Question about DHCPLOC and our servers

-

hello, studying 70-291 cert exam , started playing around dhcploc.  have attached screenshot of portion of recorded.  aware .153 dhcp server, not rogue.  didn't out in server because testing things @ time.  anyway, noticed lot of ack (ip)0.0.0.0 in our logs , curious going on causes them appear.  also, if simple request/offer/acknowledgement procedure, why have have same ip address being acknowledged repeatedly.  1.149 best example of this.  there issue should when see ip hitting server repeatedly?  aware of each of these users are, , confident don't have rogue programs running.  our servers not setup , desperately need cleaned up.  i'm hoping can learn through , maybe clean process.

later in same log, started getting nack 0.0.0.0 also.    if give me quick pointers, i'd appreciate it, of resources have found have not yet addressed these questions.  have told me should see/should expect, don't cover out of normal...  thank in advance.

hi,

thank post.

why have the same ip address being acknowledged repeatedly.
client (like 1.149) ack dhcp packets when both obtain new dhcp lease , renew dhcp lease, please read dhcp architecture article.
0.0.0.0 ip, if specify dhcp server ip when running dhcploc, not show 0.0.0.0 ip record.(that mean it's local host , no need care.)

is there issue should when see ip hitting server repeatedly?
the dhcploc tool detects unauthorized dhcp server. if want know dhcp packets details(mac address/application), please use network monitor tool  to analyze network packets. 

if there more inquiries on issue, please feel free let know.

regards

rick tan

technet community support



Windows Server  >  Network Infrastructure Servers



Comments

Post a Comment

Popular posts from this blog

WIMMount (HSM) causing cluster storage to go redirected (2012r2 DC)

-
looking options resolve error , prevent in future. thanks help. hardware: 2 node dell hv cluster running2012r2 dc 8 nic/ea in multiplex mode 4x hyper-v 4x hosts storage: 2x synology nas, accessed through iscsi hosts , cluster relevant logs: log name:      microsoft-windows-failoverclustering/diagnostic source:        microsoft-windows-failoverclustering date:          event id:      2050 task category: none level:         warning keywords:       user:          system computer:      l description: [dcm] filter wimmount found @ unsafe altitude 180700 log name:      system source:        microsoft-windows-failoverclustering date:         event id:      5125 task category: cluster shared volume level:         warning keywords:       user:          system computer: description: cluster shared volume 'volume1' ('cluster disk 1') has identified 1 or more active filter drivers on device stack interfere csv operatio
Read more

Failed to delete the test record dcdiag-test-record in zone test.com

-
ps c:\users\administrator.test> dcdiag /test:dns directory server diagnosis performing initial setup:    trying find home server...    home server = dc02    * identified ad forest.    done gathering initial info. doing initial required tests    testing server: default-first-site-name\dc02       starting test: connectivity          ......................... dc02 passed test connectivity doing primary tests    testing server: default-first-site-name\dc02       starting test: dns          dns tests running , not hung. please wait few minutes...          ......................... dc02 passed test dns    running partition tests on : forestdnszones    running partition tests on : domaindnszones    running partition tests on : schema    running partition tests on : configuration    running partition tests on : test    running enterprise tests on : test.com       starting test: dns          test results domain
Read more

Azure MFA with Azure AD and RDS

-
i have setup following lab in azure , need help. a server (domain controller) , remote desktop services. and server multi factor authentication server. i have setup following one http://www.rdsgurus.com/uncategorized/step-by-step-using-windows-server-2012-r2-rd-gateway-with-azure-multifactor-authentication/ and when im connecting got following error. the user "domain\username", on client computer "xxx.xxx.xxx.xxx", did not meet connection authorization policy requirements , therefore not authorized access rd gateway server. authentication method used was: "ntlm" , connection protocol used: "rpc-http". following error occurred: "23003". also on security log i've got following authentication details: connection request policy name: ts gateway authorization policy network policy name: - authentication provider: radius proxy authentication server: test.test.local authentication type: - eap t
Read more