Jorge Martinez de Salinas » Networking

Send mail from the command line on Mac OSX

admin — Wed, 02 Sep 2009 14:55:45 +0000

I’ll be using my Gmail account to send mail. The first step is to configure the local Postfix server as a relay. Edit /etc/postfix/main.cf: sudo vim /etc/postfix/main.cf Search for a “relayhost=” line and add the following after it: relayhost = smtp.gmail.com:587 smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = smtp_sasl_local_domain = yourdomain.com #smtpd_sasl_application_name = smtpd [...]

First registered domain name

admin — Tue, 01 Sep 2009 09:33:37 +0000

Have you ever been curious about the first registered domain name? Well, it was symbolics.com.

Setting up OpenSSH public key authentication

admin — Mon, 31 Aug 2009 07:35:45 +0000

First upload your public key to the server you want to log in: scp .ssh/id_rsa.pub user@1.2.3.4:/home/user On the server, add the public key file to the authorized_keys file: cat id_rsa.pub >> .ssh/authorized_keys Now you can login using public key authentication and you don’t have to enter a password anymore.

DNS query to find mail servers

admin — Fri, 28 Aug 2009 07:47:22 +0000

To find which servers handle mail for a particular domain use dig: # dig google.com MX ;; QUESTION SECTION: ;google.com. IN MX ;; ANSWER SECTION: google.com. 561 IN MX 100 google.com.s9a1.psmtp.com. google.com. 561 IN MX 100 google.com.s9a2.psmtp.com. google.com. 561 IN MX 10 smtp1.google.com. google.com. 561 IN MX 10 smtp2.google.com. google.com. 561 IN MX 10 [...]

Video streaming with VLC

admin — Thu, 02 Jul 2009 08:20:24 +0000

This post explains how to stream video with VLC from the console.

Setting up an IPv6 Bind DNS Server on Linux

admin — Thu, 02 Jul 2009 08:00:05 +0000

This post explains how to set up a DNS Name Server with direct and reverse IPv6 resolution.

IPv6 addressing explained

admin — Wed, 01 Jul 2009 13:42:23 +0000

IPv6 addressing explained. Stateless, stateful. Anycast, unicast, multicast, link-local, site-local, global ...

Setting up Ethernet 802.1X Port Based Authentication on Linux

admin — Wed, 01 Jul 2009 13:25:57 +0000

How to set up IEEE 802.1X authentication for Ethernet networks on Linux.

Enable IPv6 routing on Linux

admin — Wed, 01 Jul 2009 12:59:15 +0000

How to enable IPv6 routing on Linux boxes.

WordPress Complete Backup Solution

admin — Tue, 23 Jun 2009 22:05:23 +0000

How to backup your WordPress installation (database + files). Also how to restore the backup.