Hello,<br><br>Are your netmask config Ok? Can you use wireshark to sniff traffic in the middle LANCOM <->Wireshark/tcpdump<->Xenserver and send me a trace? <br><br>Best Regards,<br><br clear="all">Juan Carlos Díaz Fernández<br>
IGN Solutions™<br>Director Técnico<br>mailto: <a href="mailto:juan.carlos.diaz@ign-solutions.com">juan.carlos.diaz@ign-solutions.com</a><br>callto: +34638295207/+34617413903<br><br>Innova Galicia Networks Solutions SL<br>
<a href="http://www.ign-solutions.com">http://www.ign-solutions.com</a><br>Pazo de Feiras e Congresos de Lugo - Palomar s/n<br>27004 LUGO - Spain<br>callto: +34982284150 faxto: +34982284922<br>
<br><br><div class="gmail_quote">2010/3/5 Michael Schumacher <span dir="ltr"><<a href="mailto:michael.schumacher@pamas.de">michael.schumacher@pamas.de</a>></span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<br>
Nobody having an idea?<br>
<div><div></div><div class="h5"><br>
> Hi,<br>
> I am trying to fix a problem I have for about a week now.<br>
> The environment is:<br>
> --several independent servers with Centos5.4 on the latest patchlevel<br>
> (example will be server2) All of them are working properly.<br>
> --a machine with Xen installed to host some virtual machines<br>
> (xenserver1)<br>
> --domu servers on xenserver1 (crmserver1, winserver1)<br>
<br>
> The whole network is connected with a Lancom router to a DSL line.<br>
<br>
> Some days ago I noticed that server2 was updated properly, but<br>
> xenserver1, crmserver1 and winserver were not updating the OS<br>
> properly. They seemed to be cut off the internet. I can ping from all<br>
> to all servers internally, I can ssh from all to all servers<br>
> internally and I can browse the Internet from server2 successfully<br>
> (using IP-numbers and hostnames), but xenserver1 and its domu clients<br>
> could not connect to the internet. I checked the firewalls on<br>
> xenserver, and crmserver1. They seemed to be OK and stopping them with<br>
> "etc/init.d/iptables stop" didn't solve the problem.<br>
<br>
> I can resolve hostnames:<br>
<br>
>>[root@xenserver1 ~]# nslookup <a href="http://www.centos.org" target="_blank">www.centos.org</a><br>
>>Server: 192.168.1.1<br>
>>Address: 192.168.1.1#53<br>
>><br>
>>Non-authoritative answer:<br>
>>Name: <a href="http://www.centos.org" target="_blank">www.centos.org</a><br>
>>Address: 72.232.194.162<br>
<br>
> but I cannot browse neither to "elinks <a href="http://www.centos.org" target="_blank">http://www.centos.org</a>" nor to<br>
> 72.232.194.162, however, I can ping <a href="http://www.centos.org" target="_blank">www.centos.org</a> successfully.<br>
<br>
<br>
> the network routes seem to be OK :<br>
<br>
>>[root@xenserver1 ~]# route<br>
>>Kernel IP routing table<br>
>>Destination Gateway Genmask Flags Metric Ref Use Iface<br>
>>10.1.1.0 * 255.255.255.0 U 0 0 0 eth1<br>
>>192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0<br>
>>169.254.0.0 * 255.255.0.0 U 0 0 0 eth0<br>
>>192.168.0.0 * 255.255.0.0 U 0 0 0 eth0<br>
>>default LANCOM_1751_1.p 0.0.0.0 UG 0 0 0 eth0<br>
<br>
> (eth1 is a drbd interface)<br>
<br>
>> [root@crmserver1 ~]# route<br>
>> Kernel IP routing table<br>
>> Destination Gateway Genmask Flags Metric Ref Use Iface<br>
>> 169.254.0.0 * 255.255.0.0 U 0 0 0 eth0<br>
>> 192.168.0.0 * 255.255.0.0 U 0 0 0 eth0<br>
>> default LANCOM_1751_1.p 0.0.0.0 UG 0 0 0 eth0<br>
<br>
<br>
<br>
> Has anybody any clue where to look?<br>
<br>
best regards<br>
---<br>
Michael Schumacher<br>
<br>
<br>
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