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RE: [Openvpn-users] Strange Warning in log file


  • Subject: RE: [Openvpn-users] Strange Warning in log file
  • From: "Renato Salles" <rsalles@xxxxxxxxxxxxxxxxxxxx>
  • Date: Mon, 2 Feb 2004 02:24:31 -0200 (BRST)
  • Importance: Normal

For sure, i bypassed this parameter in my previuos mail to Anssi.


Sds,


RSalles

Anssi Kolehmainen disse:
>> I'm trieing to setup OpenVPN between my linux (server) and windows
>> box.
>> The tunnel uses tun on both sides and seperate subnets.
>> When i start the VPN on the windows box i get following entries in
>> /var/log/ messages and nothing works (no ping):
>>
>> openvpn[7056]: Peer Connection Initiated with 62.xxx.xxx.xxx:8000
>>
>> openvpn[7056]: WARNING: Actual Remote Options ('V3,dev-type
>> tun,link-mtu 1542,tun-mtu 1500,proto UDPv4,ifconfig 10.7.0.5
>> 10.7.0.6,comp-lzo,cipher BF-CBC,auth SHA1,keysize
>> 128,tls-client') are inconsistent with Expected Remote Options
>> ('V3,dev-type tun,link-mtu 1541,tun-mtu 1500,proto UDPv4,ifconfig
>> 10.7.0.5 10.7.0.6,cipher BF-CBC,auth SHA1,keysize
>> 128,tls-client')
>
> Read those actual and expected remote options carefully.
>
> Param       Actual     Expected
>             V3         V3
> dev-type    tun        tun
> link-mtu    1542       1541
> tun-mtu     1500       1500
> proto       UDPv4      UDPv4
> ifconfig    10.7.0.5   10.7.0.5
>             10.7.0.6   10.7.0.6
> (comp)      comp-lzo   (none)
> cipher      BF-CBC     BF-CBC
> auth        SHA1       SHA1
> keysize     128        128
> tls         tls-client tls-client
>
> [Maybe OpenVPN could print it out in this format... It would be definedly
> easier to spot differencies]
>
> Two differences: link-mtu and comp-lzo.
> Link-mtu probably won't cause anything bad, but if other end compresses
> data
> and other one doesn't then it won't work.
>
> Fix: add comp-lzo to windows box conf file
>
> Anssi Kolehmainen
>
>
>
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-- 
"A well-written program is its own heaven; a poorly-written program is its
own hell."
TAO of Programming - Book 4


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