[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [K12OSN] ip forwarding



Julius,

I need more info.

Can you do the following and send me the results ?

1)  ifconfig -a

2)  netstat -rn


That should be enough information to see what's going on.

I suspect an incorrect netmask somewhere.

Jim.



On Fri, 19 Apr 2002, Julius Szelagiewicz wrote:

> Jim, Paul, Russ, Eric,
> 	good suggestions. painfull, but good. especially Jim's -
> traceroute gives me results i just don't undeerstand. traceroute to
> 192.168.0.254 returns successfull in1 step, to .253 (terminal) goes on
> interminably over the default route, despite the route add ....:
> i am writing this logged in on ws at .253. .252 doesn't exist.
> 
> turtle:/mnt/julius: traceroute 192.168.0.254
> traceroute to 192.168.0.254 (192.168.0.254), 30 hops max, 20 byte packets
>  1 192.168.0.254 (192.168.0.254)                   0 ms    0 ms    0 ms
> turtle:/mnt/julius: traceroute 192.168.0.253
> traceroute to 192.168.0.253 (192.168.0.253), 30 hops max, 20 byte packets
>  1 ltspl.turtle.com (216.216.171.210)              0 ms    0 ms    0 ms
>  2 * * *
> turtle:/mnt/julius: traceroute 192.168.0.252
> traceroute to 192.168.0.252 (192.168.0.252), 30 hops max, 20 byte packets
>  1 ltspl.turtle.com (216.216.171.210)              0 ms    0 ms    0 ms
>  2 ltspl.turtle.com (216.216.171.210)           2998 ms !H 2998 ms !H 3001
> ms !
> turtle:/mnt/julius: netstat -nr|grep 192\.168\.0
> 192.168.0.0           216.216.171.210    UG       0          0  lan0
> 1500
> 
> ping just hangs and looses all the packets
> 
> i was hoping for something simple, since i can accces eth0 on the server
> from the outside. julius
> 
> p.s. all my ltsp servers have eth1 interfaces accessible either directly
> or over vpn from the main business system and i can get to the eth0
> from it, but no further. the business system has multiple network
> connections and does internal ip forwarding, i turned on ip_forwarding on
> all my ltsp servers.
> part of the pain comes from the fact that iptables fail on my servers, but
> this will be a separate question ;-)
> 
> 
> On Fri, 19 Apr 2002 jam McQuil com wrote:
> 
> > Julius,
> >
> > What happens if you run:
> >
> >    traceroute -n 192.168.0.xxx
> >
> > on the server ?
> >
> > Do the packets go in the right direction ?
> >
> > Which machine are you turning on ip_forwarding ?
> >
> > Does the machine you are pinging know how to get
> > packets back to 216.n.m.xxx ?
> >
> > When you say 'no go' on the ping, what do you get ?  An error?
> > or does it just hang ?
> >
> > Jim McQuillan
> > jam Ltsp org
> >
> >
> >
> > On Fri, 19 Apr 2002, Julius Szelagiewicz wrote:
> >
> > > Paul,
> > > 	going in is precisely what i need to do. Say, i have a server with
> > > puplic address of 216.n.m.210 sitting on my internal (firewalled) network
> > > and it runs terminals on 192.168.0.0 network. I need to be able to access
> > > a device at 192.168.0.xxx from 216.n.m.xxx. this machine knows how to
> > > acess the 192.168.0 network: route add net 192.168.0 216.n.m.210 1 takes
> > > care of that. now i need the server to pass the packets in (and out). i
> > > need to be able to ping 192.168.0.xxx from 216.n.m.xxx. For the time
> > > being, no joy. the echo 1 > /proc/sys/net/ipv4/ip_forwarding changes
> > > value, but the ping still doesn't go through. thanks, julius
> > >
> > > On Thu, 18 Apr 2002, Paul Nelson wrote:
> > > > Wait a minute guys...
> > > >
> > > > He wants to go from the outside TO the inside. That's a different question.
> > > > IS that what you're trying to do Julius?
> > > >
> > > > If so then I'm not sure how to do that. Perhaps some special routing tables
> > > > in your firewall... Sounds like a good stumper for the list!
> > > >
> > > > If you just want to make sure that all private ip based machines on your
> > > > K12LTSP network are able to go OUT then make sure that /etc/rc.d/init.d/nat
> > > > is on:  "/etc/rc.d/init.d/nat start"
> > > >
> > > > ;-) Paul
> > > >
> > > > > Dear Listers,
> > > > > silly question: how do I enable ip forwarding in the k12os server?
> > > > > i need to be able to get to a device on private side from the public side.
> > > > > i didn't even think about it, since this is default on the unices i work
> > > > > with. julius
> > >
> > >
> > >
> > > _______________________________________________
> > > K12OSN mailing list
> > > K12OSN redhat com
> > > https://listman.redhat.com/mailman/listinfo/k12osn
> > > For more info see <http://www.k12os.org>
> > >
> >
> > --
> >
> >
> >
> > _______________________________________________
> > K12OSN mailing list
> > K12OSN redhat com
> > https://listman.redhat.com/mailman/listinfo/k12osn
> > For more info see <http://www.k12os.org>
> >
> 
> 
> 
> _______________________________________________
> K12OSN mailing list
> K12OSN redhat com
> https://listman.redhat.com/mailman/listinfo/k12osn
> For more info see <http://www.k12os.org>
> 

-- 





[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]