A website is not opening on a computer that's connected via shared connection (not exactly "shared"). Pinging the website gets
Packet filtered message.
The setup of my home network is done by Ubuntu manual:
Master PC: Ubuntu 9.10. eth1 for provider's connection, eth2 for the internal, with dhcp3 that gives IP to the slave pc. My ISP provides internet via VPN: LAN is accessible via DHCP, to get Internet I use
pppd and a script with manual routing with iptables (I don't check the "share this connection" box, it won't work at all this way).
Here's the script:
sudo iptables -A FORWARD -i eth0 -o eth1 -s 192.168.0.0/24 -m conntrack --ctstate NEW -j ACCEPT sudo iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT sudo iptables -A POSTROUTING -t nat -j MASQUERADE
And the iptables rules on the master PC:
Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination ACCEPT all -- 192.168.0.0/24 anywhere ctstate NEW ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED Chain OUTPUT (policy ACCEPT) target prot opt source destination
On this one, I write the website address, and it works perfectly.
Slave PC: Ubuntu 9.04 laptop. Ethernet connection with DHCP. Can't open or ping the website,
packet filtered. The Iptables rules on slave PC are:
Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination
Right now I've seen only www.s7.ru (18.104.22.168) filtered by this issue, and I can't say whether other sites are affected: so far we haven't noticed an issue with any of them.
I've tried some tests and here's what I see:
- nslookup works on both PCs
- ping doesn't work on any ("packet filtered" message)
telnet www.s7.ru 80then
GET /returns a "301 Moved permanently" message from the server on both computers.
- Still, Opera/Firefox can open this website only from Master PC. The slave PC infinitely waits for reply from server.
How can I find the sourse of the problem? (
I guess it's Iptables rule)