Questions tagged [ddns]

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1answer
32 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 ...
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1answer
59 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 (...
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2answers
71 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 ...
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0answers
18 views

Windows Server 2016: Assign distinct hostname to each interface

The DHCP protocol permits a client to request a specific hostname, which then can be updated in DDNS. Is there some way to accomplish this in Windows, registering a preferred hostname for a selected ...
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1answer
175 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 ...
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0answers
41 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 ...
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0answers
102 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
26 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. ...
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1answer
159 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 ...
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1answer
675 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 ...
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1answer
85 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 ...
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1answer
782 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 ...
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0answers
607 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 ...
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1answer
46 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 ...
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1answer
575 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
62 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 ...
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2answers
187 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 ...
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1answer
79 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 ...
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2answers
35 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. ...
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1answer
2k 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 ...
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0answers
200 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 ...
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2answers
843 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 ...
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2answers
2k 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
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1answer
272 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 ...
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2answers
12k views

bind: “nsupdate -l” failed with status “update failed: REFUSED”

I just switched to bind 9.9.5 dynamic DNS feature with semi-automatic manage of DNSSEC entries, the whole process went good and my zone files were updated well, but now I can't update or add entries ...
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1answer
131 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 ...
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1answer
192 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
6k 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
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1answer
174 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
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1answer
446 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 ...
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0answers
503 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 ...
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1answer
128 views

Supporting writes on bind9 failover

I want to set up a redundant DNS based on Bind9, including failover for write operations. I have DHCP dynamically update DNS based on client hostnames, and I need this functionality to continue to ...
1
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1answer
1k views

Digital Ocean and dynamic DNS [closed]

We are migrating production website from AWS to Digital Ocean, and currently our main concern is static IP that DO provides for droplets. In case of droplet failure our static IP address would be ...
1
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1answer
435 views

Multi-homed forward zone DDNS updates always sent out the same network interface

I have a multi-homed server 'dhcp1' with network interfaces '192.168.10.151' (eth0) and '192.168.0.151' (eth1). The machine is attempting to use DDNS with a name server 'ns1' having network interfaces ...
2
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1answer
5k views

ISC DHCP server not dynamically updating DNS

I have an Ubuntu 14.04 server, running an isc_dhcp_server and the bind9 DNS server. Bind acts as a cache, and it maintains the .m domain (and zone) on my local network. The server's address is 10.0.0....
4
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0answers
664 views

Some systems not attempting to register IPv6 reverse

I have a few Windows 2012 systems in my domain that are not dynamically updating their records in the ip6.arpa zone for their assigned IPv6 addresses. I have systems that are publishing their record ...
-1
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1answer
145 views

Public dynamic IP address [closed]

I have buy a domain from http://www.domain.com, but i have problem updating my newly given IP address from ISP every 14h. So i know that DynDNS have this service but i dont know if it work with ...
4
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2answers
20k views

DDNS, BIND and leftover .jnl files

I have configured BIND and ISC DHCPD to work together (using keys for updates). Now it's not that it does not work at all: forward maps etc are most often added. However, very often, for no apparent ...
1
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1answer
3k views

ddns correct setting for dhcpd.conf and ifcfg file with regards to hostname

I have recently set up dynamic dns with ISC dhcpd 4 and bind 9. Everything is working as it should except for a handful of hosts on the network which don't resolve. Upon investigating I found they had ...
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2answers
2k views

Multiple subnets on isc-dhcp-server using ddns with bind9

On my network I have two subnets: 10.100.1.0/24 -> Wired/wireless 10.100.7.0/24 -> VPN Both subnets are served by isc-dhcp-server running on a Debian VM. This same VM runs bind9 for my DNS. ISC-DHCP-...
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2answers
1k views

How to programmatically determine dynamic IP from behind a subnet [duplicate]

Sorry for the noob question, but I'm trying to hack together an ad hoc dynamic dns to reliably connect two machines in different geographic regions. My issue is every command I try (ifconfig, iwconfig,...
1
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1answer
320 views

Multiple DNS mappings for a host via DDNS

I have a network in which DNS is automatically updated with a record for hosts when they get an address via DHCP (isc-dhcp-server & Bind configured with DDNS updates). The DHCP server is ...
0
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1answer
3k views

UFW rules for specific host / dynamic dns

How can I setup UFW (Uncomplicated Firewall) to add rules for specific hosts? Eg. I want to allow SSH only from yourpc.no-ip.org?
0
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1answer
388 views

Dynamic dns service like dyndns.org [closed]

I am trying to setup dynamic dns service (for personal usage). Something similar to dynds.org. Things done so far: - delegated example.org to external dns server in ovh (my box) - setup bind to ...
4
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2answers
15k views

BIND issue: nsupdate unable to update reverse zone

I'm testing my ddns update config (for ISC DHCP hosted on same server) with nsupdate, and while the forward zone updates correctly: # nsupdate > server 127.0.0.1 > key dhcpupdate ...
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1answer
2k views

DDNS client for Windows

I need to manually update BIND DNS from a Windows server. The network team has given my IP address permissions to write to DNS. I'm having trouble finding a good client. I see that nsupdate is a good ...
1
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1answer
540 views

DDNS from Windows/BIND with DHCP keys

Background: We plan to create a SQL AlwaysOn Availability Group cluster across multiple subnets. Therefore we're going to need the Windows 2008 R2 servers in this cluster to be able to update DNS ...
2
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1answer
5k views

Whitelist rule for reject_rbl_client in Postfix?

Is there a way to add an exclusion/whitelist rule (or similar), which would work against reject_rbl_client behavior? I have a postfix service running, with following client restrictions: ...
1
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5answers
3k views

DDNS on subdomains

My website is hosted for me, but I have some other services (like dev sites) I keep on a local machine. With my old ISP (who gave a static IP as standard) I added these serviced to my subdomain. Now ...