iDRAC9: Web Server no está disponible después de la actualización del firmware

Los servicios del servidor web de iDRAC son inaccesibles, pero se puede acceder a iDRAC a través de SSH.

A partir de iDRAC9 7.00.00.00, comprobamos el certificado del servidor web en busca de DHPARAM. En el caso de los certificados web personalizados y firmados por una CA, esto se realiza tras el reinicio de iDRAC y, si faltan parámetros DH, se agregan al archivo de certificado. Esta comprobación supone que el certificado cargado incluye un salto de línea final antes del final del archivo; De lo contrario, el formato se invalida cuando se agregan DHPARAM. 

Este es un ejemplo de archivo de certificado al que le falta el salto de línea (LF) antes del final del archivo (EOF). El resultado sería un servidor web inaccesible después de reiniciar iDRAC. 

$ hexdump -C idrac_cert.pem | tail -n 5
000008a0  5a 69 78 41 65 53 30 42  34 43 6c 50 52 6b 68 44  |ZixAeS0B4ClPRkhD|
000008b0  52 46 64 2b 77 3d 3d 0d  0a 2d 2d 2d 2d 2d 45 4e  |RFd+w==..-----EN|
000008c0  44 20 43 45 52 54 49 46  49 43 41 54 45 2d 2d 2d  |D CERTIFICATE---|
000008d0  2d 2d                                             |–               | // Missing LineFeed before EOF - (CRLF) in this case {0d} {0a}

Este problema se resolverá en la próxima versión 7.10.30.00. Si experimenta el problema después de la versión 7.00.00.00, pero antes de la versión 7.10.30.00, debe SSH en iDRAC y restablecer el certificado del servidor web para recuperarlo.

$ ssh root@idrac_ip
$ racadm sslresetcfg 

Posteriormente, el usuario puede volver a cargar un certificado personalizado o firmado por una CA tras asegurarse de que se haya finalizado correctamente con un LF antes de la EOF. 

En el siguiente ejemplo se muestra un método para detectar un LF faltante antes del EOF y anexarlo. Esto se debe hacer antes de que el certificado se cargue en iDRAC. 

// Before - certificate file not terminated with a LF before EOF

$ hexdump -C idrac_cert.pem | tail -n 5
000008a0  5a 69 78 41 65 53 30 42  34 43 6c 50 52 6b 68 44  |ZixAeS0B4ClPRkhD|
000008b0  52 46 64 2b 77 3d 3d 0d  0a 2d 2d 2d 2d 2d 45 4e  |RFd+w==..-----EN|
000008c0  44 20 43 45 52 54 49 46  49 43 41 54 45 2d 2d 2d  |D CERTIFICATE---|
000008d0  2d 2d                                             |–               |     // Missing LF before EOF -(CRLF) in this case {0d} {0a}

// Add Line-Feed to end of file. {0d} {0a} "\r\n" for CR-LF or just {0a} "\n" for unix Line-Feed. 

$ python3 -c 'with open("idrac_cert.pem","rb") as f: data=f.read();data += "\r\n".encode("utf-8");f = open("new_idrac_cert.pem","wb");f.write(data);f.close()'

// After - certificate file properly terminated with a LF before EOF

$ hexdump -C new_idrac_cert.pem  | tail -n 5
000008a0  5a 69 78 41 65 53 30 42  34 43 6c 50 52 6b 68 44  |ZixAeS0B4ClPRkhD|
000008b0  52 46 64 2b 77 3d 3d 0d  0a 2d 2d 2d 2d 2d 45 4e  |RFd+w==..-----EN|
000008c0  44 20 43 45 52 54 49 46  49 43 41 54 45 2d 2d 2d  |D CERTIFICATE---|
000008d0  2d 2d 0d 0a                                       |--..|

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