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Re: Reverse DNS-Lookup by cURL?

From: <>
Date: Mon, 7 Nov 2005 19:12:27 -0000

are you sure that it is curl that does the lookup, and not your tcp
traffic dumper?


On Mon, Nov 7, 2005, said:

> Hi everybody,
> thanks for this useful library, I already had a lot of fun with it :-)
> Ok, but now I�m confused. I run a HTTP-Client using cURL on several machines
> (Debian Linux), which use a connected mobile to retrieve content
> over-the-air.
> I give a proxy-IP and my interface-IP (given by the pppd), normally
> everything works fine (I think cURL does not need to do a DNS-Lookup as I�m
> using a proxy and there are no lookups in the trace).
> Now I set up a new machine, and there I can see in the traces, that before
> cURL tries to connect to the proxy, there are 2 Reverse-DNS-Lookups. Someone
> (cURL?) tries to get the names for both IPs, the given proxy-IP and the
> given interface-IP. I don�t know, why this does not happen on the other
> machines, as I�m 99% sure, that all machines are configured in the same way.
> So it would help a lot, if anybody could tell me, if cURL does these
> reverse-lookups, and, if it does, why and in which case. I have no idea, why
> a reverse-lookup is needed at all.
> Thanks in advance!
> Joachim
> --
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m. allan noah
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Received on 2005-11-07