static IP addresses (the gateway), the other doesn't (the frontend). Tunneled directly │ Over the public network [FRONTEND]...
Vita's user avatar
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How do i enable DNSSEC on NameSilo (using DS records form YDNS)

(First of all i am new to domains in general and DNSSEC). I have tried to enable DNSSEC on NamesSilo for my domain. I only have the ds records in plane text and don't know wich value has to be ...
zip6como's user avatar
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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, ...
a.ilchinger's user avatar
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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 ...
perissf's user avatar
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2 answers
3k views

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 ...
madacoda's user avatar
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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, ...
Benjamin Barrois's user avatar
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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 ...
ptselios's user avatar
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661 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 ...
Impossible's user avatar
1 vote
3 answers
889 views

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:...
Alleo's user avatar
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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....
Andyj12's user avatar
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1 answer
668 views

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 ...
nh2's user avatar
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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 ...
Henri Gehrt's user avatar
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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 ...
Nicholas Hartmann's user avatar
-1 votes
3 answers
686 views

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 ...
unlink's user avatar
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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 ...
Jonathon Reinhart's user avatar
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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 ...
andreas's user avatar
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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 ...
Sandesh Bhusal's user avatar
1 vote
1 answer
2k 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 ...
AJ.'s user avatar
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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 ...
Vinícius Ferrão's user avatar
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446 views

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 ...
Pedro Abrantes's user avatar
1 vote
0 answers
429 views

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 ...
ARI FISHER's user avatar
2 votes
1 answer
2k views

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 ...
Lasse Michael Mølgaard's user avatar
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1 answer
606 views

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 ...
init1312's user avatar
1 vote
2 answers
3k views

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....
bgStack15's user avatar
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3 answers
2k views

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 ...
LonnieBest's user avatar
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2 votes
3 answers
6k 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 ...
Watki02's user avatar
  • 617
2 votes
2 answers
4k views

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 ...
PatricF's user avatar
  • 163
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1 answer
529 views

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 ...
CorellianAle's user avatar
-1 votes
1 answer
601 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 ...
alexandre1985's user avatar
1 vote
0 answers
425 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: ...
Dessa Simpson's user avatar
0 votes
2 answers
94 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. ...
adrianTNT's user avatar
  • 1,149
0 votes
0 answers
78 views

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 ...
David Thielen's user avatar
-1 votes
1 answer
4k views

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,...
Tempster102's user avatar
0 votes
1 answer
1k views

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 ...
Brice Hughes's user avatar
6 votes
4 answers
28k 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 ...
Green's user avatar
  • 177
1 vote
1 answer
1k views

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 ...
bademeister's user avatar
5 votes
2 answers
5k 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 ...
amoreno's user avatar
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0 votes
0 answers
297 views

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 ...
madhatter's user avatar
4 votes
2 answers
3k 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 ...
Monstieur's user avatar
  • 546
1 vote
3 answers
10k views

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-...
Omnomnomnom's user avatar
0 votes
4 answers
16k 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 ...
Joshua Enfield's user avatar
5 votes
2 answers
25k 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 ...
Neurotransmitter's user avatar
3 votes
1 answer
15k views

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 ...
Per von Zweigbergk's user avatar
-2 votes
1 answer
43 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 ...
Rick's user avatar
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0 votes
1 answer
140 views

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 ...
adrianTNT's user avatar
  • 1,149
0 votes
1 answer
380 views

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 ...
Jimmy's user avatar
  • 269