National Rugby League boss David Gallop defended the league's punishment of its latest salary cap offenders in the face of heavy criticism from Bulldogs fans.

`Dogs supporters vented their frustrations on several websites, singling out the premiership-winning Sydney Roosters for special treatment.

The club's fans claimed the Roosters had been leniently dealt with after receiving a fine totalling $150,000 for breaching the cap over the past two years.

Bulldogs fans were encouraged to email Gallop with their protests, but the NRL boss was standing his ground on Thursday.

"I thought what we did was fair, not only with the big one last year but the situation in previous years," Gallop said.

"The fact is, by and large, these were about payments washing out of the system from arrangements put in place a few years ago.

"At the end of the day the Bulldogs thing was pretty unique in its widespread nature. I think this sort of thing will become less and less common.

"The clubs are now used to the rules and how they apply."

Bulldogs supporters are still stinging after the club was fined $500,000 and docked 37 points last season for breaching the league's cap over the past two seasons.

Supporters claimed, among other things, that the Roosters should be docked points this season, that their premiership was tarnished and that the league had gone soft on the club.

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