DUBAI - Pan-Arab satellite network Al Jazeera is combating a large-scale cyber attack but all its entities remained operational, a company source said on Thursday. 'There were attempts made on the cyber security of Al Jazeera but we are combating them and currently all our entities are operational,' said a senior employee who declined to be named because of the sensitivity of the matter. Al Jazeera is the flagship broadcaster for Qatar, which is in a stand-off with fellow Arab states over alleged ties to terrorism, a row which is endangering stability in the region.