101–110 of 128 posts
Why anyone would want to write DNS server (=something that needs to be very fast) in Javascript is beyond my comprehension. The ASCII art is probably better work than the DNS server.
I have a dd-wrt router with DNSmasq functioning as the DNS server for local hosts. DNSmasq resolves external domains using Google DNS (8.8.8.8/8.8.4.4). With this setup, domain names like 192.168.X.X.xip.io and 127.X.X.X.xip.io won't resolve, and I believe there is something wrong with my DNSmasq setup. Anyone else ran into similar issues? (Update) Problem solved by myself. The DNSmasq config has stop-dns-rebind opti…
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> For example, with XMPP servers, multi-user chat and any components must live on a subdomain. This is only necessary if you want users outside your domain to access your component. While you probably want to do so for MUC, you might not necessarily want to bother for your user directory or gateways. I've run many servers over the years and long since stopped creating a host/subdomain for each component.
Interesting, this must be a shortcoming of OpenFire then. With OpenFire I haven't found a way around having the MUC and extension subdomains accessible via DNS, regardless of whether or not requests are coming from the same domain or not. Is this not necessary with other XMPP servers? Which ones are you using, if I may ask?
As far as the XMPP protocol is concerned, the concept of sub-domains doesn't matter. It's useful for human users when configuring servers though.
Prosody for example allows running a multi-user chat service on example.com. And there's an undocumented feature which let's you have user@example.com be a user, and room@example.com be a chatroom.
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I find it interesting that we are required to do a second round-trip for the CNAME when it is available in the same bailiwick and could be sent as part of either the ADDITIONAL SECTION or as part of the ANSWER SECTION. Would you happen to know what the RFC has to say on this? I understand that CNAME's are not allowed to exist with other records, but returning it in the ADDITIONAL SECTION shouldn't be a cause for conc…
Once a CNAME exists for a name, no record of any other type may exist for that same name (it's an override for all types). But for a query like this, a server is allowed to return both a CNAME and its relevant target(s) ... as long as they are within-bailiwick. It can go right into the answer section, e.g.; % dig example.allcosts.net @ns-22.awsdns-02.com. ... ;; ANSWER SECTION: example.allcosts.net. 300 IN CNAME at.a…
I've identified several technical problems with this domain, and this isn't an example of how to properly operate DNS. 37signals is setting an absurdly low TTL on these records (10 minutes; the answers never change, I absolutely do not understand the logic behind this TTL), which means every 10 minutes you're re-resolving a local address , through a CNAME (so two DNS round trips, and in my case this resolution took b…
Hopefully they will solve this problem at some point, but if you want an alternative fast, couldn't you consider using services like dyndns, noip, etc?
You can run it:
avahi_publish.py service1 service2
curl http://service1.local:8000/bla
Couldn't you accomplish this with djbdns' dnsrewrite or pdns_recursor's lua scripting? Why anyone would want to write DNS server (=something that needs to be very fast) in Javascript is beyond my comprehension. The ASCII art is probably better work than the DNS server.
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Once a CNAME exists for a name, no record of any other type may exist for that same name (it's an override for all types). But for a query like this, a server is allowed to return both a CNAME and its relevant target(s) ... as long as they are within-bailiwick. It can go right into the answer section, e.g.; % dig example.allcosts.net @ns-22.awsdns-02.com. ... ;; ANSWER SECTION: example.allcosts.net. 300 IN CNAME at.a…
In fact, returning both the CNAME and the A in the initial response is required. Returning just the CNAME and setting NOERROR tells a recursor 'the target name exists but I do not have an A record for it'. Luckily, all recursors I am aware of are stubborn and will then ask for the A anyway.
Although RFC1034 outlines that a server typically would do that, it also says that it shouldn't include data that it's not authoritative for.
So a conflict arises when you CNAME to a sub-delegated child zone. E.g.
foo.example.com IN CNAME baz.example.com
However baz.example.com may itself be delegated to other nameservers, and so is "really" out of bailiwick. But the response won't signal this to resolvers at this stage (though in theory could via the additional section).
The simplest reason why resolvers ignore it though is that there's no SOA in the response from which to derive the negative caching time - so it wouldn't know how long to cache that non-existence - and almost all resolvers are caches.
I've identified several technical problems with this domain, and this isn't an example of how to properly operate DNS. 37signals is setting an absurdly low TTL on these records (10 minutes; the answers never change, I absolutely do not understand the logic behind this TTL), which means every 10 minutes you're re-resolving a local address , through a CNAME (so two DNS round trips, and in my case this resolution took b…
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How are you going to add an entry to the hosts file on an iPhone?
Buy (or dig out of your closet) an old Wifi router and install Tomato on it. Its web interface lets you edit its hosts file which is then active for all the devices connected to it.