I've found a solution.
For Talend Studio, go to Window -> Preferences -> Talend -> Run/Debug and there you can change the stats port range.
But this configuration doesn't propagate for TAC.
For Talend Administration Center, edit the following file:
TOMCAT_FOLDER/webapps/org.talend.administrator/WEB-INF/classes/configuration.properties
Look for these lines:
# The range where find a free port on the Administrator machine, where the job will send the statistics informations during its execution
scheduler.conf.statisticsRangePorts=10000-11000
And then change the scheduler.conf.statisticsRangePorts parameter for the desired range, like this:
scheduler.conf.statisticsRangePorts=10000-10001
Regards