So I have a discussion going on from a company that has its mail marked as spam because of bad SPF. they think the SPF is correct. I disagree. So, smallcompany.com includes the SPF from mothercompany.com. mothercompany.com has an spf with v=spf1 mx -all and that’s all. smalcompany.com uses the mailservers of mothercompany.com but send … Read More “Please, help met with this SPF question. Am I wrong or are they?” »

I have been playing around with dnsdist (by powerdns) and am very impressed. I have it setup in front of a 2 x DNS server and working well. I want to move dnsdist to oracle cloud (free hosting tier) and forward it to another dnsdist in my office that forwards to the two dns servers. … Read More “powerdns dnsdist behind dnsdist” »

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I have this really weird issue with a .co domain of mine, that doesn’t propagate no matter what I do. Its registered with AWS, wich says that DNS works fine, and if I use ~% dig (domain).co (a)ns-195.awsdns-24.com, it resolves correctly. But if I check in with ~% dig +trace (domain).co, I can’t make out … Read More “.co domain doesn’t propagate, can’t figure out why” »

I have 1 AD( which is also the DNS server) and 10 servers connected to it. All servers has 2 network configured to it(2 different ports). AD/DNS Server IP Address: Network 1: 192.168.1.1/24 Network 2: 192.168.2.1/24 10 Servers are domain-joined to the above AD, and also has the 2 networks connected to them. My question … Read More “Multiple DNS issue” »

This is the dnsmasq configuration: #log all dns queries log-queries #dont use hosts nameservers no-resolv #use cloudflare as default nameservers, prefer 1^4 server=192.168.1.152#5300 #serve all .company queries using a specific nameserver server=/local/192.168.1.11#8600 server=192.168.1.46 strict-order while adguard dns is using node with port 5300 but it is not getting picked up instead falling back to 192.168.1.46 … Read More “adguard node dns Non default port not getting picked up by dnsmasq” »

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So long story short – I’ve been assigned to clean up/add the printers in the company I work for and let me just say the current setup is like walking into a library with the books on the floor. We have a working list of printers with either the incorrect name (based off the list) … Read More “Printer DNS is a mess” »

DNS filtering – or Domain Name System filtering to give it its full title – is a technique of blocking access to certain websites, webpages, and IP addresses. The DNS is what allows easy to remember domain names to be used – such as Wikipedia.com – rather than typing in very difficult to remember IP … Read More “How Does DNS Filtering Work?” »