Unable to retrive files stored on IPFS

I am unable to retrieve my files from IPFS. The files are stored in directory with following hash-
https://gateway.ipfs.io/ipfs/QmQsf14bwC49Qx4BkfVFe4DJuPb5hk61pGnbQnAE3nEv1S

The link was working fine before but as of now it is not working and after sometime it is showing Unable to reach error in Firefox.

do you have error message please ?

regards

The error is shown as follows after sometime-
504 Gateway Time-out
nginx/1.12.2

could you try with https://ipfs.io/ipfs/<your_hash> second question your daemon is up ?

Regards

I have tried it again with the link https://ipfs.io/ipfs/ and my ipfs daemon was running still getting following error-

504 Gateway Time-out
nginx/1.12.2

maybe you have proxy / firewall issue please try you can open 4001,4002/udp, 5001,8080,8081

maybe locally your ressource is enable but your daemon cannot discuss with external and so your ressource cannot display on gateway o ipfs.io.

regards