There's a diagram showing how to connect two computers at <http://www.fs-security.com/docs/connection-sharing.php> which describes my setup. I have two computers: arrakis and caladan. Arrakis eth0 is the external interface. Arrakis eth1 is the internal interface. Arrakis eth1 connects to a hub, to which a second computer, caladan is also connected. I'm trying to setup ICS on arrakis. Is the firstarter firewall preventing arrakis from accessing the internet? Every time I do step#1 I can't get on the internet, I have to disable the firewall to get on the internet. What's wrong with the firewall settings, please? step#1 ====== set up DHCP for arrakis eth0, enable ICS. set up DHCP for arrakis eth1. run /etc/init.d/network restart some terminal output afterwards: Thu Jul 14 08:07:58 IST 2005 Shutting down interface eth0: [60G[ [0;32mOK[0;39m ] Shutting down interface eth1: [60G[ [0;32mOK[0;39m ] Shutting down loopback interface: [60G[ [0;32mOK[0;39m ] Setting network parameters: [60G[ [0;32mOK[0;39m ] Bringing up loopback interface: [60G[ [0;32mOK[0;39m ] Bringing up interface eth0: [60G[ [0;32mOK[0;39m ] Bringing up interface eth1: [60G[ [0;32mOK[0;39m ] 00:00.0 Host bridge: Silicon Integrated Systems [SiS] 740 Host (rev 01) 00:01.0 PCI bridge: Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge (AGP) 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS962 [MuTIOL Media IO] (rev 25) 00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2 SMBus Controller 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] 00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] Sound Controller (rev a0) 00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller 00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet (rev 90) 00:09.0 Ethernet controller: D-Link System Inc RTL8139 Ethernet (rev 10) 01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 65x/M650/740 PCI/AGP VGA Display Adapter eth0 Link encap:Ethernet HWaddr 00:0A:E6:A0:24:27 inet addr:192.168.2.175 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: fe80::20a:e6ff:fea0:2427/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4446 errors:0 dropped:0 overruns:0 frame:0 TX packets:5006 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3242779 (3.0 MiB) TX bytes:674792 (658.9 KiB) Interrupt:5 Base address:0xd400 eth1 Link encap:Ethernet HWaddr 00:0D:88:37:FA:22 inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::20d:88ff:fe37:fa22/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:51 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:3508 (3.4 KiB) Interrupt:5 Base address:0xd000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:227 errors:0 dropped:0 overruns:0 frame:0 TX packets:227 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:18324 (17.8 KiB) TX bytes:18324 (17.8 KiB) Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.2.0 * 255.255.255.0 U 0 0 0 eth0 192.168.0.0 * 255.255.255.0 U 0 0 0 eth1 169.254.0.0 * 255.255.0.0 U 0 0 0 eth1 default 192.168.2.1 0.0.0.0 UG 0 0 0 eth0 Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 eth0 step#2 ======= stop the firestarter firewall some terminal output afterwards: Thu Jul 14 08:09:00 IST 2005 00:00.0 Host bridge: Silicon Integrated Systems [SiS] 740 Host (rev 01) 00:01.0 PCI bridge: Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge (AGP) 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS962 [MuTIOL Media IO] (rev 25) 00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2 SMBus Controller 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] 00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] Sound Controller (rev a0) 00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller 00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet (rev 90) 00:09.0 Ethernet controller: D-Link System Inc RTL8139 Ethernet (rev 10) 01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 65x/M650/740 PCI/AGP VGA Display Adapter eth0 Link encap:Ethernet HWaddr 00:0A:E6:A0:24:27 inet addr:192.168.2.175 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: fe80::20a:e6ff:fea0:2427/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4466 errors:0 dropped:0 overruns:0 frame:0 TX packets:5022 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3254930 (3.1 MiB) TX bytes:679030 (663.1 KiB) Interrupt:5 Base address:0xd400 eth1 Link encap:Ethernet HWaddr 00:0D:88:37:FA:22 inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::20d:88ff:fe37:fa22/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:54 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:3708 (3.6 KiB) Interrupt:5 Base address:0xd000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:227 errors:0 dropped:0 overruns:0 frame:0 TX packets:227 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:18324 (17.8 KiB) TX bytes:18324 (17.8 KiB) Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.2.0 * 255.255.255.0 U 0 0 0 eth0 192.168.0.0 * 255.255.255.0 U 0 0 0 eth1 169.254.0.0 * 255.255.0.0 U 0 0 0 eth1 default 192.168.2.1 0.0.0.0 UG 0 0 0 eth0 Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 eth0
