ZyXEL Communications ZyWall USG20-VPN, Руководство пользователя

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Chapter 36 Troubleshooting
USG20(W)-VPN Series User’s Guide
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• Binary X.509: This is an ITU-T recommendation that defines the formats for X.509 certificates.
• PEM (Base-64) encoded X.509: This Privacy Enhanced Mail format uses lowercase letters,
uppercase letters and numerals to convert a binary X.509 certificate into a printable form.
• Binary PKCS#7: This is a standard that defines the general syntax for data (including digital
signatures) that may be encrypted. A PKCS #7 file is used to transfer a public key certificate. The
private key is not included. The USG currently allows the importation of a PKS#7 file that
contains a single certificate.
• PEM (Base-64) encoded PKCS#7: This Privacy Enhanced Mail (PEM) format uses lowercase
letters, uppercase letters and numerals to convert a binary PKCS#7 certificate into a printable
form.
• Binary PKCS#12: This is a format for transferring public key and private key certificates.The
private key in a PKCS #12 file is within a password-encrypted envelope. The file’s password is not
connected to your certificate’s public or private passwords. Exporting a PKCS #12 file creates this
and you must provide it to decrypt the contents when you import the file into the USG.
Note: Be careful not to convert a binary file to text during the transfer process. It is easy
for this to occur since many programs use text files by default.
I cannot access the USG from a computer connected to the Internet.
Check the service control rules and to-USG security policies.
I uploaded a logo to display on the upper left corner of the Web Configurator login screen and
access page but it does not display properly.
Make sure the logo file is a GIF, JPG, or PNG of 100 kilobytes or less.
I uploaded a logo to use as the screen or window background but it does not display properly.
Make sure the logo file is a GIF, JPG, or PNG of 100 kilobytes or less.
The USG’s traffic throughput rate decreased after I started collecting traffic statistics.
Data collection may decrease the USG’s traffic throughput rate.
I can only see newer logs. Older logs are missing.
When a log reaches the maximum number of log messages, new log messages automatically
overwrite existing log messages, starting with the oldest existing log message first.