Fwd: source interface ping bug ?

["nano bug" <linnewbye@gmail.com>]

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---------- Forwarded message ----------
From: nano bug <linnewbye@gmail.com>
Date: Aug 2, 2007 10:58 PM
Subject: Re: source interface ping bug ?
To: Patrick McHardy <kaber@trash.net>


Hello,

Yes I'm running NAT, I have atached the output of the iptables -t nat
-vxnL command and the routing tables

On 7/30/07, Patrick McHardy <kaber@trash.net> wrote:
> nano bug wrote:
> > [...]
> > using source interface :
> >
> > root@darkstar:~/iputils# ./ping -I eth2 87.248.113.14
> > PING 87.248.113.14 (87.248.113.14) from 86.106.19.75 eth2: 56(84) bytes of data.
> >>From 86.106.19.75 icmp_seq=1 Destination Host Unreachable
>
> > root@darkstar:~# tcpdump -i eth2 -vvv -n host 87.248.113.14 and host
> > 86.106.19.75
> > tcpdump: listening on eth2, link-type EN10MB (Ethernet), capture size 96 bytes
> > 01:19:24.292911 arp who-has 87.248.113.14 tell 86.106.19.75
>
>
> Are you using (or running) NAT locally? What do your routing tables look
> like?
>

[-- Attachment #2: route_tables --]
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root@darkstar:~#
root@darkstar:~#
root@darkstar:~# ip route show
80.97.71.0/24 dev eth0  proto kernel  scope link  src 80.97.71.23
10.10.10.0/24 dev eth1  proto kernel  scope link  src 10.10.10.1
86.106.18.0/23 dev eth2  scope link
127.0.0.0/8 dev lo  scope link
root@darkstar:~# ip rule show
0:      from all lookup local
50:     from all lookup main
100:    from 80.97.71.0/24 lookup 201
101:    from 86.106.18.0/23 lookup 202
102:    from all lookup 222
32766:  from all lookup main
32767:  from all lookup default
root@darkstar:~# ip route show table 201
default via 80.97.71.1 dev eth0  proto static
prohibit default  proto static  metric 1
root@darkstar:~# ip route show table 202
default via 86.106.18.1 dev eth2  proto static
prohibit default  proto static  metric 1
root@darkstar:~# ip route show table 222
default  proto static
        nexthop via 80.97.71.1  dev eth0 weight 1
        nexthop via 86.106.18.1  dev eth2 weight 99
prohibit default  proto static  metric 1
root@darkstar:~# iptables -V
iptables v1.3.8
root@darkstar:~# iptables -t nat -xvnL
Chain PREROUTING (policy ACCEPT 2120 packets, 298134 bytes)
    pkts      bytes target     prot opt in     out     source               destination
       1       48 DNAT       tcp  --  eth2   *       0.0.0.0/0            0.0.0.0/0           tcp dpts:18856:18870 to:172.16.2.1
       0        0 DNAT       udp  --  eth2   *       0.0.0.0/0            0.0.0.0/0           udp dpts:18856:18870 to:172.16.2.1

Chain POSTROUTING (policy ACCEPT 56 packets, 4568 bytes)
    pkts      bytes target     prot opt in     out     source               destination
       2      138 MASQUERADE  all  --  *      *       10.10.10.0/24        0.0.0.0/0
       0        0 MASQUERADE  all  --  *      *       172.16.1.0/24        0.0.0.0/0
       0        0 MASQUERADE  all  --  *      *       172.16.2.0/24        0.0.0.0/0

Chain OUTPUT (policy ACCEPT 55 packets, 4520 bytes)
    pkts      bytes target     prot opt in     out     source               destination
root@darkstar:~#