GRE tunnels between Cisco and Linux routers using iproute

This article was first written in August 2004 for the BeezNest technical website (http://glasnost.beeznest.org/articles/167). GRE tunnels between Cisco and Linux (2.4 and up) routers are possible. Given the following two routers, each one gateway for its network: linux Public IP:…

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Redirecting ports (NAT) to another machine on a Cisco router

This article was first written in April 2004 for the BeezNest technical website (http://glasnost.beeznest.org/articles/121) Log into the machine (using telnet for example). Change to enable mode. Change to configuration terminal mode: # conf term Issue the following command to redirect…

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Activating the DHCP server in a Cisco router

This article was first written in July 2005 for the BeezNest technical website (http://glasnost.beeznest.org/articles/280). Here is an example on how to configure a DHCP server on a Cisco router. ip domain-name 195.238.2.21 ip dhcp excluded-address 192.168.64.1 ip dhcp excluded-address 192.168.1.7…

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HOWTO Replace a Cisco Remote Access Router with Free Software (ser2net)

This article was first written in April 2005 for the BeezNest technical website (http://glasnost.beeznest.org/articles/224). To replace a Cisco Remote Access Router, which is only a kind of network serial ports server, you could use a Linux box with Serial to…

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Free Softwares related to Cisco

This article was first written in April 2005 for the BeezNest technical website (http://glasnost.beeznest.org/articles/223). To manage a bunch of Cisco routers or equipments, a lot of free software have been written over time. Most of them are really useful to…

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