Re: Help w/iptables & masquerade, I looked everywhere
From: Grant \(remove spam.bad.\) (trueg_at_spam.bad.shaw.ca)
Date: 02/03/05
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Date: Thu, 03 Feb 2005 05:27:49 GMT
Never mind, it ended up begin the wireless bridge I was using. I
plugged in my laptop directly and it worked perfectly. Thank you for the
help.
"Grant (remove spam.bad.)" <trueg@spam.bad.shaw.ca> wrote in message
news:eZdMd.255023$6l.122551@pd7tw2no...
> Sorry, but I didn't quite catch all of that. I have connectivity as I can
> ping www.google.ca from eth0. If I ping from eth1 I get name resolution,
> but "Desination Host Unreachable". Here is my route table....
>
> 192.168.2.0 0.0.0.0 255.255.255.0 U eth0
> 192.168.1.0 0.0.0.0 255.255.255.0 U eth1
> 169.254.0.0 0.0.0.0 255.255.0.0 U eth1
> 127.0.0.0 0.0.0.0 255.0.0.0 U lo
> 0.0.0.0 192.168.2.1 0.0.0.0 UG eth0
>
> I'm not worried about the workstations yet as I can't even ping from eth1
> yet.
>
> "prg" <rdgentry1@cablelynx.com> wrote in message
> news:1107280653.761287.99330@c13g2000cwb.googlegroups.com...
> >
> > Grant (remove spam.bad.) wrote:
> > > I have looked at lots of how to's and I think I am very close to
> > getting my
> > > linux box to actually route traffic. This is what I have..
> > >
> > > Redhat 9
> > > I have DHCP working (can get an address on my WinXP laptop)
> > > I have dnsmasq for DNS server/caching and it seems to work
> > >
> > > I need to get NAT working, so I have tried the following w/iptables..
> > > iptables --flush
> > > iptables --table nat --flush
> > > iptables --delete-chain
> > > iptables --table nat --delete-chain
> > > iptables --table nat --append POSTROUTING --out-interface eth0 -j
> > MASQUERADE
> > > iptables --append FORWARD --in-interface eth1 -j ACCEPT
> > > echo 1 > /proc/sys/net/ipv4/ip_forward
> > >
> > > I have two eth cards and eth0 is connected to my router and I have
> > Internet
> > > access on the Linux box. Eth1 authmatically assigns IPs to my XP
> > laptop.
> > > DNS seems to work as when I try to connect to www.google.ca I can see
> > that
> > > it resolves the name. Problem is I can't actually access or ping the
> > > Internet from my laptop.
> > >
> > > Can anyone help? Do I need to do a route command?
> >
> > On Linux/RH9 command line/terminal:
> > $ route -n
> > $ ifconfig -a
> >
> > On XP command line run:
> > [prompt] ipconfig /all
> >
> > Linux needs static net/host route to XP interface/IP (eth1)
> > $ man route
> >
> > XP needs the Linux box interface IP as its default route/GW
> > [prompt] ??? can't remember just now which gui tool/dialog
> >
> > XP:
> > ping localhost
> > ping RH9 eth1 IP
> > ping RH9 by name
> > ping dns server IP (local?)
> > ping RH9's ISP gateway directly
> > ping ISP's dns server directly
> >
> > If all is OK, enjoy.
> >
> > If not, remove firewall on RH9 _and_ XP temporarily (and disconnect
> > from ISP till you're ready to ping that connection). You must confirm
> > IP connectivity before futzing with the RH9/XP firewalls.
> >
> > Once you establish connectivity, put XP's firewall in place -- note
> > that the SP2 update just out finally provides XP with an "acceptable"
> > host firewall. Use it! Or use ZoneAlarm.
> >
> > Haven't bothered to look at your iptables rules -- no use till you
> > confirm connectivity.
> >
> > All we need really is the output of:
> > [root]# iptables -L -v
> >
> > Offhand, the script above, if that's all there is to it, looks shakey.
> > hth,
> > prg
> > email above disabled
> >
>
>
- Next message: prg: "Re: IPv4 IPv6 And routers"
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- In reply to: Grant \(remove spam.bad.\): "Re: Help w/iptables & masquerade, I looked everywhere"
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