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port unreachable

To: <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: port unreachable
From: "Dennis Kruyt" <d.kruyt@xxxxx>
Date: Mon, 1 Mar 2004 10:24:04 +0100
Hi,

I have the following problem, I have a loadbalancer to loadbalance
https/http, pop and smtp request. Al are working fine except for https.
I get some times a connection refused. 
If I look with tcpdump I get a "tcp port https unreachable". But the
real servers are ok, I test them also directly no problem with that. But
via the loadbalancer I get sometimes the port unreachable problem. At
that time both the realservers are in the loadbalancer.

IPVSADM:

TCP  webmail:https sh
  -> webmail2:https Route   1      0          6
  -> webmail1:https Route   1      0          0

TCPDUMP:

17:50:02.393586 webmail > bastion: icmp: webmail tcp port https
unreachable [tos 0xc0]
17:50:02.501516 webmail > bastion: icmp: webmail tcp port https
unreachable [tos 0xc0]
07:33:33.865130 webmail > bastion: icmp: webmail tcp port https
unreachable [tos 0xc0]
07:33:33.981106 webmail > bastion: icmp: webmail tcp port https
unreachable [tos 0xc0]
07:38:33.885537 webmail > bastion: icmp: webmail tcp port https
unreachable [tos 0xc0]
07:38:34.005550 webmail > bastion: icmp: webmail tcp port https
unreachable [tos 0xc0]
07:39:33.866876 webmail > bastion: icmp: webmail tcp port https
unreachable [tos 0xc0]
07:39:33.982925 webmail > bastion: icmp: webmail tcp port https
unreachable [tos 0xc0]

Bastion is the server I used for testing, so that server has noting to
do with the loadbalancing setup. The problem also happens with a other
hosts from the internet (ADSL users).

Has some one any idee to get the problem solved?

Met vriendelijke groet,
 
Dennis Kruyt,
Managed Services
 
ZXFactory BV
 
Telefoon: +31(0)318 67 22 93
Fax: +31 (0)318 693 042
E-mail: d.kruyt@xxxxx
Bezoek onze website: www.zx.nl

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