I've just installed Clarkconnect, and plugged in my cable modem. I've also installed BPALogin which is required for my ISP (Telstra BigPond Advanced).

I'm getting various messages - "no route to host", "network is unreachable", "ping check failed", "100% packet loss"

My routing table looks OK, the last line has the default gateway specified as the Telstra gateway, the Metric is 1 and it is bound to the correct interface card (I have 2 NICs).

However, a PING will result in
10.12.1.0 (or something like that) Packet filtered
10.12.1.0 Packet Filtered
10.12.1.0 Packet Filtered
etc.
A CTRL-C will reveal 100% packet loss.

The DNS is working because if I ping ftp.cdrom.com it replies:
Ping wcuarchive.cdrom.com(204.43.23.2)
(I can't remember the exact IP), so it is resolving the name OK.

If I try to FTP I get
ftp: connect : no route to host.

There's nothing in any of the logs I can see which help.
My /etc/resolv.conf has my nameserver and IP address in it.

How can I find out where it's going wrong? /var/log/messages and netwatchd only tell me "ping failed" or "network is unreachable", which I already know.

TIA

Oh yeah, the firewall is set up to allow http,ftp pop3 and a couple of others on the correct ports.

I also couldn't discover the ipchains command to allow all, which I wanted to test to see if it was the firewall causing the problem. I did an ipchains -F and it set the default as REJECT.

If anyone can post the syntax to "allow all" it would save me having to look .

Thanks.

enzoweb,

Don't block all ICMP messages, they are needed by the network for working out fragmentation sizes etc etc.
Only block icmp types, 5,8,9,10,13,17
accept icmp types, 0,3,4,12,15,18,14

To test if your ipchains is the problem try this:

ipchains -F
# Hello world come and hack me its a free for all.
ipchains -P input ACCEPT
ipchains -P output ACCEPT
ipchains -P forward ACCEPT
# firewall rules
# sets timeout vaules for FIN flags etc..
ipchains -M -S 7200 10 60
# NAT setting for MASQing
ipchains -A forward -s your_subnet_range/0 -j MASQ
# example ipchains -A forward -s 10.40.50.0/0 -j MASQ

/Raz