Included PDF pages mess up page numbering in PDF-reader

Question

I have a report with a frontpage, abstract, preface and acknowledgement. These pages are not numbered. Then the remaining pages contain several chapters and all these pages are numbered. Today I added however two PDF information pages between the frontpage and the abstract. That messed up the page numbering! On paper everything is still okay, because the numbers are not printed on these pages, but when I view the document digitally with a PDF-reader then the page numbering starts on 1 with the first included PDF-page, the next included PDF page is page 2. The abstract, preface and acknowledgement pages from the original document have all become page 1.

Like this:

[code]
Frontpage = {page 1}
[Included PDF1] = Page 2
[Included PDF2] = Page 3
Abstract = Page 1
Preface = Page 1
Acknowledgement = Page 2
TOC = Page 3
[/code]

All pages up to the TOC used to be unnumbered, but now they have a page number with a value that is obviously wrong. I am pretty sure the \pdfinclude command is responsible. I would like the numbering to start on the Acknowledgement or TOC page and continue without resetting the counter. That is how it used to be, but the included PDF-pages mess up the numbering somehow and force the unnumbered pages to have page number 1.

How can I restore this to a normal page numbering like:

[code]
Frontpage = {no page number}
[Included PDF1] = {no page number}
[Included PDF2] = {no page number}
Abstract = Page {no page number}
Preface = Page 1
Acknowledgement = Page 2
TOC = Page 3
[/code]

A minimalistic code example:

[code]
\documentclass[12pt]{report}

\usepackage{hyperref}
\usepackage{pdfpages}

\begin{document}

\input{./texfrontpage.tex}

\includepdf[pages={1,2}]{./pdf/information-page-one.pdf, ./pdf/information-page-two.pdf}

\begin{abstract}
  Interesting stuff.
\end{abstract}

\chapter*{Preface}
\addcontentsline{toc}{section}{Preface}

\chapter*{Acknowledgement}
\addcontentsline{toc}{section}{Acknowledgement}

\tableofcontents

\chapter{Introduction}

\chapter{Background}

\chapter{Results}

\chapter{Conclusion}

\end{document}
[/code]

To clarify: I do not want to include the page numbers of the two included PDF files nor do I want the page numbering to reset. I want the page numbers to start counting from the Preface of Acknowledgement page. That should be the first true page with page number 1. Everything before that should have no page number.

Answer 1

Here is a solution. With \pagenumbering{gobble} and \pagenumbering{arabic}

\documentclass[12pt]{report}

\usepackage{hyperref}
\usepackage{pdfpages}

\begin{document}
\pagenumbering{gobble}

\input{./texfrontpage.tex}

\includepdf[pages={1,2}]{./pdf/information-page-one.pdf, ./pdf/information-page-two.pdf}

\begin{abstract}
  Interesting stuff.
\end{abstract}

\pagenumbering{arabic}
\chapter*{Preface}
\addcontentsline{toc}{section}{Preface}

\chapter*{Acknowledgement}
\addcontentsline{toc}{section}{Acknowledgement}

\tableofcontents

\chapter{Introduction}

\chapter{Background}

\chapter{Results}

\chapter{Conclusion}

\end{document}