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Showing posts from January 2, 2009

Sharing an Internet Connection on Mandriva 2009.0

Sadly and frustratingly, the Mandriva Linux wizard intended to set up Internet sharing, drakgw , is broken* and has not been well maintained. Until they fix it, here's how to do it by hand, assuming that ppp0 is your Internet-facing connection and eth0 connects to your local LAN. Thanks in part to mheanre and the folks at TWUUG . 1. Mandriva uses shorewall as the default firewall. It needs to be told to pass the data we want to allow. Edit the contents of /etc/shorewall/policy to look like this: loc net ACCEPT fw loc ACCEPT fw net ACCEPT net all DROP info all all REJECT info loc $FW ACCEPT - 2. Set up ip-masquerade in the kernel: # echo 1 > /proc/sys/net/ipv4/ip_forward To make this permanent, add the following to /etc/sysctl.conf : net.ipv4.conf.default.forwarding = 1 3. Tell iptables to use NAT: # /sbin/iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE I found that I needed to add that l