Networking
Articles and howtos for computer networking and Internet applications
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95th Percentile Bandwidth Charging
Posted October 21st, 2007 in Networking
I am currently in the process from moving my sites over from physical servers in a co-location cabinet to a VPS (Virtual Private Server) and moving from 95th Percentile Bandwidth Charging to data charging. My new provider provides "unlimited" domestic traffic and 50GB of international bandwidth on the plan I have selected.
Prevent hostname lookups with openssh sshd
Posted September 5th, 2007 in Linux/Unix/BSD and Networking
When you connect to an OpenSSH sshd server, it is configured by default to do a hostname lookup on your IP address. If there are any issues with the DNS configuration on the host machine, or with the DNS server it is using, this can lead to a delay when logging in using ssh for around 30 seconds. It is very easy to switch this host name lookup function off in the sshd_config file.
Reinstall TCP/IP on Windows XP
Posted August 8th, 2007 in Networking and Windows
After adding a new network interface to my Windows XP computer networking stopped working completely. I uninstalled the McAfee Security Center but that didn't help. This article looks at the steps I did to uninstall and reinstall TCP/IP networking on Windows XP.
Open firewall ports for MSN Messenger and ICQ
Posted February 13th, 2004 in Networking and Windows (Updated June 12th, 2007)
To connect to MSN Messenger and ICQ instant messaging servers through a firewall you will need to open up outbound ports to connect to them. This article describes which ports to open and has an example of how to do it using a Dynalink RTA200 ADSL router.
POP3 Commands
Posted February 13th, 2004 in Networking (Updated February 24th, 2004)
The commands used to retrive mail from a POP3 server by an email client are a series of text commands with single line responses from the mail server. This article lists the most common commands and has an example for using each one in a POP3 conversation
POP3 Commands - RFC 1939 - Post Office Protocol - Version 3
Posted February 13th, 2004 in Networking and RFC - Request for Comments (Updated February 24th, 2004)
The commands used to retrive mail from a POP3 server by an email client are a series of text commands with single line responses from the mail server. This article lists the most common commands and has an example for using each one in a POP3 conversation
Ports used for Windows Virtual Private Networks
Posted February 13th, 2004 in Networking and Windows (Updated May 24th, 2005)
To connect to a remote Windows Virtual Private Network you need to open up TCP port 1723 and IP protocol ID 47. This article explains about this with an example of how to do it using a Dynalink RTA220 ADSL router.
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