Error Code

Error Message

400

Bad request

401.1

Logon failed

401.2

Logon failed due to server configuration

401.3

Unauthorized due to ACL on resource

401.4

Authorization failed by filter

401.5

Authorization failed by ISAPI/CGI application

403.1

Execute access forbidden

403.2

Read access forbidden

403.3

Write access forbidden

403.4

SSL required

403.5

SSL 128 required

403.6

IP address rejected

403.7

Client certificate required

403.8

Site access denied

403.9

Too many users

403.10

Invalid configuration

403.11

Password change

403.12

Mapper denied access

403.13

Client certificate revoked

403.14

Directory listing denied

403.15

Client Access Licenses exceeded

403.16

Client certificate untrusted or invalid

403.17

Client certificate has expired or is not yet valid

404

Not found

404.1

Site not found

405

Method not allowed

406

Not acceptable

407

Proxy authentication required

412

Precondition Failed

414

Request-URI too long

500

Internal server error

500.12

Application restarting

500.13

Server too busy

500.15

Requests for Global.asa not allowed

500-100.asp

ASP error

501

Not implemented

502

Bad gateway

Top