Re: Routing problems

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> I think the problem is probably the routing tables in the other boxes
> in the same LAN (e.g. 10.255.250.38)

route in 10.255.250.38:
Destination  Gateway   Genmask    Flags Metric Ref    Use Iface
192.168.122.0   *      255.255.255.0   U     0      0        0 virbr0
10.255.250.0    *      255.255.255.0   U     0      0        0 eth0
link-local          *      255.255.0.0       U     0      0        0 eth0
default   10.255.250.37  0.0.0.0         UG    0      0        0 eth0

traceroute -n 172.17.1.50 (from 10.255.250.38):
traceroute to 172.17.1.50 (172.17.1.50), 30 hops max, 40 byte packets
 1  10.255.250.37  0.194 ms  0.124 ms  0.120 ms
 2  195.39.130.92  3000.438 ms !H  3000.449 ms !H  3000.427 ms !H

The request comes to the LAN default GW and fells through to
its default GW eth0 leading to Internet, instead of going to eth3

:((
Thank you...
jh




> ------------ Původní zpráva ------------
> Od: Andrew Haley <aph@xxxxxxxxxx>
> Předmět: Re: Routing problems
> Datum: 18.2.2010 13:08:00
> ----------------------------------------
> On 02/18/2010 11:56 AM, j.halifax . wrote:
> >> Please post 
> >> * Full details of your network
> >> * The routing table, uncensored :)
> 
> Hmm, this is a remarkable plate of spaghetti.
> 
> I think the problem is probably the routing tables in the other boxes
> in the same LAN (e.g. 10.255.250.38)
> 
> Andrew.
> 
> 
> > route
> > Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> > 192.168.180.0 *                       255.255.255.0   U     0      0        0
> eth3
> > 10.200.1.0      10.255.250.250  255.255.255.0   UG    0      0        0 eth2
> > 195.39.130.0    *                      255.255.255.0   U     0      0        0
> eth0
> > 10.1.1.0        10.255.250.250   255.255.255.0   UG    0      0        0 eth2
> > 10.201.1.0      10.255.250.250  255.255.255.0   UG    0      0        0 eth2
> > 10.255.250.0    *                     255.255.255.0   U     0      0        0
> eth2
> > link-local      *                        255.255.0.0     U     1003   0       
> 0 eth0
> > link-local      *                        255.255.0.0     U     1004   0       
> 0 eth2
> > link-local      *                        255.255.0.0     U     1005   0       
> 0 eth3
> > 172.17.0.0   192.168.180.100 255.255.0.0     UG    0      0        0 eth3
> > 192.168.0.0  192.168.180.100 255.255.0.0     UG    0      0        0 eth3
> > default         pc89.n                0.0.0.0           UG    0      0       
> 0 eth0
> > 
> > ifconfig 
> > eth0      Link encap:Ethernet  HWaddr 00:1B:11:B1:5D:0D  
> >           inet addr:195.39.130.92  Bcast:195.39.130.255  Mask:255.255.255.0
> >           inet6 addr: fe80::21b:11ff:feb1:5d0d/64 Scope:Link
> >           UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
> >           RX packets:5174154 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:3474632 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:1000 
> >           RX bytes:2851269308 (2.6 GiB)  TX bytes:646868735 (616.9 MiB)
> >           Interrupt:21 Base address:0xca00 
> > 
> > eth2      Link encap:Ethernet  HWaddr 00:19:5B:38:B7:36  
> >           inet addr:10.255.250.37  Bcast:10.255.250.255  Mask:255.255.255.0
> >           inet6 addr: fe80::219:5bff:fe38:b736/64 Scope:Link
> >           UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
> >           RX packets:18187178 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:2506338 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:1000 
> >           RX bytes:1585335954 (1.4 GiB)  TX bytes:1901082841 (1.7 GiB)
> >           Interrupt:22 Base address:0xa900 
> > 
> > eth3      Link encap:Ethernet  HWaddr 00:1B:11:B1:1C:D4  
> >           inet addr:192.168.180.100  Bcast:192.168.180.255 
> Mask:255.255.255.0
> >           inet6 addr: fe80::21b:11ff:feb1:1cd4/64 Scope:Link
> >           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >           RX packets:2048995 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:4746 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:1000 
> >           RX bytes:201714109 (192.3 MiB)  TX bytes:364982 (356.4 KiB)
> >           Interrupt:18 Base address:0x6800 
> > 
> > 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:255570 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:255570 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:0 
> >           RX bytes:25105805 (23.9 MiB)  TX bytes:25105805 (23.9 MiB)
> > 
> > Thanx. :)
> > 
> > 
> >> ------------ Povodní zpráva ------------
> >> Od: Andrew Haley <aph@xxxxxxxxxx>
> >> PYedmt: Re: Routing problems
> >> Datum: 18.2.2010 12:31:34
> >> ----------------------------------------
> >> On 02/18/2010 11:19 AM, j.halifax . wrote:
> >>>> What is the address of the subnet "other LAN" ?
> >>>> There seem to be two more subnets, 192.168.180.0 and 172.17.0.0.
> >>> You are right, both of them are accessible through eth3 and the same 
> >>> box of 192.168.180.100 (I didn't include the whole routing table) like:
> >>> 172.17.0.0    192.168.180.100  255.255.0.0    UG   0    0    0  eth3
> >>> 192.168.0.0  192.168.180.100  255.255.0.0    UG   0    0    0  eth3.
> >>
> >> Please post
> >>
> >> * Full details of your network
> >> * The routing table, uncensored
> >>
> >>>> ------------ Povodní zpráva ------------
> >>>> Od: Andrew Haley <aph@xxxxxxxxxx>
> >>>> PYedmt: Re: Routing problems
> >>>> Datum: 18.2.2010 11:51:17
> >>>> ----------------------------------------
> >>>> On 02/18/2010 10:01 AM, Rick Sewill wrote:
> >>>>> On Thu, 2010-02-18 at 07:31 +0100, j.halifax . wrote: 
> >>>>>> Hi All,
> >>>>>>
> >>>>>> Could you please help me with routing in the LAN default GW box?
> >>>>>>
> >>>>>> I have 
> >>>>>> eth0 connected to Internet 
> >>>>>> eth2 to internal LAN 10.255.250.0 
> >>>>>> LAN default GW is 10.255.250.37
> >>>>>> eth3 connected to other LAN
> >>>>
> >>>> What is the address of the subnet "other LAN" ?
> >>>>
> >>>> There seem to be two more subnets, 192.168.180.0 and 172.17.0.0.
> >>>>
> >>>> Andrew.
> >>>>
> >>>>
> >>>>
> >>>>>> Route in the default GW (10.255.250.37):
> >>>>>>
> >>>>>> Destination       Gateway           Genmask         Flags Metric Ref 
> Use
> >>>> Iface
> >>>>>> 192.168.180.0   *                       255.255.255.0   U      0      0  
>  
> >>  
> >>>>  0  eth3
> >>>>>> 10.255.250.0     *                       255.255.255.0   U      0      0 
>  
> >>  
> >>>>   0  eth2
> >>>>>> link-local           *                       255.255.0.0      U     1003 
> 
> >> 0 
> >>>>       0  eth0
> >>>>>> link-local           *                       255.255.0.0      U     1004 
> 
> >> 0 
> >>>>       0  eth2
> >>>>>> link-local           *                       255.255.0.0      U     1005 
> 
> >> 0 
> >>>>       0  eth3
> >>>>>> 172.17.0.0       192.168.180.100  255.255.0.0      UG    0      0       
> 0
> >>
> >>>> eth3
> >>>>>> default             dsl-router            0.0.0.0             UG    0    
> 
> >> 0 
> >>>>       0  eth0
> >>>>>>
> >>>>>> >From the LAN default GW (10.255.250.37) 
> >>>>>> - I can ping 172.17.1.50:
> >>>>>> &nbsp;&nbsp;PING 172.17.1.50 (172.17.1.50) 56(84) bytes of data.
> >>>>>> &nbsp;&nbsp;64 bytes from 172.17.1.50: icmp_seq=1 ttl=253 time=5.62 ms
> >>>>>> &nbsp;&nbsp;64 bytes from 172.17.1.50: icmp_seq=2 ttl=253 time=3.29 ms
> >>>>>>
> >>>>>> >From other boxes in the same LAN (e.g. 10.255.250.38)
> >>>>>> - I cann't ping 172.17.1.50
> >>>>>> - I cann't traceroute 172.17.1.50: It goes to LAN default GW 
> >>>>>> &nbsp;&nbsp;10.255.250.37 and then to its default GW dsl-router on eth0
> >>>>>> &nbsp;&nbsp;instead of eth3 (so that the routing rule for 172.17.0.0
> >> doesn't
> >>>>
> >>>>>> &nbsp;&nbsp;match for 172.17.1.50)
> >>>>>>
> >>>>>> Can anybody help pleasee?
> >>>>>> Thank you so much!
> >>>>>> jh
> >>>>>>
> >>>>>
> >>>>> Your problem has me stumped.
> >>>>>
> >>>>> The only thing I can think of is to ask how iptables is set up.
> >>>>>
> >>>>> I think you have iptables doing masquerading to the eth0 interface.
> >>>>> The masquerading shouldn't be the problem.
> >>>>>
> >>>>> Are you doing anything special with packets coming in eth2 in iptables?
> >>>>>
> >>>>> I assume 10.255.250.38 can ping the Internet so you have routing set up.
> >>>>>
> >>>>> I can't think of anything else to check at this moment.
> >>>>>
> >>>>> Hopefully others will have better suggestions and ideas where to look.
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>> -- 
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> >>>>
> >>>>
> >>
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> >>
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