I've download last ubuntu kernel 2.6.20-29, modify the config and add this modules: CONFIG_NETFILTER_XT_TARGET_CONNMARK=m CONFIG_NETFILTER_XT_MATCH_CONNMARK=m recompile the kernel and now is working.
Should be added in the next kernel release.
I've download last ubuntu kernel 2.6.20-29, modify the config and add this modules: NETFILTER_ XT_TARGET_ CONNMARK= m NETFILTER_ XT_MATCH_ CONNMARK= m
CONFIG_
CONFIG_
recompile the kernel and now is working.
Should be added in the next kernel release.