Steve Cotterill will slap a £1,000-a-word fine on Pompey players leaking club information on Twitter or Facebook.
The Blues boss has decided to take action after a string of high-profile incidents involving footballers posting comments on the internet.
Greg Halford revealed on Twitter that Joel Ward would be playing at Watford on New Year's Day.
He also recently landed himself in hot water at Wolves when he let slip Steve Sidwell would be signing – with Fulham then stepping in to snap him up instead.
Cotterill himself was targeted by Rohan Ricketts on Twitter this week after refusing to give the former Spurs man a trial.
Now Pompey's boss is hitting his players hard in the pocket to put a stop to it all.
He said: 'I've told the lads here "don't be putting anything on there about you, training and Portsmouth Football Club".
'Otherwise, they will get fined 1,000 a word.
'It would be good if a few of them put a couple of sentences on – they will be skint next week.
'Greg (Halford) has done it before – he isn't the brightest.
'I just think if they spent less time on the computer and spent more time out on the training pitch we would have a lot better players.
'It's a load of old rubbish. I can't believe it.'