no route to host

vito_huang · 06-12-2005, 01:38 PM

i have two computers with one using redhat fedora core3 and another one using knoppix 4, i try to connect them together using the following commands:

on redhat one:
ifconfig eth0 down
ifconfig eth0 192.168.0.1 broadcast 192.168.0.255 netmask 255.255.255.0
route add -net 192.168.1.0 netmask 255.255.255.0 eth0

on knoppix one:
ifconfig eth1 down
ifconfig eth1 192.168.0.2 broadcast 192.168.0.255 netmask 255.255.255.0
route add -net 192.168.1.0 netmask 255.255.255.0 eth1

these two computers can ping each other, and redhat one can ssh to knoppix one, but the problem is knoppix one can not ssh to redhat one, and can not telnet to any ports, it said something like: there is no route to the remote host.

i also try to add an gateway with
route add default gw 192.168.1.254 eth1(eth0)
but it doesn't make any different.

what is the problem? how can i fixe it?

marghorp · 06-12-2005, 03:24 PM

is it possible to have an IP ending with 0?
192.168.1.0?

rkettle · 06-12-2005, 05:32 PM

quite right, you cannot have an ip ending in 0. Are you using DHCP? What is your gateway? Does it give out DNS?

mcd · 06-12-2005, 06:38 PM

yeah, first question is are you using dhcp. second question is are you behind a router? if you are behind a router, then the gateway ip address you put in has to match your router's ip address. mine is 192.168.1.1 (which is fairly common). so

route add default gw 192.168.1.1

for that. for ip addresses for your two machines, why not stick to the traditional 192.168.1.100 and 192.168.1.101? then at least we can narrow down the problem if it continues.

vito_huang · 06-13-2005, 06:43 AM

the answers are i don't using dhcp and not behind any routers, but why the machine with redhat can ping and ssh to knoppix one, and canot use knoppix machine to any ports???

OneManArmy · 06-14-2005, 10:03 AM

Quote:

Originally posted by vito_huang
the answers are i don't using dhcp and not behind any routers, but why the machine with redhat can ping and ssh to knoppix one, and canot use knoppix machine to any ports???

Make sure that the redhat machine is not running any firewalls which might be blocking
the connection to it. You can know this by running the shell command "iptables -L" on
the redhat machine.

OneManArmy · 06-14-2005, 10:10 AM

I don't know what are you exactly trying to do, but for me I just wanted to connect
two machines directly to copy a couple of files. This meant they needed to be
on the same network.
So specifying the ipaddress and the netmask are enough.
- machine one: 192.168.1.1
- machine two: 192.168.1.2
- netmask for both : 255.255.255.0

Restart the network services and everything should work.