A bunch of stuff is enabled when you specify a helper address. You have to
use no ip forward-protocol to disable the ones you don't want. Here's the
list of what gets enabled by default:
TFTP (69)
DNS (53)
Time (37)
NetBIOS naming service (137)
NetBIOS datagram service (138)
DHCP (BOOTP) Server
I get it and just know there are DNS clients will send broadcast to locate DNS
Server for resolving queries. Before I don't know there exists such
implementation. The working environment to me is so ordered that I have no
this experience client will broadcast DNS query. All clients either have the
Ask Cisco! They configured it that way.
-brad
""Fanglo P.M. MA"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Does any know why UDP DNS is enabled by ip forward-protocol by default
> when ip helper-address is specified?
>
> Best regards,
> Fanglo MA
>
>
Does any know why UDP DNS is enabled by ip forward-protocol by default
when ip helper-address is specified?
Best regards,
Fanglo MA
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