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Questions tagged [ddns]

100 questions
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tcpdump and dynamic dns update

So here we have an example of why google is scared.... asking google to find the specific recipe for "what is the tcpdump incantation to sniff / filter only for ddns update packets" winds up with a billion pages of stuff not related to what I'm…
chris
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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 dhcpd : dhcpd named selinux permissive tcpdump looks…
Robert Strickler
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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 the company that run our building, with Ethernet…
Richard Lapthorn
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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 from the server does not contain Option 81, and…
bshacklett
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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 '192.168.10.131' (eth0) and '192.168.0.131'…
jerry
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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 10.0.0.1, and its FQDN is server.m. The problem is that…
derabbink
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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: smtpd_client_restrictions = permit_mynetworks, …
Laimoncijus
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Automatic subdomain wildcard for DHCP-DDNS additions (windows server)

We're running a Windows Server 2008 AD serving as DHCP and DNS for more than 300 PC. When a PC desktop with the name "harry" connects to the network, the DHCP server gives it a lease, and adds appropriate A & PTR records via Windows DHCP+DNS. This…
BorisHajduk
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DDNS Not Creating Journal (Dhcpd and Named)

* EDIT 1 * After monkeying with additional debug logging I see some log entries of interest. 27-Jul-2012 23:45:26.537 general: error: zone example.lan/IN/internal: journal rollforward failed: no more 27-Jul-2012 23:45:26.537 general: error: zone…
user130094
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Resolving real IP address out of a dynamic dns address

I recently opened a dynamic dns user (at no-ip for that matter..) for my own personal needs and especially for ssh-ing my computer whenever I need to, without knowing it's static IP. My questions are: Am I misusing the concept of dynamic dns? Are…
stnr
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Windows Server 2008 DNS Issues with Internet Sites

We are having trouble with DNS. I recently switched internet providers and the problem followed us, at which point I realized our 2008 R2 Domain Controller's DDNS must be the problem. I switch to google DNS (8.8.8.8) and sites like paypal.com,…
Jessica Moyer
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How do I prevent 'net ads join' from doing DDNS update?

I'm using 'net ads join' to add Linux servers to an AD domain. The servers are multi-homed, with a public IP on eth1 and a non-routable private background network on eth0 (in the 172.20 space, used for netboots and installs and stuff -- no routing…
genehack
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Automatic subdomain wildcard for DHCP-DDNS additions?

I'm running dhcp-4.0.2 server and bind-9.6.1-P3. When a new Mac OSX DHCP client with the name "harry" connects to the network, the DHCP server gives it a lease, and adds appropriate A & PTR records via DDNS. This works fine; harry.my.domain points…
Igor Clark
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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 registered in DNS, I have deployed a script to…
ACiD GRiM
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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 use PowerShell to send dynamic updates to my…
Watki02
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