A former Abbott government frontbencher has criticised male asylum seekers who seek refuge overseas instead of fighting for their homeland.

Liberal backbencher Bob Baldwin told Parliament last night that it was "a bit rich" to expect coalition soldiers to fight in countries such as Syria and Iraq when appropriately aged citizens were fleeing the violence.

He said he would fight, and expect his sons to take up arms, if Australia came under attack.

"What I have noticed, as have many of my constituents, is that a large number of the refugees fleeing Syria, Iraq and other war-torn countries seem to be predominantly males between 18 and 45," he said.

"Why are they not staying and training to defend their land, their lifestyle and their rights?... It is a bit rich to expect others from foreign countries to lay down their lives for you if you are not prepared to stand and fight."

Mr Baldwin spoke in support of the Government's legislation to strip dual nationals of their Australian citizenship if convicted of a terror offence.

"If you do not like Australia and all it has to offer, then do not come, do not stay, go back to where you came from," he said.

Mr Baldwin said he was proud to speak on the bill, stating there was "no room in the world for Daesh [another name for Islamic State] death cults".

The bill passed the Lower House overnight and is scheduled for debate in the Senate this evening.

Mr Baldwin also expressed concerns over the vetting of refugees, which Immigration Minister Peter Dutton addressed in Parliament yesterday.

Mr Dutton said that the 12,000 Syrian and Iraqi refugees to be resettled in Australia would be subject to "the most rigorous criteria".

"We are applying biometric and fingerprint testing," he said.

"We can be assured that people who are applying under that program are indeed those who are most in need.

"If we find an applicant where we have a suspicion about the person's motivation or background or affiliations, that person will not proceed into this program, they will not be coming to this country."