Forde, a 35-year-old goalkeeper, has played for Millwall since 2008. He played 50 games this season, and has represented the club 328 times in his career.
Despite being relegated with the London club, Forde has long been considered one of the best goalkeepers in the Championship, and he has earned international praise for his impressive displays.
Despite his age, he managed to only make his first appearance for Ireland in 2011, but has since gone on to win 11 caps for his country.
The report states that Forde is expected to leave Millwall following their drop down a division, and Derby are the main club said to be tracking his services.
Lee Grant is current first choice stopper at the iPro Stadium, whilst Kelle Roos is his understudy, but Steve McClaren is on the look out for an experienced Championship ‘keeper to provide competition for Grant.
Grant had performed admirably up until the late stage of the season, before he collapsed and suffered a massive loss of form. McClaren had no reliable back-up to call upon, and it is clear that Roos is not in his favour as a Championship level goalkeeper.
With Forde expected to leave the Den, Derby should be able to complete a deal for him at a cut-price fee.