You should always check the rules set by the organizing committe of the conference to which you intend to submit your paper about what they require exactly.
The copy of your paper in conference proceedings will contain cumulative page numbering which will therefore be different than the local numbering for your paper. However, as a PostScript file is more useful if local page numbering is included, it is better to keep page numbering in the PostScript file for your paper. How to generate a second PostScript file without page numbering is explained next section.