Cannot resolve the smtp server. Check the smtp and dns

networking - DNS cannot resolve hosts - Ask Ubuntu 2020-7-9 · But I cannot run the update to fix the issue because it can't use DNS to conduct the update. Is there any documentation out there on how to get the DNS working again so i can run the update and fix the issue? I have tried changing the DNS server and everything and nothing is working. cat /etc/resolv.conf. nameserver nameserver CURLOPT_RESOLVE 2020-5-31 · Addresses set with CURLOPT_RESOLVE will not time-out from the DNS cache like ordinary entries. If the DNS cache already have an entry for the given host+port pair, then this entry will be removed and a new entry will be created. This is because old entry may have have different addresses or be ordinary entries with time-outs.

The problem is that i cannot resolve hostnames from the LAN, i tryed pinging with the console itself and it's working, both hostnames and ips, but when it comes to a pc connected to the lan i can only ping external ip addresses, like (and reach the pfsense web configurator).

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With your current nsswitch.conf, dns will only be requested if a request for wins fails. Here are the relevant excerpts from the nsswitch.conf manpage on my system: notfound The lookup succeeded, but the requested entry was not found. The default action for this condition is "continue". return Return a result now. Hi, I would like to request to explain nat and dns resolve.Firstly i would like to explain my scenario. I have local AD and i also have external domain website is host on external domain. Internal domain is use for user authentication and local dns.I have some servers hosted in The servers used for DNS resolution will be specified in the /etc/resolv.conf file, below is an example configuration of this file. nameserver In this case all DNS queries of our system will go to the DNS server at Other secondary and tertiary DNS servers can also be specified here as backups. Testing DNS This problem may occur if the DNS server is queried for a non-"A" record, and the server replies with an authoritative response that returns NXDOMAIN or NAME_ERROR (Response Code, or RCODE, 3) even though an "A" (or Internet Protocol version 4, or IPv4, host) record for the queried name exists on that DNS server. Sep 18, 2018 · The other option i have is to specify a DNS server but i am stuck here as i am not sure what is the IP i should use. The DNS server is running inside Fortigate itself. It is not a standalone DNS server. All my internal machine use their network's interface IP as the DNS server but i don't see an interface IP for SSL VPN. Jul 11, 2017 · Flushing your DNS cache can be a useful tool to resolve any host connection errors that you may experience with Google Chrome or other browsers. It is very simple to do and can be done directly in Chrome or from an Elevated Command Prompt window in Windows 7 or 8. It also works on any other pod running on the master, like kube-flannel, kube-proxy, etc.. However, any pods that are created on the workers cannot resolve DNS, likely because they can't reach the DNS service due to some problem with Flannel.