Any online port checker that can work on starhub maxonline?

[xorx]

I had been trying a few online port checkers and none of them are able to test if my ports are really open. I used the real ip address and it still can't work. Anyone one know of any online port checkers that can work?

[tidus792]

canyouseeme.org

[terry84]

youcantseeme.org

[xorx]

canyouseeme.org

It is not working for starhub maxonline

[edwin21]

seriously can't be that hard

http://lmgtfy.com/?q=grc+shield

[fullerms]

search the internet for shieldsup! Its a web based port scanner which you must initiate from the pc you want to check