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VPN over IPVS with direct routing method

To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: VPN over IPVS with direct routing method
From: "Valeriy V. Peshkoff" <peshkoff@xxxxxxxxx>
Date: Tue, 28 Mar 2006 12:45:47 +0400
Hello!

I try to use IPVS under Debian to balance VPN connections (PPTPD) with
direct routing method:

IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.18.247:1723 rr
  -> lnrealserver3:1723           Route    1      0          0
  -> lnrealserver2:1723           Route       1      0          0

TCP 1723 works well, but I've got problems with GRE (proto 47) - Director
generate ICMP error:

icmp 65: 192.168.18.247 protocol 47 unreachable

After that I use NAT method:

lndirector:~# ipvsadm -l
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.18.247:1723 rr
  -> lnrealserver3:1723           Masq    1      0          0
  -> lnrealserver2:1723           Masq    1      0          0

...  and all works fine


Do you have any ideas for non TCP/UPD protocols with TCP in the same TCP
session?

>From MAN 8 ipvsadm:

Supported features include two protocols (TCP and UDP) ...

--
Russia,  St. Petersburg
Valeriy V. Peshkov | peshkoff@xxxxxxxxx

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