been looking into the probability of the firewall on the ubuntu machine causing this
well by what i read ubuntu has a firewall by default closing all ports unless they are opened from the inside so am looking into that because i read that there is more than one way of dealling with it, The following is what is in the terminal after I did sudo ifconfig eth0 up on the TC machine:
tc@box:~$ sudo ifconfig eth0 up
ifconfig: SIOCSIFFLAGS: No such file or directory
tc@bax:$ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1): 56 data bytes
ping: sendto: Network is unreachable
tc@box:~$
well am thinking that it's the firewall on the ubuntu side that is causing this
something about an ubuntu application called 'ufw' and it's rules and also changing #nat table rules by uncommenting some things. this is from the man pages:
First, packet forwarding needs to be enabled in ufw. Two configuration files will need to be adjusted, in /etc/default/ufw change the DEFAULT_FORWARD_POLICY to “ACCEPT”:
DEFAULT_FORWARD_POLICY="ACCEPT"
Then edit /etc/ufw/sysctl.conf and uncomment:
net.ipv4.ip_forward=1
It is about something called IP or subnet source masquerading again this is from the man pages.
ufw Masquerading
IP Masquerading can be achieved using custom ufw rules. This is possible because the current back-end for ufw is iptables-restore with the rules files located in /etc/ufw/*.rules. These files are a great place to add legacy iptables rules used without ufw, and rules that are more network gateway or bridge related.
which looks like a really good setup as a firewall so i want to keep that going and work with it and need to do some reading and see what i can change to make this work properly.