Pinging uses the ICMP protocol. Make sure you have that enabled if you want to ping. IIRC Firewalls often disable it due to Denial of Service attacks.
I tried Shorewall on my standalone system with an unused ethernet card. It closed down everything. No need to reinstall though, Control Centre: Allow Everything switches it off. On my second attempt I listed the iptables generated by the Allow Nothing setting. Nothing should be that complex - especially when it seems to decode as Nothing In - Nothing Out. As soon as I move house and get more time on the system I'm going to be coding the iptables by hand from scratch. The Network Administrator's Guide has a useful chapter on it. -- Richard Urwin, Private "No 9000 series computer has ever made a mitsake or corrubiteddatatato." -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of magnet Sent: 26 November 2002 06:15 To: [EMAIL PROTECTED] Subject: [linux] [newbie] Shorewall - Grrrrrr!!! Hi all, After many installs and messing about regaining some usability of this system and network, I used Control Center to install and activate the Internet Sharing across the network. As before, it installed Shorewall, which has been the #1 culprit in causing all these reinstalls as it just shuts the machine down re: internet usage. So I'm turning to the wisdom of the list once more for some serious help in getting this horrible piece of "protection" to actually work for me and not against me. I've googled the problem looking for advice but so far am just coming up with results about it being a new feature (M$ jargon for software that doesn't work?) of Mandrake 9.0, and very little on deep explaination of configuring it using vi to allow all 6 machines to access the internet via main gateway machine. I am using the standard IP range 192.168.0.XXX format for all machines here: 192.168.0.1 linux1 mdk 9.0 (gateway modem) 192.168.0.2 linux2 mdk 8.2 192.168.0.3 linux3 mdk 8.2 192.168.0.4 linux4 mdk 8.2 192.168.0.5 linux5 mdk 8.2 192.168.0.6 linux6 mdk 8.2 192.168.0.253 laptop Windblows ME As soon as I installed it, local machines went off-line and samba was also blocked across the network. I have followed the recent posting "Ports to keep open for samba?" and have edited the shorewall rules file to match for now. I still have internet access/browsing/email from the fw machine but local network is still offline. I went to the laptop and tried pinging the other machines, all responded except the fw machine. I have tried pinging from fw machine to the others but it just times out. Any help will be appreciated on how to get this firewall working correctly. Regards magnet ________________________________________________________________________ This email has been scanned for all viruses by the MessageLabs SkyScan service. For more information on a proactive anti-virus service working around the clock, around the globe, visit http://www.messagelabs.com ________________________________________________________________________
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