Crawling site with Host Header fails in search settings

RESOLUTION:
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On the Sharepoint server:
1. Click Start, click Run, type regedit, and then click OK
2. In Registry Editor, locate and then click the following registry key:
3. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
Right-click Lsa, point to New, and then click DWORD Value.
4. Type DisableLoopbackCheck, and then press ENTER.
5. Right-click DisableLoopbackCheck, and then click Modify.
6. In the Value data box, type 1, and then click OK
7. Quit Registry Editor, and then restart your computer.