Domain name not working

[hostingsolution]

Dear friend
i m in a problem i have a vps and till today my all domain working from there and now the the domain name not working but when i open my site by ip it working by but by domain name it not working so please help me on this

 

[SeLLeRoNe]

without domain name there is no way to investigate. the most probably error should be with dns server

Give us the real domain name for more investigations.

Regards