Problem zmena ip adresy - treba editovat /etc/sysconfig/network-scripts/eth0-ifcfg alebo tak nejak

Problem pomaly telnet vdaka nefunkcnemu DNS dlho trva kym sa user prihlasy
riesenie editovat /etc/nsswitch.conf a riadok hosts

Networking

Networking actualy consist only of three important things
1. kernel support
2. adding net device
ifconfing eth0 199.100.199.2
or
ifconfig lo 127.0.0.1
3. adding route
route add -net 199.100.199.0
that's it

Addning route to host with different mask an addr, but on the same physicall ethernet
route add -host  gw 
you have to do the same on the peer machine
route add -p 192.1.1.0 mask 255.255.255.0 199.100.199.254

But Linux is cool and you can use this
route add -net 10.1.0.0 netmask 255.255.0.0 gw intranet
to get to 10.1 net through your own ethernet's ip addr

Doing the above under NT
route add  mask 255.255.255.255 

packages needed for enhanced networking
netkit-base	ping, inetd
finger		finger
tcp_wrappers	tcpd pre inetd
telnet		telnet

RPC
portmap		for rpc connections
rwall		for sending remote messages; walld/1 dgram rpc/udp wait.max nobody /usr/sbin/tcpd rpc.rwalld

IP aliasing
kernel support or module ip_alias.o
ifconfig eth0:0 199.100.199.25 #eth0:x 0,1,2,3... possible dev 
route add -host 199.100.199.25 dev eth0:0

Doing this under RH5.0  In /etc/sysconfig/network-scripts/
copy ifcfg-eth0 to ifcfg-eth0:0 and modify relevant parts on the same subnet
this would only be DEVICE and IPADDR

the redirect thing
ifconfig eth0:3 206.191.41.133 netmask 255.255.255.240
ipmasqadm portfw -a -P tcp -L 206.191.41.133 80 -R 192.168.0.136 www