Zyxel-communications 5 Series Instrukcja Użytkownika Pobierz pdf (Strona 445)

100

101

ZyWALL 5/35/70 Series User’s Guide

Chapter 25 DNS 445

25.7 DNS Cache

DNS cache is the temporary storage area where a router stores responses from DNS servers.

When the ZyWALL receives a positive or negative response for a DNS query, it records the

response in the DNS cache. A positive response means that the ZyWALL received the IP

address for a domain name that it checked with a DNS server within the five second DNS

timeout period. A negative response means that the ZyWALL did not receive a response for a

query it sent to a DNS server within the five second DNS timeout period.

When the ZyWALL receives DNS queries, it compares them against the DNS cache before

querying a DNS server. If the DNS query matches a positive entry, the ZyWALL responses

with the IP address from the entry. If the DNS query matches a negative entry, the ZyWALL

replies that the DNS query failed.

25.8 Configure DNS Cache

To configure your ZyWALL’s DNS caching, click ADVANCED > DNS > Cache. The screen

appears as shown.

Figure 236 ADVANCED > DNS > Cache

1 2 ... 440 441 442 443 444 445 446 447 448 449 450 ... 834 835

Komentarze do niniejszej Instrukcji

Brak uwag

Zyxel-communications 5 Series Instrukcja Użytkownika Strona 445

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Sprzęt komputerowy Zyxel-communications 5 Series