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:
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 termIssue the following command to redirect port 22/tcp from the outside interface (address) to the inside machine you would like the connection to get to:
(config)# ip nat inside source static tcp 192.168.0.7 22 222.221.220.68 22First IP is the inside local IP address (inside the LAN, only reachable locally, so interna
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 ip dhcp pool DHCPPool import all network 192.168.64.0 255.255.255.0 dns-server 195.238.2.21 195.238.2.22 default-router 192.168.64.253 option 150 ip 10.31.1.107Note that the DHCP pool is 192.168.64.0/24 and that there are excluded addresses.
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 Network Proxy (ser2net).
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.