IP | ISGMLUG

Welcome to our SGML and XML Resource site

Archives

Proxy Protocol Verification


Any circuit level tunneling through a proxy server such as SOCKS or SSL, will allow most protocols to be passed through a standard proxy gateway. Whenever you see a statement like this, you should remember that it implies that the protocol is not actually understood but merely transparently transmits it. For instance, the popular tunneling…

Read More

Some IP Routing Stuff


Conceptually IP routing is pretty straight forward, especially when you look at it from the hosts point of view.  If the destination is directly connected such as a direct link or on the same Ethernet network then the IP datagram is simply forwarded to it’s destination.  If it’s not connected then the host simply send…

Read More

Defining an Internet Address


Absolutely every device that exists on the internet needs an IP address (some call it an internet address). There are no exceptions – every pc, laptop, phone, coffee machine or printer if it’s online and accessible it needs an IP address. Needless to say the internet facing ones have to be unique in order to…

Read More

A Little Bit About IP Checksums


The role of checksums in IP headers is actually very important.  THey are used to make sure that data is not corrupted during it’s journey from the source address to the destination.  TCP/IP uses a specific algorithm to check the data which involves dividing the checksum data in separate 16 bit fields.  Every one of…

Read More

  • Recent Posts