Trying to rebuild a firewall system. Cannot connect/ping anything.
by rnturn from LinuxQuestions.org on (#6JSZF)
Following a mysterious hardware glitch that rendered my Slackware 14.2 firewall unbootable, I re-installed using 15.0. Now... I find that I cannot get a connection from the firewall system to the LAN or to the Internet. I'm seeing a lot of connection failures that are likely default route problems. Unfortunately, the online FAQs and HOWTOs for Slackware appear to be woefully outdated. (Forget about TLDP---many/most links are 404 pages at iBiblio; some have been defaced and are porn sites).
Here's the configuration I have to work with:
eth0 is the internal net interface: 192.168.13.1
eth1 is the internet interface: 1.2.3.45 (static IP supplied by ISP; those first three octets are fake)
The information on the ISP's router specifies a gateway of: 1.2.3.1. There is no net mask information provided (I assume it's 255.255.255.254.
There is also a subnet address provided that, frankly, I have no idea what it's for (I don't recall from the 14.2 installation days -- a few years and two household moves since then -- any notes I made back then are not available) whether that played a part in Slackware's net configuration).
Where the network configuration stands right now is that eth0 has the 192.168.13.1/24 address assigned, eth1 has the 1.2.3.45/31 address (mask is an assumption on my part) and the default route is aimed at eth0. I cannot ping anything internally without getting a "Destination Unreachable" error message.
(Sorry I can't post actual config settings as I'm posting via the ISP's wifi connection and currently can't grab terminal output from the firewall.)
Anyone got any ideas where my configuration has gone awry? Or got a link to more up-to-date Slackware network configuration documentation?
Any pointers greatly appreciated.
Here's the configuration I have to work with:
eth0 is the internal net interface: 192.168.13.1
eth1 is the internet interface: 1.2.3.45 (static IP supplied by ISP; those first three octets are fake)
The information on the ISP's router specifies a gateway of: 1.2.3.1. There is no net mask information provided (I assume it's 255.255.255.254.
There is also a subnet address provided that, frankly, I have no idea what it's for (I don't recall from the 14.2 installation days -- a few years and two household moves since then -- any notes I made back then are not available) whether that played a part in Slackware's net configuration).
Where the network configuration stands right now is that eth0 has the 192.168.13.1/24 address assigned, eth1 has the 1.2.3.45/31 address (mask is an assumption on my part) and the default route is aimed at eth0. I cannot ping anything internally without getting a "Destination Unreachable" error message.
(Sorry I can't post actual config settings as I'm posting via the ISP's wifi connection and currently can't grab terminal output from the firewall.)
Anyone got any ideas where my configuration has gone awry? Or got a link to more up-to-date Slackware network configuration documentation?
Any pointers greatly appreciated.