Tiêu đề này có chứa thông tin thêm về các gói dữ liệu và phương tiện được sử dụng để truyền tải nó, như thể hiện trong hình 10-7 khi giao tiếp với bạn bè. Giấy chứng nhận Nortel VPN Router máy chủ chỉ có một Subject Alternative Name nếu CA | 196 Chapter 5 ssh Enables SSH service ssl Configures SSL ssl-vpn system system-log-to-file telnet SSL-VPN Acceleration configuration mode Enables system settings Write system log to file Virtual terminal protocol to the system management IP address tunnel Enables the tunneling protocols . IPsec PPTP L2TP L2F tunnel-guard Enables to set tunnel guard properties user User configuration mode CLI Keystroke Shortcuts The Nortel VPN Router supports some keystroke shortcuts that can be used while in the CLI. Getting to know and understand these shortcuts can be very useful when navigating and editing within the CLI. Table 5-1 shows a list of these shortcuts and what function each of these provides. Table 5-1 CLI Keystroke Shortcuts 1 COMMAND DESCRIPTION 1 Ctrl A Moves the cursor to the beginning of the line. Ctrl B Moves the cursor back one character. Ctrl C Abort. Ctrl D Deletes a character. Ctrl E Moves the cursor to the end of the line. Ctrl F Moves the cursor ahead one character. Ctrl H Deletes the character to the left. Ctrl I Completes the command. Ctrl K Deletes all of the following characters. Ctrl L Re-displays the line. Ctrl R Re-displays the line. Ctrl N Moves to the next history command. Ctrl P Moves to the previous history command. Ctrl Q Escape. Ctrl T Transposes characters. Ctrl U Deletes the entire line. Ctrl W Deletes the entire word to the left of the cursor. Management Options and Overview 197 Table 5-1 continued 1 COMMAND DESCRIPTION 1 Ctrl X Deletes all of the characters to the left of the cursor. Ctrl Z Used to exit Global Configuration mode. Up arrow Moves to the previous history command. Down arrow Moves to the next history command. Accesses the help utility. Esc C Converts the character at the cursor to an uppercase character. Esc U Converts the character at the cursor to an uppercase character. Esc L Converts the character at the cursor to a lowercase character. Esc B Moves the cursor back one word. Esc D Deletes the word to the right of the .