Mikrotik dns max concurrent queries. [/u] [/i] Configs: ip dns pr servers: dynamic-ser… max-concurrent-queries=1000 (from 100 to 1000) for 4000 users are sufficient. A MikroTik router with a DNS feature enabled can be set as a DNS cache for any DNS-compliant client. Big DNS players do that, but for mikrotik and common use it has no purpose at all. 1,8. google/dns-query verify-doh-cert: yes allow-remote-requests: yes max-udp-packet-size: 50000 query-server-timeout: 2s query-total-timeout: 10s max-concurrent-queries: 1048576 max-concurrent-tcp-sessions: 1000000 cache-size: 1953163KiB cache-max-ttl: 1w cache-used OpenDNS is my preferred DNS service. Increasing numbers will alleviate problems for few moments (depending on your network size) and may still clog it out. When the remote requests are enabled, the MikroTik router responds to TCP and UDP DNS requests on port 53. [/u] [/i] Configs: ip dns pr servers: dynamic-ser… I had problem almost everyday, is the the mikrotik org the server i am connecting to?. The configured maximum number of concurrent DNS queries for a given server is reached. 0. 4,4. Typically, dnsmasq's 'Maximum number of concurrent DNS queries reached' warning was prompted by either a DNS loop of sorts or by dnsmasq's upstream resolvers being unresponsive or inaccessible. 2 - but the issue remains. Ответили на вопрос 3 человека. And I must flush cache. The only issues I've seen in the RouterOS logs (which happen intermittently) are: DoH server connection error: resolving error DoH server connection error: Idle timeout - connecting DoH max concurrent queries reached, ignoring query So maybe DoH shouldn't be used at all and instead just manually enter the desired DNS servers? Hello Mates, Using a CCR1036-8G-2S+ with 1k+ pppoe sessions who still use it as a DNS server (DoH). 38v is more settings in dns tab. Any info / assistance on this issue will be highly appreciated!. I’m getting a DoH max concurrent queries reached, query ignored. Discover our expert consulting services and comprehensive training programs designed for individuals and businesses. I have included my router DNS configuration if anyone is able to assist? Jun 21, 2024 · Jun 21 04:27:37 10. 8, 8. 2,4. 4, 1. This is how you can configure a MikroTik router for OpenDNS using DoH or DNS over HTTPS. 1. The latest stable version of RouterOS 6. [/u] [/i] Configs: ip dns pr servers: dynamic-ser… after some time MT stops resolving names - looking at logs you can see that you reached Max Concurrent Queries or Max Concurrent TCP sessions. 4 dynamic-servers: allow-remote-requests: yes max-udp-packet-size: 4096 query-server-timeout: 2s query-total-timeout: 10s max-concurrent-queries: 100 max-concurrent-tcp-sessions: 20 cache-size Those are my settings for 4000 Users, what not are present are set to default. The error i get vary, sometimes “DoH max concurrent queries… Hello Mates, Using a CCR1036-8G-2S+ with 1k+ pppoe sessions who still use it as a DNS server (DoH). 8. 8 Local Gateways /ip dns set allow-remote-requests=yes cache-max-ttl=30m cache-size=4096KiB max-concurrent-queries=256 servers=, CPE DNS service is key, specially client portion behaviour, as it’s the typical most fast/resilient setup, to point routers statically to internal cache (s) resorting to query outside DNS servers only as the last resort, putting the Mikrotik DNS Server as close to clients as possible. 2. 47 adds support for DNS over HTTPS or DoH. doh_max_server_connections (Number) Specifies how many concurrent connections to the DoH server are allowed. GitHub Gist: instantly share code, notes, and snippets. The system is either very busy at the moment or not receiving queries from the configured upstream. [/u] [/i] Configs: ip dns pr servers: dynamic-ser… I have been experiencing several errors on MikroTik router RB5009 as shown in the attached photos. concurrent TCP sessinos 20 Cache size 2048 Where do I look for the problem? Just configured DoH on my Mikrotik and ran DNS benchmark, is there a limit to the concurrent queries made to https://dns. Hello Mates, Using a CCR1036-8G-2S+ with 1k+ pppoe sessions who still use it as a DNS server (DoH). In this MikroTik Tutorial I will show you how to configure DNS over HTTPS on your MikroTik router using either Cloudflare DNS servers or Google DNS servers. [/u] [/i] Configs: ip dns pr servers: dynamic-servers: use-doh-server: https://dns. How much DNS query per second can handle ROS? Its some SW limitation in ROS or can use all resources up to 100% CPU? And can use only one CPU or all CPUs in system? T… Learn how to configure DNS in Mikrotik. 10. The MikroTik RouterOS DNS cache has an additional embedded DNS server feature that allows you to configure multiple types of DNS entries that can be used by the DNS clients using the router as their DNS server. Moreover, the MikroTik router can be specified as a primary DNS server under its DHCP server settings. DNSMASQ_WARN: Maximum number of concurrent DNS queries reached (max: 150) Since some paths for the configuration of the pi-hole under Diet-Pi are slightly different, I would like to ask my question here in this forum. Improve network performance, security, user experience with DNS configuration tutorial in Mikrotik. Can anybody tell what is ideal settings for dns server? I have this one servers: 8. 1, 4. Concurrent TCP Sessions in DNS settings ?, default is 20 how can i adjust the settings for better experience ? I have on my mikrotik setup dns server but in new 6. I have included my router DNS configuration if anyone is able to assist? Explore MikroTik DNS/Content Filtering solutions for enhanced network performance and security. Kind regards, French Fries Oct 10, 2024 · I have sometimes slow dns queries. 36). Then it si work for day or two. 3,8. Cloudflare DNS-over-HTTPS problems the last couple days? I have my RB4011 set up to use Cloudflare's DoH server. Оцените лучшие ответы! И подпишитесь на вопрос, чтобы узнавать о появлении новых ответов. 8 dynamic-servers: allow-remote-requests: yes max-udp-packet-size: 4096 query-server-timeout: 2s query-total-timeout: 10s cache-size: 10240KiB cache-max-ttl: 1w cache-used: 243KiB [admin@xxx] /ip dns> There is list of DNS servers where it Настройка VPN-туннеля VLESS на роутере MikroTik. [admin@xxx] /ip dns> print servers: 10. nextdns. 8,8. I have max . TCP sessions I would be tempted to keep at default or possibly reduce as TCP dns connections should only occur when the data is too large to fit in a UDP packet and should be rare. concurrent queries 100 max. DNS over HTTPS for Mikrotik routers Year is 2023 and most of the internet traffic is done via HTTPS (secured) but most home connections use their ISP DNS that is, in 90% of the cases unsecured. io? DoH max concurrent queries reached, query ignored. Почему вы решили, что DNS кэш РоутерОс на флеше держит, а не в ОЗУ ? Проверил: поставил размер кэша 64K (через терминал, винбокс менее 512К не дает), сбросил DNS кэш виндовс, DNS сервер один - микротик. Servers are processed in a queue order - static servers as an ordered list, dynamic servers as an ordered Is this for home use or are you running an office or larger with it? Is the tik exposed to the internet? Realistically I would bump the concurrent queries to some multiple of the expected number of clients. 254 dns,warning ccr2004-1g-12s: DoH max concurrent queries reached, ignoring query [ignoring repeated messages] I tried this, doubling figures of DNS DoH max queries : I have no idea what figures to enter to raise the limit. Elevate your network management with certified MikroTik consultants and tailor-made DNS solutions. -DoH server connection error: resolving error: untuk mengatasi masalah ini anda perlu menambahkan static dns di mikrotik agar mikrotik berhasil melakukan resolv ke server doh untuk ip dns nya The last time it happened, I fixed the issue by removing the DNS servers, rebooting the router, then re-adding the exact same DNS servers, however this method has stopped working now. [/u] [/i] Configs: ip dns pr servers: dynamic-ser… Hello Mates, Using a CCR1036-8G-2S+ with 1k+ pppoe sessions who still use it as a DNS server (DoH). max-concurrent-tcp-sessions=40 (from 20 to 40) TCP is rarely used, 40 for 4000 users are sufficient. I've tried using various DNS servers - 8. 1 We have DNS server on our Mikrotik (RouterOS 6. max-concurrent-queries: 1048576 Could it be possible you have incorrectly configured the firewall and your DNS server is open to public? This number ir much higher than you claim you have users. Jan 16, 2026 · max-concurrent-tcp-sessions: 20 cache-size: 2048KiB cache-max-ttl: 1d cache-used: 48KiB Dynamic DNS servers are obtained from different facilities available in RouterOS, for example, DHCP client, VPN client, IPv6 Router Advertisements, etc. The past two days I have had lots of problems with DNS requests, where my local devices were getting no responses to DNS queries (pointing to my RB4011 as their DNS server). Main DNS server and Backup /ip dns set allow-remote-requests=yes cache-max-ttl=30m cache-size=81920KiB max-concurrent-queries=1000 max-concurrent-tcp-sessions=40 servers=1. Hi, I have question about DNS cache performance. On my RB1100AHx4. doh_timeout (String) Specifies how long to wait for query response from the DoH server. 40. DoH is a protocol for performing remote DNS over HTTPS protocol. 90. [/img]What Changes will my clients experience if i changed the value of Max. 4. In my never ending quest for root causes , is it possible I could convince you two, @erayrafet and @Neverends4, to try some experiments? A MikroTik router with a DNS feature enabled can be set as a DNS cache for any DNS-compliant client. It is a separate section of reply, which is attached by the DNS server without client's request. I have been experiencing several errors on MikroTik router RB5009 as shown in the attached photos. cml9ht, zfp1df, eg7zkx, a2xadn, of5yxy, 3yhc, huqcde, 9xwbj, chbup, ar9y,