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From: "Chris K Ellsworth" <cke@highlandshighspeed.net>
To: lartc@vger.kernel.org
Subject: [LARTC] Snat Mac address changing
Date: Sat, 05 Apr 2003 18:06:46 +0000	[thread overview]
Message-ID: <marc-lartc-104956606216698@msgid-missing> (raw)

ok i have a program called arpwatch on the network, monitors arp/ipmatching,
it sees that the public side of  the Snat box has its mac address switch
between the public and private interface.
here i tried to provide most the information that i can think of.

iptables v1.2.7a:
____________________
Linux ns.highlandshighspeed.net 2.4.19-gentoo-r10 #5 Sun Mar 9 16:53:57 PST
2003
 i686 Intel(R) Pentium(R) 4 CPU 1.60GHz GenuineIntel GNU/Linux
_____________________________
/bin/echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to-source 198.31.174.56
__________________________
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination
SNAT       all  --  anywhere             anywhere           to:198.31.174.56

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
__________________________
eth0      Link encap:Ethernet  HWaddr 00:04:75:A0:DE:59
          inet addr:a.b.c.d  Bcast:198.31.174.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:18320637 errors:0 dropped:0 overruns:1 frame:0
          TX packets:18395481 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:3151929956 (3005.9 Mb)  TX bytes:4285940372 (4087.3 Mb)
          Interrupt:11 Base address:0xe400

eth1      Link encap:Ethernet  HWaddr 00:04:75:A0:DD:F9
          inet addr:A.B.C.D  Bcast:192.168.33.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:20321245 errors:0 dropped:0 overruns:5 frame:0
          TX packets:18611116 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:768762048 (733.1 Mb)  TX bytes:3808977459 (3632.5 Mb)
          Interrupt:10 Base address:0xe800

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             reply	other threads:[~2003-04-05 18:06 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-04-05 18:06 Chris K Ellsworth [this message]
2003-04-05 18:36 ` [LARTC] Snat Mac address changing Martin A. Brown
2003-04-05 21:39 ` Chris K Ellsworth

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