Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Abed_AL-R_26070's avatar
Abed_AL-R_26070
Icon for Nimbostratus rankNimbostratus
Oct 31, 2018

PEM signatures update

Hello I'm getting this error message when trying to update PEM signatures: Signature file server cannot be reached (No response from update server). Please download the DPI Signatures file and ins...
application delivery
big-ip
security
Abed_AL-R's avatar
Abed_AL-R
Icon for Cirrostratus rankCirrostratus
Oct 31, 2018

I noticed the following :

 tailf /var/log/wr_urldbd.out
GetRtuUpdate() failed nDownloadRtuUpdate() call with error 1
pInitializeSsl: certificate file: /etc/wr_urldbd/thawteCA.pem
failed connect to dnfaxo4v1uknq.cloudfront.net on 443, err = -1
BcCloudfrontDownload: Failed connect to database.brightcloud.com on 443
GetRtuUpdate() failed nDownloadRtuUpdate() call with error 1
pInitializeSsl: certificate file: /etc/wr_urldbd/thawteCA.pem
failed connect to dnfaxo4v1uknq.cloudfront.net on 443, err = -1
BcCloudfrontDownload: Failed connect to database.brightcloud.com on 443
GetRtuUpdate() failed nDownloadRtuUpdate() call with error 1
pInitializeSsl: certificate file: /etc/wr_urldbd/thawteCA.pem
failed connect to dnfaxo4v1uknq.cloudfront.net on 443, err = -1
BcCloudfrontDownload: Failed connect to database.brightcloud.com on 443
GetRtuUpdate() failed nDownloadRtuUpdate() call with error 1

What this problem might be ?