[LARTC] aes unsupported algorithm for ipsec?

[Tim Stoop]

Hi all,

I'm trying to create a IPsec tunnel from a Debian Etch machine to a
Cisco PIX. Part of my config is the following:

add x.x.x.x x.x.x.x esp 34501 -m tunnel -E aes-ctr "abcdefghijklmnop";

When I try to set this using setkey, it fails with the following message:

line 9: unsupported algorithm at [abcdefghijklmnop]
parse failed, line 9.

Can anyone tell me what I'm doing wrong?

-- 
Gegroet,
Tim