changed to port 80. it’s a vodafone sim that works perfectly with the samsung galaxy tab. no access, only via lan. network connection timeout.. i’ve also tried to change route priority to ppp0, no success.. as the no-ip client sends correctly the ip to their dns servers, the 3G internet connection works.. anyway i’ve tried to connect directly to the ip shown with ip addr (which is the same that appears after a while issueing a ping to the dns)
really strange….