ftp and dns

[Wilfred Chau_1]

I had a slow dns server which will response a query in about 2-5 seconds.

When I ftp to a site, it failed with "host not found". What is the timeout value for name resolution?

[RAC_1 · Accepted solution]

Is the dns server a hp-ux server?? If yes, look at the man page of resolver

man 4 resolver

It talks about the details that you want.

Anil

[Sanjay_6]

Hi,

You can try the retrans parameter in /etc/resolv.conf,

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000069154806

The itrc doc id is NR0500KBRC00002433.

Hope this helps.

Regds

[Wilfred Chau_1]

the first hop is a hpux dns and then the request is sent to an NT dns server.

[Jeff Schussele]

Hi Wilfred,

The default for a single DNS request alone is 5000 milliseconds but can be overridden by the res_init() & set_resfeild() functions (see man 4 resolver) or the retrans XXXX or retry X variables in the resolv.conf file.
But remember if there are multiple DNS servers in use OR there are other resolvers in play the time can be much longer.

HTH,
Jeff