Re: dhcp over ipsec with linux 2.6

2006-01-26 Thread Patrick McHardy
Marco Berizzi wrote:
 I would like to deploy dhcp over ipsec with openswan
 2.4.x running on linux 2.6.15.1. To achieve this
 solution I need dhcp relay agent running on the ipsec
 gateway box (there will be also the dhcp server on the
 same box). I'm using the native linux 2.6 ipsec (no
 KLIPS) so there is no virtual devices. ISC dhcp relay
 agent need to know which interface should listen (-i
 flag). With KLIPS I set '-i ipsecX' interface. What
 should I specify when I'm using the native 2.6 stack?

You can use ipip or gre tunnels over IPsec and use these
devices. If you're using ISC dhcrelay you'll need to patch
the BPF expressions to handle the link type correctly.
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Re: dhcp over ipsec with linux 2.6

2006-01-26 Thread Marco Berizzi


Patrick McHardy wrote:


Marco Berizzi wrote:
 I would like to deploy dhcp over ipsec with openswan
 2.4.x running on linux 2.6.15.1. To achieve this
 solution I need dhcp relay agent running on the ipsec
 gateway box (there will be also the dhcp server on the
 same box). I'm using the native linux 2.6 ipsec (no
 KLIPS) so there is no virtual devices. ISC dhcp relay
 agent need to know which interface should listen (-i
 flag). With KLIPS I set '-i ipsecX' interface. What
 should I specify when I'm using the native 2.6 stack?

You can use ipip or gre tunnels over IPsec and use these
devices.


I can't use ipip or gre tunnels over IPsec because the
other peer doesn't support them :-((


If you're using ISC dhcrelay you'll need to patch
the BPF expressions to handle the link type correctly.


Thanks for the response.


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Re: dhcp over ipsec with linux 2.6

2006-01-26 Thread Patrick McHardy
Marco Berizzi wrote:
 
 Patrick McHardy wrote:
 
 Marco Berizzi wrote:
  I would like to deploy dhcp over ipsec with openswan
  2.4.x running on linux 2.6.15.1. To achieve this
  solution I need dhcp relay agent running on the ipsec
  gateway box (there will be also the dhcp server on the
  same box). I'm using the native linux 2.6 ipsec (no
  KLIPS) so there is no virtual devices. ISC dhcp relay
  agent need to know which interface should listen (-i
  flag). With KLIPS I set '-i ipsecX' interface. What
  should I specify when I'm using the native 2.6 stack?

 You can use ipip or gre tunnels over IPsec and use these
 devices.
 
 
 I can't use ipip or gre tunnels over IPsec because the
 other peer doesn't support them :-((

I think its also possible to change dhcrelay to use regular
UDP sockets instead of AF_PACKET sockets, which should work
fine on the real device.
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