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- Forwarders
- Introduction
-
- Your DNS may have difficulties to do name resolution outside of the
- domain it manages. It may defer this work to another DNS which will do
- the work and return the result to it.
-
- 11.. WWhhyy ddooiinngg tthhiiss
-
- If your DNS is behind a firewall, it can't reach the _I_n_t_e_r_n_e_t. It
- can't fulfill one of its main task, which is to provide name
- resolution (its a DNS where S stand for server :-) ). By pointing to a
- forwarder (often a caching only DNS running on the firewall itself),
- the problem is solved.
-
- Another reason appear when a DNS is located at the end of a slow link.
- Instead of trying to solve itself all the query it will send the
- request to a forwarder at the other end of the link. Often the second
- DNS has a higher usage than the first, thus already has a greater
- knowledge. It is in position to answer the query right away using its
- large cache.
-
- 22.. TTaasskk
-
- Just enter the IP address of the DNS you want to use. The order is
- important. Put the best first. Put more than one as backup.
-
- 33.. WWhhaatt hhaass ttoo bbee ddoonnee ttoo aa DDNNSS ssoo iitt aacccceepptt ttoo pprroocceessss ffoorrwwaarrddeedd
- rreeqquueessttss
-
- NNootthhiinngg..
-
- 44.. //vvaarr//nnaammeedd//rroooott..ccaacchhee
-
- If your DNS is deferring request to another DNS, the file
- //vvaarr//nnaammeedd//rroooott..ccaacchhee is not needed!
-
- WWrroonngg!!
-
- This file provide the bootstrap knowledge required to resolve name in
- other domain. Without this file, your DNS will simply think that
- nothing else exist except the domains it serves. It won't look
- further.
-
- This is why _L_i_n_u_x_c_o_n_f always try to add it to your DNS configuration!
-
-