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Re: networking help (routing table and iptables)



On Fri, Nov 06, 2009 at 06:08:00PM -0500, H.S. wrote:
> Alex Samad wrote:
> > On Fri, Nov 06, 2009 at 04:35:58PM -0500, H.S. wrote:
> 
> >> I have this routing table:
> >>> /sbin/route -n
> >> Kernel IP routing table
> >> Destination     Gateway     Genmask         Flags Metric Ref    Use Iface
> >> <MyWANIP>       0.0.0.0     255.255.255.255 UH    0      0        0 ppp0
> >> 192.168.5.0     0.0.0.0     255.255.255.0   U     0      0        0 ath0
> >> 192.168.1.0     0.0.0.0     255.255.255.0   U     0      0        0 eth1
> >> 192.168.0.0     0.0.0.0     255.255.255.0   U     0      0        0 eth0
> >> 0.0.0.0         0.0.0.0     0.0.0.0         U     0      0        0 ppp0
> >>
> >>
> >> Does this look good to the networking gurus here? I am not sure what to
> >> make of the last line.
> > 
> > last line is defining the default gateway - where to send packets when
> > it doesn't have a local route.
> > 
> > also try using 
> > 
> > ip route 
> 
> Yes, more explanation here.
> > ip route
> 206.248.154.122 dev ppp0  proto kernel  scope link  src 69.196.173.66
> 192.168.5.0/24 dev ath0  proto kernel  scope link  src 192.168.5.1
> 192.168.1.0/24 dev eth1  proto kernel  scope link  src 192.168.1.10
> 192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.1
> default dev ppp0  scope link
> 
> So that last line of the route command output earlier is present in all
> home router then?

depends, if you have configured a default route then yes, if not then
no.

you could trick it with something like (try this)

ip r d default
ip r a 0.0.0.0/1 dev ppp0
ip r a 128.0.0.0/1 dev ppp0

ip r


you shouldn't see a default route but your internet should still be
working.

> 
> 
> > 
> > you also have wireless on ath0
> 
> Yes, forgot to specify that.
> 
> Thanks.
> 

-- 
It is up to us to produce better-quality movies.
		-- Lloyd Kaufman, producer of "Stuff Stephanie in the Incinerator"

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