Hello,
When changing anything network-related, please make sure to restart (reload) the network service itself along with any other service which may be impacted. In your case, I'd recommend restarting the dnsmasq and network services by issuing the following commands:
/etc/init.d/dnsmasq reload
/etc/init.d/network reload
You may issue these commands in a single line by using '&&' in between the commands. This will make sure that each service reloads one after another and if any of these commands fail, the others won't be executed. For example:
/etc/init.d/dnsmasq reload && /etc/init.d/network reload
Full list of services can be retrieved by issuing the following command via CLI (SSH/Telnet):
ls /etc/init.d/
Best regards,
Tomas.