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                                                                 EXHIBIT 10.5(b)

                   AMENDMENT TO REGISTRATION RIGHTS AGREEMENT

         THIS AMENDMENT TO REGISTRATION RIGHTS AGREEMENT (this "Amendment") is
made and entered into as of the 24th day of December, 1999, by and among
INTERLAND, INC., a Georgia corporation (the "Company"), CREST COMMUNICATIONS
PARTNERS, L.P., a Delaware limited partnership, CREST ENTREPRENEURS FUND, L.P.,
a Delaware limited partnership (collectively "Crest"), BOULDER VENTURES III,
L.P., a Delaware limited partnership ("Boulder"), MICROSOFT CORPORATION
("Microsoft") and the other investors set forth on the signature page hereto
(the "Other Investors"), to amend the terms of that certain Registration Rights
Agreement by and among the Company, Crest, Boulder and the Other Investors
dated as of December 2, 1999 (the "Agreement").

         WHEREAS, the Agreement was entered into in connection with Crest's and
Boulder's acquisition of an aggregate of 9,174,313 shares of the Company's
Series A Convertible Participating Preferred Stock, no par value per share (the
"Series A Stock");

         WHEREAS, in connection with Microsoft's acquisition of 2,300,000
shares of the Series A Stock, it desires to be entitled and subject to all of
the rights and obligations of the Agreement pari passu with each of Boulder and
Crest;

         WHEREAS, the Company, Crest and Boulder have determined and agreed
that it would be in the strategic best interest of the Company to amend the
Agreement to include Microsoft as a party to the Agreement.

         NOW, THEREFORE, the parties hereto, in consideration of the foregoing
and other good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, agree as follows:

         1.       The Agreement is hereby amended to include Microsoft as a
party thereto as one of the Holders (as defined therein) for all purposes
thereunder. As such, Microsoft shall have all of the rights and obligations
under and pursuant to the Agreement in exactly the same manner and to the same
extent as such rights and obligations are granted to each of Holders.

         2.       The definition of Holders contained in Section 2 of the
Agreement shall be deleted and restated in its entirety as follows:

                  ""Holders" shall mean Crest, Boulder, Microsoft, the Other
Investors and any other person or entity that is a valid transferee of the
rights granted hereunder pursuant to SECTION 1.7 hereof."

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                  IN WITNESS WHEREOF, the undersigned individuals and the
respective duly authorized officer or partner, as the case may be, of each of
the parties hereto have executed this Amendment as of the day and year first
hereinabove set forth.

                                  INTERLAND, INC.

                                  By:      /s/ Ken Gavranovic
                                     ----------------------------------------
                                  Name:      Ken Gavranovic
                                  Title:     President and Chief Executive
                                             Officer

                                  THE HOLDERS

                                  CREST COMMUNICATIONS
                                  PARTNERS L.P.

                                  By:      Crest Communications Holdings LLC
                                  Its:     Authorized Representative

                                  By:      /s/ Gregg A. Mockenhaupt
                                     ----------------------------------------
                                  Name:      Gregg A. Mockenhaupt
                                  Title:     Managing Director

                                  CREST ENTREPRENEURS FUND L.P.

                                  By:   Crest Communications Holdings LLC
                                  Its:  Authorized Representative

                                  By:      /s/ Gregg A. Mockenhaupt
                                     ----------------------------------------
                                  Name:      Gregg A. Mockenhaupt
                                  Title:     Managing Director

                                  BOULDER VENTURES III, L.P.

                                  By:      /s/ Andrew E. Jones
                                     ----------------------------------------
                                  Name:      Andrew E. Jones
                                  Title:     Partner

<PAGE>   3

                                  BANCBOSTON VENTURES INC.

                                  By:      /s/ M. Scott McCormack
                                     ----------------------------------------
                                  Name:      M. Scott McCormack
                                  Title:     Vice President

                                  PRIVATE EQUITY CO-INVEST LTD.

                                  By:      VBTC Management, Ltd.
                                  Its:     Sole Director

                                  By:      /s/ John Arnold
                                     ----------------------------------------
                                  Name:      John Arnold
                                  Title:     Chairman

                                  BOULDER VENTURES III (ANNEX),
                                  L.P.

                                  By:      /s/ Andrew E. Jones
                                     ----------------------------------------
                                  Name:      Andrew E. Jones
                                  Title:     Partner

                                  MICROSOFT CORPORATION

                                  By:        /s/ Bruce Jaffe
                                     ----------------------------------------
                                  Name:      Bruce Jaffe
                                  Its:       Director - Corporate Development<PAGE>   1

                                                                EXHIBIT 10.5(c)

                   AMENDMENT TO REGISTRATION RIGHTS AGREEMENT

         THIS AMENDMENT TO REGISTRATION RIGHTS AGREEMENT (this "Amendment") is
made and entered into as of the 15th day of March, 2000, by and among
INTERLAND, INC., a Georgia corporation (the "Company"), CREST COMMUNICATIONS
PARTNERS, L.P., a Delaware limited partnership, CREST ENTREPRENEURS FUND, L.P.,
a Delaware limited partnership (collectively "Crest"), BOULDER VENTURES III,
L.P., a Delaware limited partnership ("Boulder"), MICROSOFT CORPORATION, a
Washington corporation ("Microsoft"), NETWORK SOLUTIONS, INC., a Delaware
corporation ("NetSol") and the other investors set forth on the signature page
hereto (the "Other Investors"), to amend the terms of that certain Registration
Rights Agreement by and among the Company, Crest, Boulder and the Other
Investors dated as of December 2, 1999 as amended on December 23, 1999 (the
"Agreement").

         WHEREAS, the Agreement was entered into in connection with Crest's and
Boulder's acquisition of an aggregate of 9,174,313 shares of the Company's
Series A Convertible Participating Preferred Stock, no par value per share (the
"Series A Stock") and amended on December 23, 1999 to include Microsoft as a
party to the Agreement;

         WHEREAS, in connection with NetSol's acquisition of 689,655 shares of
the Series A Stock, it desires to be entitled and subject to all of the rights
and obligations of the Agreement pari passu with each of Boulder, Crest and
Microsoft;

         WHEREAS, the Company, Crest and Boulder have determined and agreed
that it would be in the strategic best interest of the Company to amend the
Agreement to include NetSol as a party to the Agreement.

         NOW, THEREFORE, the parties hereto, in consideration of the foregoing
and other good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, agree as follows:

         1.       The Agreement is hereby amended to include NetSol as a party
thereto as one of the Holders (as defined therein) for all purposes thereunder.
As such, NetSol shall have all of the rights and obligations under and pursuant
to the Agreement in exactly the same manner and to the same extent as such
rights and obligations are granted to each of Holders.

         2.       The definition of Holders contained in Section 2 of the
Agreement shall be deleted and restated in its entirety as follows:

                  ""Holders" shall mean Crest, Boulder, Microsoft Corporation,
Network Solutions, Inc., the Other Investors and any other person or entity
that is a valid transferee of the rights granted hereunder pursuant to SECTION
1.7 hereof."

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                  IN WITNESS WHEREOF, the undersigned individuals and the
respective duly authorized officer or partner, as the case may be, of each of
the parties hereto have executed this Amendment as of the day and year first
hereinabove set forth.

                                  INTERLAND, INC.

                                  By:      /s/ Ken Gavranovic
                                     ----------------------------------------
                                  Name:      Ken Gavranovic
                                  Title:     President and Chief Executive
                                             Officer

                                  THE HOLDERS

                                  CREST COMMUNICATIONS PARTNERS
                                  L.P.

                                  By:      Crest Communications Holdings LLC
                                  Its:     Authorized Representative

                                  By:      /s/ Gregg A. Mockenhaupt
                                     ----------------------------------------
                                  Name:      Gregg A. Mockenhaupt
                                  Title:     Managing Director

                                  CREST ENTREPRENEURS FUND L.P.

                                  By:   Crest Communications Holdings LLC
                                  Its:  Authorized Representative

                                  By:      /s/ Gregg A. Mockenhaupt
                                     ----------------------------------------
                                  Name:      Gregg A. Mockenhaupt
                                  Title:     Managing Director

                                  BOULDER VENTURES III, L.P.

                                  By:      /s/ Andrew E. Jones
                                     ----------------------------------------
                                  Name:      Andrew E. Jones
                                  Title:     Partner

                                  BANCBOSTON VENTURES INC.

<PAGE>   3

                                  By:      /s/ M. Scott McCormack
                                     ----------------------------------------
                                  Name:      M. Scott McCormack
                                  Title:     Vice President

                                  PRIVATE EQUITY CO-INVEST LTD.

                                  By:      VBTC Management, Ltd.
                                  Its:     Sole Director

                                  By:      /s/ Clive Munyard
                                     ----------------------------------------
                                  Name:      Clive Munyard
                                  Title:     Executive Director

                                  BOULDER VENTURES III (ANNEX), L.P.

                                  By:      /s/ Andrew E. Jones
                                     ----------------------------------------
                                  Name:      Andrew E. Jones
                                  Title:     Partner

                                  MICROSOFT CORPORATION

                                  By:        /s/ Amar Nehru
                                     ----------------------------------------
                                  Name:      Amar Nehru
                                  Its:       GM - Corporate Development

                                  NETWORK SOLUTIONS, INC.

                                  By:        /s/ James P. Rutt
                                     ----------------------------------------
                                  Name:      James P. Rutt
                                  Its:       Chief Executive Officer

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