Nslookup works but ping fails linux.

• Nslookup works but ping fails linux Dig fails because your server is not registered to dns. ping resolves addresses using getaddrinfo , which uses Name Service Switch , configured by /etc/nsswitch. nslookup works: PS C:\Users\Administrator> nslookup nuget Server: ad-01. <any DC server> works correctly. If this test fails, try the ping command with the remote IP address: $ ping -c 3 192. When I am trying to ping a particular domain it returns me "Unknown host" but when I run nslookup on that same host immediately it returns me the correct IP. Jul 13, 2023 · nslookup works fine; dig works fine; ping only works with ip address, not with domains; wget and curl also fail to resolve /etc/resolv. com'. Laptop is connected to our company VPN (Juniper Network Connect 7. mycompany. nslookup <any FQDN>. b. 1) on the network 10. There are two DNS Search suffix's (domain1. com, after a fresh ipconfig /flushdns : Jun 22, 2024 · This is very strange behavior on a fresh installation of Alpine Linux v3. 4 and 8. 05-arm-linux-gnueabihf ] Dec 1, 2008 · When you ping the fully qualified name of the server this should then work. 53, nslookup works, but ping still fails. When I execute “ping XXX” on Windows 11 (24H2), it returns “Ping request could not find host XXX” (XXX is my company’s internal network domain name), but when I execute Jun 30, 2016 · Expected behavior Ping to an internal host (a host that’s resolved by company dns) should succeed from within a container. 4 Address: 10. May 29, 2018 · I am trying to complete an nslookup for a number of hosts on an affiliated domain, but all nslookups fail. 61 ms I use ping as an example because it's simple, but most of the other tools I need to use show the same results as ping. 1; ping myhost1 -> bad address; wget myhost1 -> bad address; wget google. Jul 5, 2020 · When I try and devices on my network by name they fail to resolve. com -> works; cat /etc/resolv. Jan 4, 2025 · A common instance of this phenomenon occurs in Microsoft Windows environments, where "nslookup" returns results while "ping" commands fail. 103): icmp_seq=1 ttl=64 time=4. g. ping and curl are trying to get an actual IP address but the answer to the resolution jenkins-deb-builder. It is part of libc, and man nsswitch. 120. 103) 56(84) bytes of data. The ping command sends packets of information to the IP address or the domain and checks for replies. service. google. For instance, immediately after every reboot, i can't nslookup anything. Mar 13, 2023 · I understand that Ping and NSLookup do not use the same resolution methods. conf to use nameserver 1. 8 ms But the nslookup (or host ) commands don't work without the FQDN: Aug 4, 2019 · I noticed some strange behaviour when setting up a web server on a local network. Mar 28, 2022 · host, dig and nslookup can resolve domain names to IPs e. conf" file shows the intended DNS server first on the list, and "127. com:80 * Couldn't resolve host 'google. After Ctrl + C i try nslookup again and now it works fine. com" that I get "unknown host". nslookup on the other hand defaulted to doing an lookup over IPv6, which by the look of things probably isn't configured correctly, hence no reply. nslookup targetHost 208. conf? Feb 16, 2020 · Ping works because you are using a host file to resolve the name. In this container, I can ping external IPs successfully. km is a CNAME ( mailtest-4. 151. 227. e. I also found this thread which may or may not be of any use to me. Apr 4, 2022 · If this succeeds and name resolution works, you probably don't need to continue along this line of testing. Oct 4, 2023 · This is an unusual workaround, but it worked for some users. Most other software uses it. Both ping and nslookup work from the Mac: Mac$ nslookup internalhost. Is there an equivalent to Resolve-DnsName in Linux? Clarification: Jul 4, 2021 · Since today, whenever I use any docker container with the bridge network interface, DNS resolutions seem to fail for certain utilities. amazonaws. corp. I found that if I instead ping a hostname with May 25, 2015 · nslookup only does proper DNS resolution, which is significantly different from the Name Service Switch subsystem that your other applications use; that is to say nslookup ignores /etc/hosts and mDNS. 200. Nslookup works by both name Feb 12, 2025 · Hi, I’ve encountered a problem. When I nslookup 10. com, it always return ping: bad address 'google. @Scaine dig, host and nslookup do not use the name service switch (as they don't need to consider other name service mechanisms than DNS). 239. com (18. Do not edit. Depending on how security is setup on your dns server you will need to manually add it or if the dns server allows updates use nsupdate. Nov 19, 2018 · Waiting for help, My machine is running Linux Cent OS 7. I have an Active Directory / DNS(10. com' But when I saw David T's post here, I decided to try it with curl. 222. nameserver 192. conf file) whereas these other tools talk directly to DNS servers listed in /etc/resolve. However, for the forwarded entries, nslookup succeeds, but ping fails, and no external internet sites can be accessed. All my other devices have the DNS Settings given by the main router via DHCP. conf has to include dns for host. To test local resolutions like that, use something that uses NSS. Like so: bridgetown:/etc # ping ontario ping: unknown host ontario bridgetown:/etc # host ontario ontario. co. May 2, 2023 · nslookup myhost1 -> 10. The Linux resolver randomises between entries in resolv. nslookup wolfman (name server lookup: wolfman) sends the hostname (wolfman) to the DNS (domain name system) to obtain the corresponding IP address. The nslookup command works, indicating that the DNS service is reachable and can resolve domain names. 2. What I don't know is how to diagnose what macOS is doing incorrectly. It's only when I ping the server's fully-qualified domain name "server01. dev. 8 Dec 7, 2016 · dig command not working whereas ping and nslookup works fine Hi, My scenario is as below. com, domain2. I can nslookup and dig an internal hostname, and I get a rapid response, but I cannot ping or ssh to the server. 101. com' * Closing connection #0 curl: (6) Couldn't resolve host 'google. Apr 25, 2019 · Recently I recognized that at one network sometimes but not always the first DNS lookup fails, but the second one is able to resolve the name: pi@pi:~ $ ping api. The Problem: Windows clients cannot browse with an active wireguard tunnel. The "/etc/resolv. 20 Name: nuget. local - also fails with ping could not find host; IPConfig /displayDNS - lists host1 as Name does not exist; NSLookup host1 - works fine and resolves router Dec 19, 2023 · In such a situation, we could use two command line tools: ping and nslookup. 27 Server: 192. ext and nslookup host. 11. 55 I am puzzled Jul 4, 2008 · Re: Dig / NSLookup work, ping fails Originally Posted by HalPomeranz Without the trailing dot ("ping laptop1") your machine is actually trying to do a lookup for "laptop1. However a ping -a of the iPaddress will resolve to the correct name. km ) and that canonical name doesn't resolve to an IP address, that's why those tools cannot get an IP address. domain. com to 172. For Nov 4, 2016 · dig doesn't work for all of them - your second nameserver (200. 5. Mar 26, 2013 · We have an intermittent problem on Windows 8 whereby Ping fails to find the host but NSLookup resolves it correctly. I ran into the same issue and it turns out that busybox is picky about the format for resolv. This is the sole purpose of the nslookup command. nslookup Nov 28, 2011 · Dig and NSlookup works, but curl fails. ext fail. When I edit /etc/resolv. 222 (openDNS), though it sounds like public resolution is working fine. nslookup specifically issues DNS requests; by default, it contacts the name servers configured in /etc/resolv. For example, here are the results for www. My question: What are Resolve-DnsName and ping doing differently than nslookup? My main problem is when I try to resolve the IP in Linux. So here’s my setup. For instance, if I run: sudo docker run --rm \\ --cap-add= May 11, 2023 · I see Why is 'ping' unable to resolve a name when 'nslookup' works fine? but it relates to Windows and the recommendations don't makes sense for the Mac. 40): icmp_seq=1 ttl=58 time=47. conf . conf within the pods. company. command and check if that works. This works fine in the browser, and also when I use ping. com) or ping an domain do not work. I can ping external IP addresses (e. com ping: unknown host api. If this fails, the local and remote systems don't have network connectivity between them. 20. Information I have an internal host internalhost. com: No answer Aug 10, 2017 · I'm experimenting with a Win10 IoT board that runs a web interface on minwinpc. 238) for every domain that does NOT exist. This works already, so we have verified that the DNS works and that wolfman indeed corresponds to Jul 8, 2019 · This is a weird one: Environment: Single Windows 2016 DC (Win 2012 functional level) DHCP DNS Multiple 2008 and 2012 R2 servers (Files, SQL, ERP) Mix of Windows 10 and Windows 7 clients Issue: I have just one of 40 computer that is unable to connect to any of the file servers or internal resources, however it has no issue with resolving external servers and website and getting email from O365 Feb 17, 2012 · I would try to nslookup other local hosts, to see if the LAN DNS is functioning. 1 instead of nameserver 127. twilio. conf is: # This file is managed by man:systemd-resolved(8). Sep 7, 2010 · Now when I try to ping a server in my LAN, its name is not resolved. I can ping the DNS servers (by IP address). conf on the command line will give you rationale and overview. Jul 23, 2022 · nslookup and ping don’t use the same mechanisms to resolve host names. conf is not being examined by ping for name servers. Pinging the IP works fine. com (192. I am using push "dhcp-option DNS 10. 68 (and I can ping that too), and tcpdump does show both a query and a reply. when i tried typing the hostname into a browser it redirected me to a url on the internet, so naturally i tried pinging it using the hostname but it didn't work, whereas the ip is fine. 17 Ping fails: PS C:\Users\Administrator> ping nuget Ping request could not find host nuget. 155) 56(84) bytes of data. Feb 3, 2022 · ping asked the OS to resolve google. local). Jan 29, 2018 · Windows 10 DNS lookup works via nslookup, but ping and other application based attempts to local network resources fail. I've tried several nslookup and dig command to no avail. search. 10. 6, I get "server01. 8. When I ping the server's IP address, I get a response. ping and nslookup works fine. 64 bytes from server001. Dec 26, 2023 · If nslookup works but ping fails, it means that your computer can resolve the domain name to an IP address, but it cannot connect to the server at that address. CentOS can ping 8. 217. I know that ping will use the OS to resolve the name, whereas dig/host will go to the DNS server directly. 10 nameserver 1. 0). If they nslookup the same hostname then it returns the correct details from the local LAN DNS. The whole issue revolves around the fact that the vendor software checks to see the target is alive before allowing connection, and I’m assuming it uses ping method because it gives a warning it can’t reach the target host and won’t let you connect. Linux clients have no problems resolving DNS queries with a wireguard tunnel using the domain controllers as DNS servers. 12. I have two different FreeBSD servers (different hosting companies), both exhibit this same behavior: They pick a specific IP address (216. Explanation. 8, DiG resolves www. com * getaddrinfo(3) failed for google. com, it will tell me can't resolve 'google. Ping fails but nslookup works. 40) 56(84) bytes of data. 64 bytes from 10. com, and the OS decided that it's going to return the IPv4 address to ping, probably because its IPv6 connection wasn't working. Nslookup works fine when resolving the name of the machine and pinging works w/out issue for both IP and name. local has address 192. This article dives deep into the reasons behind the issue where "Nslookup works but Ping fails in Windows 11 and 10" and offers comprehensive steps to troubleshoot and resolve it. when issuing commands like wget/curl/dig, there's DNS request for URL, but DNS always failed to response. com PING nlb-api-public-c3207ffe0810c880. 224. 4#53 *** Can't find dc1-main. dig @8. Both ping host. com PING server001. When I nslookup server01. However, nslookup behaves very strangely: nslookup <any FQDN> <any DC server> works incorrectly, appending example. If this works, connectivity exists. CheeseandWhine"-- it appends the domain name listed on the "search" configuration line in /etc/resolv. But when I tried to ping domain names, e. The usual explanation is that the connection is due to NetBIOS however in this case Resolve-DnsName -DnsOnly should preclude that explanation. conf by default and I'd guess your ping has hit the failing resolver. 0 directly onto a VM. 1" last. There are two Microsoft Active Directory Domain Controller's (one DC for parent domain with DNS server and another DC for child domain without DNS server. [ busybox master (git hash 349d72c19) sysroot-glibc-linaro-2. dig, host etc will resolve the hostnames on macOS and other machines fine (and nslookup works fine on all machines). From that laptop, while connected, nslookup polls the correct DNS server, returns the right IP. 05-arm-linux-gnueabihf ] Feb 13, 2015 · Ping: $ ping server ping: unknown host server $ ping server. Jun 11, 2016 · After a strange glitch with a DNS-server on our network, the ping command returns "Unknown Host," but the dig (or nslookup) commands promptly produce a NOERROR response from the server. If the ping by IP address succeeds but the ping by name fails, it's probably a name resolution problem. One easy way to verify WINS resolution (since there isn't a standard "winslookup" type utility) is to ping the target host: ping sh-server Apr 9, 2024 · Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Feb 25, 2014 · I am using Mac OS X 10. adelior. conf. ping <hostname> for example. You could also try to nslookup the hostname in question on a public DNS i. 1 The local IP is my local PiHole, which I mainly use as a local DNS Server. There must be exactly one blank between the nameserver tag and the address for nslookup to work. However, pinging or wget or apt-get refuse to connect to anything, even though they do the ip lookup correctly. Apr 17, 2023 · But I cannot find an equivalent flag for ping in Linux. But all these operations can be done successfully in the VM (outside of the container). docs. 4. google. 40 (10. All external hostnames work fine for both ping, ssh, dig or nslookup. net Aug 2, 2022 · If the ping by name fails, try a ping by IP address. 8 google. 4, however, i found that DNS works for ping and nslookup but wget/curl/dig failed always. Apr 4, 2024 · One of my Fedora systems will often fail to do DNS resolution. I am running an OpenVPN server but when Windows 10 clients connect they cant ping hostnames on the internal LAN (but can ping via IP). 1). uk) and resolves to the same, unknown public IP address. com pi@pi:~ $ ping api. 25-2018. 211. Actual behavior Ping hangs from within the container, even though nslookup succeeds from within the container. 1" which is my local LAN DNS. So for instance: # curl -v google. Ping host1 - fails with ping could not find host; Ping host1. 1. The issue could be a cable, switch, router or firewall problem. How can ping and the browser possibly get the IP if the more basic tools fail to do the resolve? Jan 30, 2017 · To answer why there is a difference in behaviour between ping on one side and nslookup and dig on the other side – ping uses libc resolver (which honours /etc/nsswitch. 0. 27 But when I do $ ping pi2w ping: pi2w: Name or service not known So it appears that the Pi is serving names correctly, but resolv. So while this fails: Mar 6, 2020 · From my x86_64 Slackware/Absolute box, I can lookup hosts: $ nslookup pi2w 192. We open the Command Prompt window after searching through Windows search and use these commands. ping <website name>, nslookup <website name>. Feb 7, 2023 · The ping command works fine: $ ping some-server PING some-server. Eg. local. 0/24. The ping works but not when the Nslookup fails with "connection timed out; no servers could be reached". 2 in your example) isn't resolving the record. 6. DNS on router set to 4. I am sure DNS server is okay. net. When I try and ping or wget or even apk update, it will always fail to resolve the domain name unless I manually run an nslookup command fi Jan 28, 2014 · Hello everybody!!! I’m working on my final project and it consists of doing a small network with Active Directory, DNS, DHCP, FW, DMZ, Exchange, etc, etc… Right now, I’m having a little problem with my DNS and my DMZ. com dig @8. Understanding Nslookup and The commands curl and ping also do not work from the workstation. In addition /etc/nsswitch. UPDATE Someone requested this info % nslookup -q=AAAA dc1-main. By all accounts, the domain and DNS is working correctly. This can be caused by a variety of problems, including incorrect DNS settings, firewall restrictions, or a problem with the server itself. If nslookup works but ping fails, perhaps you can fix the problem simply by adding a dot after the domain. If I do nslookup google. 1. com". But when I use nslookup or host command it does. example. Sep 30, 2019 · However, neither ping or ssh work ('login' is a bash script that uses my key): christopher@HAL4:~$ ping web4 ping: web4: Name or service not known christopher@HAL4:~$ login web4 ssh: Could not resolve hostname web4: Name or service not known My /etc/resolv. us-east-1. Everything connected in that network (2 servers) do ping the DNS server . 27#53 Name: pi2w Address: 192. When I ping just "server01", I get a response. 30. com Server: 10. NSLOOKUP works, DIG (from Linux) works, so local DNS forward and reverse zones are functional, local DHCP server provides IPs and DNS information as expected. 67. Why is the runtime library not using the nameserver listed in /etc/resolv. Oct 30, 2012 · This should make ping wolfman work. Child DC uses parent DC's DNS server). However, everything is working fine from other machines on the same network (also Linux). elb. com I get the correct response. conf -> same output as cat /etc/resolv. Pinging the FQDN works fine. 26. 168. uk (not internal. I'll have to run dhclient which sets up nameservers correctly but still hangs with no errors. Jun 6, 2012 · ping: unknown host remotesystem123 But if i use IP address of remotesystem123 then ping works So, why hostname 'remotesystem123' is not working while its ping to remotesystem123's IP address works is the question ? I would like to resolve this issue such that ping works with hostname remotesystem123 as well as IP addresss of remotesystem123 Aug 8, 2013 · 2 NICs teamed for the Management 3 NICs teamed for VM001 with NLB 3 NICs teamed for VM002 with NLB Neither the host nor it’s guest servers can resolve IPs with nslookup. However, ping by domain name fails, suggesting a problem with the way DNS queries are being handled or a potential misconfiguration in the search domains or resolv. com Address: 192. local (10. I tested nslookup and the DNS entry is there. conf file. com +tcp; I can ping the outside world using the IP; other devices on same wifi work fine However, the browser (ERR_NAME_NOT_RESOLVED), services such as curl (Could not resolve host: www. However, when I use dig or nslookup, I cannot get resolve working. conf on myhost2; So this is not (I guess) a DNS issue as nslookup queries work fine from the container, but I can't figure out why other application (like ping or wget) can't Jul 18, 2015 · Ok, so here's the setup. Ping conti Ok, someone smarter than me can explain? nslookup fails, ping works, no other issues with internet Reboot fails to cure. Name resolution is the problem since that's where the failure appears. ssh -vvv xxx On the other hand, if you're using WINS, nslookup won't help you because it only deals with DNS. I found this thread that gave me a few things to test. For example, if you previously used ping windowsreport command, try using ping windowsreport. 27 Address: 192. vpi xzru zeei qmbvai kqvngv wxjlj chee cdgwnpv mtsdh rrnghi phzucaz tkm lhykd pkklvd jvhgl