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> On Tue, 2010-05-04 at 20:30 +0200, mve@xxxxxxxxxxxxxxxxx wrote:
>> > Please post the bash script you're using to setup the loopback device
>> > etc. so i can take a look and maybe adjust it.
>>
>> echo "0" >/proc/sys/net/ipv4/ip_forward
>> cat /proc/sys/net/ipv4/ip_forward
>> echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_ignore
>> echo 2 > /proc/sys/net/ipv4/conf/eth0/arp_announce
>> echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
>> echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
>> /sbin/ifconfig lo:110 194.145.200.87 broadcast 194.145.200.87 netmask
>> 0xffffffff up
>> /sbin/ifconfig lo:110
>> /sbin/route add -host 194.145.200.87 dev lo:110
>>
>> I also run this script on server2 in exact the same way.
>
> Looks okay to me.
Ok..thanks for checking.
>
>> When I stop Iptables orflush them the reaction from the client is
>> different(as stated before).
>>
>> With iptables on:
>> [root@knox01 ~]# telnet 194.145.200.87 25
>> Trying 194.145.200.87...
>> telnet: connect to address 194.145.200.87: No route to host
>> telnet: Unable to connect to remote host: No route to host
>> [root@knox01 ~]# telnet 194.145.200.87 25
>>
>> With iptables off (service iptables stop) on server1:
>> (takes a long time)
>> Nothing happens:
>> root@knox01 ~]# telnet 194.145.200.87 25
>> Trying 194.145.200.87...
>
> Just realising something. Have you configured the mailserver service on
> the failing realserver to listen on _all_ interfaces? To be sure,
> compare the output of:
>
> $ netstat -tulpen | grep 25
Both servers are the same (0.0.0.0:25)
>
> on both realservers.
>
>
>> Could I run some tcpdumps on real servers and LVS dr to check what is
>> going wrong?
>
> Running tcpdump never hurt anyone :)
>
What kind of tcpdump should I do on the real servers and perhaps load
balancer?
(a tcpdump -n | grep *dest ip* | grep smtp gives too much output)
Here is where my expertise lacks.. :(
>
> Léon
>
Michiel
>
> _______________________________________________
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>
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