On 4/29/19 11:19 AM, Carlos E. R. wrote:
On 29/04/2019 18.14, Dutch Ingraham wrote:
Hi all:
I have a question about some DNS querys/responses that continue after the application that originally requested them is closed.
I am running Tumbleweed (20190426 snapshot)on x86_64, Firefox version 66.0.3.
The Setup: run Firefox and browse multiple sites. Close Firefox. Open Wireshark. Note multiple DNS querys/responses are still being made from/to some process (Firefox does not appear in a ps query) related to the sites just visited.
In a recent test, I surfed to seven different websites in three minutes, closed Firefox, opened Wireshark, and noticed 32 DNS queries and 32 responses, all related to sites I just visited (and their "partners").
Letting Wireshark run, this same sequence was repeated every few seconds for 10 minutes, when I closed Wireshark. I have no idea how long this process will continue.
I have also tried this same test on Fedora and OpenBSD, with the same version of Firefox, with the same configuration, and the issue does not present.
I don't happen to prefer this behaviour, so I have two questions:
1. Why is this happening on OpenSuSE? 2. How do I disable it?
All constructive replies are greatly appreciated!
Wild guess.
There is some DNS cache app running, which has an entry for "somesite" that has a short lifetime. Maybe that DNS cache app refreshes the IP before the timeout in order to have it ready for any application requesting it.
Thanks, Carlos. I'm sure you are correct, but identifying that cache app is the harder part. I took an uninformed chance that it may be systemd-resolved, which caches by default, and provides for turning the caching off, but that had no apparent effect on the issue. BTW - I started wireshark about 4 hours later, and the same DNS queries were still being made. There must be some kind of timeout, but hard to say what it is set to until the offending daemon is properly identified. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org