May 2008 Archives
I'm enabling ivp6 for all dns addresses now. Let me know if I broke something.
1-877-4FESLER if it's urgent.
This blog will have a green header if you're visiting from ipv4, and a blue header from ipv6.
This blog will have a green header if you're visiting from ipv4, and a blue header from ipv6.
I've made some changes on the system; more are coming. Specifically so far:
- goat.gigo.com is now accessible on ipv6.
- irc.gigo.com is now accessible on ipv6.
- mail primary MX is on ipv6; secondaries will be soon.
- I changed from djbdns to bind. Lemme know if you see anything funky. If you edit zones here on gigo.com, I'll only install them if it passes a basic "will it load" test (using named-checkzone).
- ns3 and ns4.gigo.com are deprecated; they are currently aliased to ns1.gigo.com
- I'm not publishing IPv6 NS records - waiting for word on whether I can get "glue" records published to .com for that.
I'm in the process of simplifying my DNS setup. I'm reducing the number of DNS servers I maintain down to two. Most of the domains are hosted by me for web/email as well - and if the host is down, the DNS isn't gonna matter quite so much. If *.gigo.com servers are hosting your dns domain, please update your domains to point at these two name servers:
- ns1.gigo.com (Located in Fremont, CA using HE.NET)
- ns2.gigo.com (Located in Sacramento, CA using CWO.COM)
I will still keep ns3 and ns4 around, but they won't be unique from the first two.
Continue reading Do I host your DNS?.
"telnet" is a program that lets you make an unencrypted login to another host on an arbitrary port. It is a useful testing tool, for making sure that the firewall you're working on is working; or for making sure the service you are working on is answering.
Normally you give it a hostname and a port number. Simple.
Only, with apple, if you give it port 25 ("SMTP"), it decides not to do a regular host to IP lookup, but instead... does a MX record lookup. As in, it goes somewhere other than where you told it to go.
Jason-Feslers-computer:~ jfesler$ telnet gigo.com 22
Trying 216.218.228.114...
Connected to gigo.com.
Escape character is '^]'.
SSH-2.0-OpenSSH_4.5p1 FreeBSD-20061110
^]
telnet> close
Connection closed.
Jason-Feslers-computer:~ jfesler$ telnet gigo.com 25
Trying 216.218.228.118...
Connected to mx2.gigo.com.
Escape character is '^]'.
220 goat.gigo.com ESMTP secondary mx only defers/rejects. postmaster@gigo.com
^]
telnet> close
Connection closed.
Jason-Feslers-computer:~ jfesler$
Update: This happens for ssh, nc as well. As it turns out, Apple's doing this on quite a bit..
