Re: problems with (perhaps) IPMASQ
Try on B:
cat 1 > /proc/sys/net/ipv4/ip_forward
;)
Sincerely,
wanderlust
У ср, 2008-01-23 у 10:13 +0100, Carlos Enrique Carleos Artime пише:
>
>
> Hello!
>
> I have a home network with three computers (A, B and C).
>
> Computer A has a direct connection to internet by a cable-modem.
> It has interfaces:
> - eth0 to internet, uses DHCP
> - eth1 to computer B, static IP-address: 192.168.0.2
> Its operating system is Debian etch, with default
> IPMASQ configuration. I added:
> route add -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.0.1 eth1
> to /etc/init.d/bootmisc.sh (first) and to /etc/init.d/ipmasq (then)
> (without that "route add" it does not work either).
>
> Computer B is connected to both A and C.
> Its interfaces:
> - rl0 to computer A, IP 192.168.0.1
> - ural0 to computer B, IP 192.168.2.1
> It runs FreeBSD 6.3, configured while install to be gateway (but no
> firewall).
>
> Computer C is connected to B. Interface:
> - ural0 to computer B, IP 192.168.2.2
> It has FreeBSD 6.3 and OpenBSD 4.0.
>
> =========================================================================
>
> Present situation:
>
> Ping from B to C 192.168.2.2 success.
> Ping from C to B 192.168.2.1 success.
> Ping from C to B 192.168.0.1 success.
> Ping from B to A 192.168.0.2 success.
> Ping from B to anywhere in internet success.
> Ping from A to B 192.168.0.1 success.
> Ping from C to A 192.168.0.2 failed (host is down).
> Ping from A to B 192.168.2.1 failed:
> knoppix@A:~$ ping 192.168.2.1
> PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data.
> ping: sendmsg: Operation not permitted
> ping: sendmsg: Operation not permitted
>
>
> Does anybody know where the problem is?
>
> The aim is for C to be able to connect to internet (for now, I run an
> X server in C, ssh from C to B, and run applications in B displaying
> in C).
>
> I read documents about IPmasq and IPtables, but understood not enough.
> I tried examples in /usr/share/doc/ipmasq/examples/basics but failed.
> I added the "route add" line after reading FreeBSD manual on routing.
>
> Many thanks for your time and help :-)
>
>
> ===================================================================
>
> Jen plia informo:
>
> knoppix@A:~$ /sbin/route -n
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use Iface
> 192.168.2.0 192.168.0.1 255.255.255.0 UG 0 0 0 eth1
> 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
> 85.152.88.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0
> 0.0.0.0 85.152.88.254 0.0.0.0 UG 0 0 0 eth0
> root@A:~# iptables -L INPUT
> Chain INPUT (policy DROP)
> target prot opt source destination
> ACCEPT 0 -- anywhere anywhere
> LOG 0 -- loopback/8 anywhere LOG level warning
> DROP 0 -- loopback/8 anywhere
> ACCEPT 0 -- anywhere 255.255.255.255
> ACCEPT 0 -- 192.168.0.0/24 anywhere
> ACCEPT !tcp -- anywhere BASE-ADDRESS.MCAST.NET/4
> LOG 0 -- 192.168.0.0/24 anywhere LOG level warning
> DROP 0 -- 192.168.0.0/24 anywhere
> ACCEPT 0 -- anywhere 255.255.255.255
> ACCEPT 0 -- anywhere cm-85-152-88-242.telecable.es
> ACCEPT 0 -- anywhere 85.152.91.255
> LOG 0 -- anywhere anywhere LOG level warning
> DROP 0 -- anywhere anywhere
> root@A:~# iptables -L OUTPUT
> Chain OUTPUT (policy DROP)
> target prot opt source destination
> ACCEPT 0 -- anywhere anywhere
> ACCEPT 0 -- anywhere 255.255.255.255
> ACCEPT 0 -- anywhere 192.168.0.0/24
> ACCEPT !tcp -- anywhere BASE-ADDRESS.MCAST.NET/4
> LOG 0 -- anywhere 192.168.0.0/24 LOG level warning
> DROP 0 -- anywhere 192.168.0.0/24
> ACCEPT 0 -- anywhere 255.255.255.255
> ACCEPT 0 -- cm-85-152-88-242.telecable.es anywhere
> ACCEPT 0 -- 85.152.91.255 anywhere
> LOG 0 -- anywhere anywhere LOG level warning
> DROP 0 -- anywhere anywhere
> root@A:~# iptables -L FORWARD
> Chain FORWARD (policy DROP)
> target prot opt source destination
> ACCEPT 0 -- 192.168.0.0/24 anywhere
> ACCEPT 0 -- anywhere anywhere state RELATED,ESTABLISHED
> LOG 0 -- anywhere 19
>
> ____________________________________________________________________________
>
> Carlos Enrique Carleos Artime FidoNet-poshto: 2:341/14.79
> Dep-to de Statistiko kaj Plejbonigo, Retposhto: carleos@uniovi.es
> kaj Matematika Didaktiko Telefono: +34 985 181 904
> Universitato Oviedo - Asturio Adreso: EUITIndus 33203 Hispanio
>
>
> __________________________________________________________________________
>
> Departemento pri Statistiko kaj Plejbonigo, kaj Matematika Didaktiko
> Universitato Oviedo - EUITIndus 33203 Hispanio - 2:341/14.79@fidonet
>
>
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