[Openswan Users] l2tpd gives "Resource temporarily unavailable" with nat-t (was:Debian openswan Nat-t problem (ESP packets))

Paul Wouters paul at xelerance.com
Sat Sep 4 14:43:04 CEST 2004

On Sat, 4 Sep 2004, Marco Perrando wrote:

> - it returns with -1 and with errno = "Resource temporarily unavailable"

This is a problem of the 2.6 native ipsec stack. KLIPS does not have this

I believe it is due to packets that should trigger a tunnel. While the
tunnel is being setup this error happens, instead of the packet being
cached and send on after the tunnel established, this error is returned.
Though you might triggering thing slightly different.

That is also why Opportunistic Encryption currently does not work well
with the 2.6 stack.


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