[pptp-server] GRE: read error: Protocol not available

[George Vieira]

I don't see any mention of the error messages below except for proxy arp.
 
Proxyarp only works if your internal LAN address is in the same network as
your VPN addresses.... IE..
 
LAN Clients             VPN Server LAN IP                    VPN Client
192.168.0.1-200  <----> 192.168.0.254 <-----// Internet//------->
192.168.0.201
 
Because the VPN client has an IP which is the same as the local LAN,
proxyarp will respond to network packets destined to 192.168.0.201 and
forward them on to the VPN client if ip_forward is enabled...
 
Everybody makes this mistake/misunderstanding.


thanks, 
George Vieira 
Systems Manager 
Citadel Computer Systems P/L 

-----Original Message-----
From: Murali K. Vemuri [mailto:muralivemuri at multitech.co.in]
Sent: Monday, 10 December 2001 2:52 PM
To: George Vieira
Cc: PPTP List (E-mail)
Subject: Re: [pptp-server] GRE: read error: Protocol not available


hi, 

attached file is the message posted when the connection fails due to
mppe-128. 
it has another curious message as well: " cannot find eth0 for proxy arp". 
also, i was digging a bit more into the PPTP error. when i use 1.1.2, i get
the error 
" PTY read or GRE write failed" 
if i use 1.0.1 i get " error with select ()". 
any ideas? 
regds 
murali krishna vemuri 
  


George Vieira wrote: 


He most likely only supports 40bit encryption.. he might have to download
DUN1.4 from microsoft and update it.Did you compile your PPPD driver as a
module or built into the kernel?Can you paste a small section of a complete
pppd connection which fails..? 

thanks, 
George Vieira 
Systems Manager 
Citadel Computer Systems P/L 

-----Original Message----- 
From: Murali K. Vemuri [ mailto:muralivemuri at multitech.co.in
<mailto:muralivemuri at multitech.co.in> ] 
Sent: Monday, 10 December 2001 2:14 PM 
To: George Vieira 
Cc: PPTP List (E-mail) 
Subject: Re: [pptp-server] GRE: read error: Protocol not available
hey, 

i am getting inconsistent errors. some times i get the error " Error with
select (), quitting" 
and some other times, i get the error " PTY read or GRE write failed" 
i am using kernel 2.4.6, ppp 2.4.1 and pptp 1.0.1 , 1.1.2 ( i had been
getting the same problem with both). 
client is win 98 machine ppp link is fine with mppe -40 encryption. 
also, if i enable only "mppe-128" on the server, he fails to connect. 
any ideas? 
regds 
murali krishna vemuri 
George Vieira wrote:

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