Re: [dnsdist] rules to block dns tunneling trafic from iodine, dnscat2, ...

2023-10-29 Thread Aleš Rygl via dnsdist
Hi Denis, Thanks a lot for sharing your rules! See some comments below. On 05. 07. 23 10:19, Denis MACHARD via dnsdist wrote: -- Update the dynamic blocks with refused reply by default setDynBlocksAction(DNSAction.Refused) I was using DNSAction.Refused as well, later on I moved to

Re: [dnsdist] dnsdist 1.7.4 Debian Bullseye vs 1.8.4 Bullseye

2023-10-09 Thread Aleš Rygl via dnsdist
Hi On 05/10/2023 10:41, Aleš Rygl via dnsdist wrote: Thanks for your response. After some deep documentation reading and config tweaking I am nearly on the previous values regarding CPU load, apart from latency, which is still higher (1.3ms -> 2.3ms). I suspect a different

Re: [dnsdist] dnsdist 1.7.4 Debian Bullseye vs 1.8.4 Bullseye

2023-10-05 Thread Aleš Rygl via dnsdist
Hi Remi, On 02. 10. 23 13:53, Remi Gacogne via dnsdist wrote: Hi Ales, On 25/09/2023 16:09, Aleš Rygl via dnsdist wrote:     I would to kindly ask for help or and advice. I have just upgraded one of our dnsdist instances from 1.7.4 do 1.8.4 together with OS upgrade (Debian 11.7 to 12.1

Re: [dnsdist] dnsdist 1.7.4 Debian Bullseye vs 1.8.4 Bullseye

2023-09-25 Thread Aleš Rygl via dnsdist
Ah, I am sorry, the subject should be  1.7.4 Debian Bullseye vs 1.8.1 Bookworm. I am running 1.8.1 on Bookworm... Ales On 25. 09. 23 16:01, Aleš Rygl via dnsdist wrote: Hello,     I would to kindly ask for help or and advice. I have just upgraded one of our dnsdist instances from 1.7.4 do

[dnsdist] dnsdist 1.7.4 Debian Bullseye vs 1.8.4 Bullseye

2023-09-25 Thread Aleš Rygl via dnsdist
Hello,     I would to kindly ask for help or and advice. I have just upgraded one of our dnsdist instances from 1.7.4 do 1.8.4 together with OS upgrade (Debian 11.7 to 12.1). Everything works fine, no issues observed apart some deprecated config references. What is a big surprise to me is

Re: [dnsdist] dnsdist 1.5.1 on Debian 10.8: snmpd socket and privileges

2021-02-23 Thread Aleš Rygl via dnsdist
On 23. 02. 21 20:29, Mark Moseley via dnsdist wrote: On Tue, Feb 23, 2021 at 7:49 AM Remi Gacogne via dnsdist mailto:dnsdist@mailman.powerdns.com>> wrote: Hi Aleš, On 2/23/21 4:35 PM, Aleš Rygl via dnsdist wrote: > My idea was that changing mode of agentx directory abo

[dnsdist] dnsdist 1.5.1 on Debian 10.8: snmpd socket and privileges

2021-02-23 Thread Aleš Rygl via dnsdist
Hello, I am struggling a bit on dnsdist after upgrade to from 1.4.0 to 1.5.1. I am using Debian 10.8 and dnsdist with SNMP support enabled. It looks like dnsdist systemd unit file forces dnsdist to drop privileges to _dnsdist user and _dnsdist group in 1.5.1: [Service]

[dnsdist] DoT/DoH - how to disable TLS < 1.3

2019-11-28 Thread Aleš Rygl
Hello, I would like to to disable TLS versions in DoT/DoH lower than 1.3 from security reasons. I am trying to use: addTLSLocal('0.0.0.0', '/etc/dnsdist/cert.pem', '/etc/dnsdist/key.pem', { minTLSVersion='tls1.3', provider='OpenSSL' }) It seems that it does not work: when testing with

Re: [dnsdist] SNMP Support

2019-11-23 Thread Aleš Rygl
On 22. 11. 19 20:08, Chris Hofstaedtler | Deduktiva wrote: * Brian Sullivan [191122 17:18]: Hi, I am trying to configure the snmpAgent in dnsdist and get the following log message. NET SNMP support is required to use snmpAgent() I am running dnsdist 1.4.0-rc5. I assume that NET SNMP support

[dnsdist] dnsdist - Bad file descriptor

2018-05-22 Thread Aleš Rygl
Hi all, I am facing a bad file descriptor message when preparing our new configuration where dnsdist is listening on multiple interfaces. The situation is following. dnsdist is running on a sever with three bond interfaces. Two of them have two IPv4 and IPv6 address on  them and are used for

[dnsdist] dnsdist - choosing CPU for a new server

2018-05-03 Thread Aleš Rygl
Hi all, It looks like that even in these days when everything is running in a virtual environment I will get a new physical hardware (!) for dnsdist servers. So I would have a question related to CPU selection. Is it better to have rather more CPU cores or less cores with running on higher

[dnsdist] dnsdist 1.3.0 - counters in Web GUI

2018-04-03 Thread Aleš Rygl
Hello dnsdist guys! 1st of all let me thank you for a new dnsdist version. I am really appreciating your effort. Thanks! I have noticed a small flaw after the upgrade from 1.2: counters are shown with a really lot of decimal places which makes it hard to read. See below. #    Name   

[dnsdist] Tweaking kernel paramaters for heavy loaded site with dnsdist

2017-02-20 Thread Aleš Rygl
Hi all, I would like to ask you for recommendations regarding network performance optimization for a server running Linux with dnsdist. I am still experincing RcvbufErrors even if my setting for receive/send buffers is far from default: ~# sysctl -p net.ipv4.conf.all.log_martians = 1

[dnsdist] dns-spider

2016-07-11 Thread Aleš Rygl
Hi dnsdist users. I would like to share a little finding with you. We have been suffering from pseudorandom subdomain attacks fo more than two years mainly because openresolvers in crappy CPEs of our customers. While analyzing the DNS traffic using topResponses in dnsdist (thanks!) I have