Question

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    Topic
  • #2198571

    strange clients in windows DHCP

    Locked

    by asoko ·

    Hello,

    I’ve launched duplicate (second) Windows Server 2003 R2 with domain controller, DNS, DHCP and WSUS functions and found out (after some time), that on the network appeared 2 client computers, which I can ping (though response times vary around 30ms). After little investigation i realized that those 2 clients aren’t real. They reside on my Windows servers (one for each). They obtain IP addresses from DHCP servers — client residing on server ONE obtained address from server TWO; and the client residing on server TWO obtained address from server ONE. It looks, that on both servers some services (virtual hosts??) are running, but they are using and responding to the IP addresses different from IP addresses of their servers. Maybe it’s normal, but it looks very strange, at least to me… Any ideas what can it be? Is it normal? Thanks.

All Answers

  • Author
    Replies
    • #3021164

      Clarifications

      by asoko ·

      In reply to strange clients in windows DHCP

      Clarifications

    • #3021143

      Why have two DHCP servers here?

      by the ‘g-man.’ ·

      In reply to strange clients in windows DHCP

      Check for extra plugged in (non static addressed) NIC’s on your servers.

      • #3021138

        Re:

        by asoko ·

        In reply to Why have two DHCP servers here?

        Well, second DHCP server for redundancy.
        Both servers have 2 NICs, but only one of them is plugged-in.
        While experimenting I removed DNS, DHCP and domain controller functions from the second server, but that virtual host on the first server is still pingable… Its name in DHCP is somethig like this: MACsuffix.domain.com
        Server is IBM xSeries 3650 and NICs are Broadcom NetXtreme II
        What can it be?

      • #3021135

        Oops…

        by asoko ·

        In reply to Why have two DHCP servers here?

        Ooops… that pingable thing resides on setver TWO, and it is pingable even when that server is turned off :D:D:D:D
        Is it ralatad with NIC extra functionality???

        • #3021104

          You are sure it is not your switches?

          by the ‘g-man.’ ·

          In reply to Oops…

          ???

        • #2838523

          Yes I am

          by asoko ·

          In reply to You are sure it is not your switches?

          Yes I’m sure. Switches have different IP addresses, and this pingable thing stops responding when I pull out the cable.

        • #2838507

          It isn’t NIC…

          by asoko ·

          In reply to You are sure it is not your switches?

          It wasn’t NIC. When turned off one server, that strange pingable thing moved to another, and was respondig from different NIC. I checked ports on my switches — ports connected directly to severs have 2 MAC adresses assigned to them. One of them is real, and the second – fake MAC address of that virtual pingable host.

        • #2838499

          RE:

          by jon ·

          In reply to It isn’t NIC…

          Can you please run the following two commands and post the results here. What these will do is provide information on all network connections and listening ports with PID, the second command will provide the same information that task manager will except by default task manager does not provide PID unless you add it to the view. With this information we should see what ports are open on your secondary address and the processes associated with it. Please let us know the primary address so we can know which IP address you want removed.

          netstat -ano >C:\findguy.txt
          tasklist /svc >>C:\findguy.txt

        • #2837757

          results

          by asoko ·

          In reply to RE:

          Hi,
          Thanks for reply. I’ve run those programs on both servers. At this time, that “thing” resides on the 2nd server (192.168.1.2), responses are coming from IP 192.168.1.11
          I also noticed that on 1st server (192.168.1.1) there are probably some problems with the dns.

          Here is an output from the 2nd server:

          Active Connections

          Proto Local Address Foreign Address State PID
          TCP 0.0.0.0:42 0.0.0.0:0 LISTENING 2192
          TCP 0.0.0.0:53 0.0.0.0:0 LISTENING 1400
          TCP 0.0.0.0:80 0.0.0.0:0 LISTENING 4
          TCP 0.0.0.0:88 0.0.0.0:0 LISTENING 412
          TCP 0.0.0.0:135 0.0.0.0:0 LISTENING 736
          TCP 0.0.0.0:389 0.0.0.0:0 LISTENING 412
          TCP 0.0.0.0:445 0.0.0.0:0 LISTENING 4
          TCP 0.0.0.0:464 0.0.0.0:0 LISTENING 412
          TCP 0.0.0.0:593 0.0.0.0:0 LISTENING 736
          TCP 0.0.0.0:636 0.0.0.0:0 LISTENING 412
          TCP 0.0.0.0:1026 0.0.0.0:0 LISTENING 412
          TCP 0.0.0.0:1027 0.0.0.0:0 LISTENING 412
          TCP 0.0.0.0:1044 0.0.0.0:0 LISTENING 1860
          TCP 0.0.0.0:1062 0.0.0.0:0 LISTENING 2192
          TCP 0.0.0.0:1070 0.0.0.0:0 LISTENING 2360
          TCP 0.0.0.0:1097 0.0.0.0:0 LISTENING 1400
          TCP 0.0.0.0:3389 0.0.0.0:0 LISTENING 3452
          TCP 0.0.0.0:8080 0.0.0.0:0 LISTENING 1640
          TCP 0.0.0.0:34571 0.0.0.0:0 LISTENING 2008
          TCP 0.0.0.0:34572 0.0.0.0:0 LISTENING 2008
          TCP 127.0.0.1:389 127.0.0.1:1033 ESTABLISHED 412
          TCP 127.0.0.1:389 127.0.0.1:1034 ESTABLISHED 412
          TCP 127.0.0.1:389 127.0.0.1:1035 ESTABLISHED 412
          TCP 127.0.0.1:389 127.0.0.1:2434 ESTABLISHED 412
          TCP 127.0.0.1:1033 127.0.0.1:389 ESTABLISHED 1584
          TCP 127.0.0.1:1034 127.0.0.1:389 ESTABLISHED 1584
          TCP 127.0.0.1:1035 127.0.0.1:389 ESTABLISHED 1584
          TCP 127.0.0.1:1041 127.0.0.1:1042 ESTABLISHED 1640
          TCP 127.0.0.1:1042 127.0.0.1:1041 ESTABLISHED 1640
          TCP 127.0.0.1:1102 0.0.0.0:0 LISTENING 3844
          TCP 127.0.0.1:2434 127.0.0.1:389 ESTABLISHED 1400
          TCP 127.0.0.1:30523 0.0.0.0:0 LISTENING 1612
          TCP 192.168.1.2:135 192.168.1.41:1160 ESTABLISHED 736
          TCP 192.168.1.2:139 0.0.0.0:0 LISTENING 4
          TCP 192.168.1.2:389 192.168.1.2:2432 ESTABLISHED 412
          TCP 192.168.1.2:1026 192.168.1.1:2222 ESTABLISHED 412
          TCP 192.168.1.2:1026 192.168.1.1:2775 ESTABLISHED 412
          TCP 192.168.1.2:1026 192.168.1.1:2782 ESTABLISHED 412
          TCP 192.168.1.2:1026 192.168.1.2:1050 ESTABLISHED 412
          TCP 192.168.1.2:1050 192.168.1.2:1026 ESTABLISHED 1860
          TCP 192.168.1.2:1063 192.168.1.1:389 CLOSE_WAIT 2360
          TCP 192.168.1.2:2432 192.168.1.2:389 ESTABLISHED 1860
          TCP 192.168.1.2:3051 192.168.1.2:389 CLOSE_WAIT 2360
          TCP 192.168.1.2:3167 192.168.1.1:1026 ESTABLISHED 412
          TCP 192.168.1.2:3210 192.168.1.1:1026 TIME_WAIT 0
          TCP 192.168.1.2:3211 192.168.1.1:1026 ESTABLISHED 412
          TCP 192.168.1.2:3389 192.168.1.13:1120 ESTABLISHED 3452
          UDP 0.0.0.0:42 *:* 2192
          UDP 0.0.0.0:445 *:* 4
          UDP 0.0.0.0:500 *:* 412
          UDP 0.0.0.0:1038 *:* 1400
          UDP 0.0.0.0:4500 *:* 412
          UDP 0.0.0.0:15000 *:* 1612
          UDP 127.0.0.1:53 *:* 1400
          UDP 127.0.0.1:123 *:* 836
          UDP 127.0.0.1:1028 *:* 412
          UDP 127.0.0.1:1032 *:* 1584
          UDP 127.0.0.1:1036 *:* 1400
          UDP 127.0.0.1:1045 *:* 1860
          UDP 127.0.0.1:1054 *:* 2360
          UDP 127.0.0.1:1061 *:* 2192
          UDP 127.0.0.1:1078 *:* 1400
          UDP 127.0.0.1:1092 *:* 352
          UDP 127.0.0.1:1111 *:* 1368
          UDP 127.0.0.1:1154 *:* 1176
          UDP 127.0.0.1:3096 *:* 3596
          UDP 127.0.0.1:3122 *:* 3280
          UDP 192.168.1.2:53 *:* 1400
          UDP 192.168.1.2:67 *:* 2360
          UDP 192.168.1.2:68 *:* 2360
          UDP 192.168.1.2:88 *:* 412
          UDP 192.168.1.2:123 *:* 836
          UDP 192.168.1.2:137 *:* 4
          UDP 192.168.1.2:138 *:* 4
          UDP 192.168.1.2:389 *:* 412
          UDP 192.168.1.2:464 *:* 412
          UDP 192.168.1.2:2535 *:* 2360

          Image Name PID Services
          ========================= ======== ============================================
          System Idle Process 0 N/A
          System 4 N/A
          smss.exe 276 N/A
          csrss.exe 324 N/A
          winlogon.exe 352 N/A
          services.exe 400 Eventlog, PlugPlay
          lsass.exe 412 HTTPFilter, kdc, Netlogon, NtLmSsp,
          PolicyAgent, ProtectedStorage, SamSs
          svchost.exe 592 DcomLaunch
          svchost.exe 736 RpcSs
          svchost.exe 800 Dhcp, Dnscache
          svchost.exe 836 LmHosts, W32Time
          svchost.exe 852 AeLookupSvc, AudioSrv, BITS, Browser,
          CryptSvc, dmserver, EventSystem, helpsvc,
          HidServ, lanmanserver, lanmanworkstation,
          Netman, Nla, RasMan, Schedule, seclogon,
          SENS, SharedAccess, ShellHWDetection,
          winmgmt, wuauserv, WZCSVC
          spoolsv.exe 1176 Spooler
          msdtc.exe 1200 MSDTC
          aqagent.exe 1268 aqagent
          avp.exe 1316 AVP
          cisvc.exe 1344 CiSvc
          dfssvc.exe 1368 Dfs
          dns.exe 1400 DNS
          svchost.exe 1480 ERSvc
          inetinfo.exe 1564 IISADMIN
          ismserv.exe 1584 IsmServ
          klnagent.exe 1612 klnagent
          miniwinagent.exe 1640 miniwinagent
          sqlservr.exe 1744 MSSQL$MICROSOFT##SSEE
          ntfrs.exe 1860 NtFrs
          svchost.exe 1968 RemoteRegistry
          RaidServ.exe 2008 ServeRAIDManagerAgent
          sqlwriter.exe 2024 SQLWriter
          avp.exe 2052 N/A
          wins.exe 2192 WINS
          wsusservice.exe 2252 WsusService
          tcpsvcs.exe 2360 DHCPServer
          svchost.exe 2400 W3SVC
          svchost.exe 3452 TermService
          svchost.exe 3480 TapiSrv
          alg.exe 3844 ALG
          w3wp.exe 4072 N/A
          w3wp.exe 300 N/A
          wmiprvse.exe 3400 N/A
          cidaemon.exe 1656 N/A
          cidaemon.exe 3304 N/A
          cidaemon.exe 3816 N/A
          logon.scr 4064 N/A
          csrss.exe 3288 N/A
          winlogon.exe 3596 N/A
          rdpclip.exe 644 N/A
          explorer.exe 3996 N/A
          avp.exe 1440 N/A
          ctfmon.exe 1376 N/A
          oobechk.exe 1172 N/A
          mshta.exe 2544 N/A
          wuauclt.exe 2956 N/A
          cmd.exe 748 N/A
          mmc.exe 3280 N/A
          tasklist.exe 3764 N/A
          wmiprvse.exe 3216 N/A

          /******************************************/
          /******************************************/
          /******************************************/

          And here is result from the 1st server:

          Active Connections

          Proto Local Address Foreign Address State PID
          TCP 0.0.0.0:21 0.0.0.0:0 LISTENING 1852
          TCP 0.0.0.0:42 0.0.0.0:0 LISTENING 2732
          TCP 0.0.0.0:53 0.0.0.0:0 LISTENING 1588
          TCP 0.0.0.0:80 0.0.0.0:0 LISTENING 4
          TCP 0.0.0.0:88 0.0.0.0:0 LISTENING 424
          TCP 0.0.0.0:135 0.0.0.0:0 LISTENING 752
          TCP 0.0.0.0:389 0.0.0.0:0 LISTENING 424
          TCP 0.0.0.0:427 0.0.0.0:0 LISTENING 1820
          TCP 0.0.0.0:445 0.0.0.0:0 LISTENING 4
          TCP 0.0.0.0:464 0.0.0.0:0 LISTENING 424
          TCP 0.0.0.0:593 0.0.0.0:0 LISTENING 752
          TCP 0.0.0.0:636 0.0.0.0:0 LISTENING 424
          TCP 0.0.0.0:1026 0.0.0.0:0 LISTENING 424
          TCP 0.0.0.0:1027 0.0.0.0:0 LISTENING 424
          TCP 0.0.0.0:1067 0.0.0.0:0 LISTENING 2152
          TCP 0.0.0.0:1068 0.0.0.0:0 LISTENING 1852
          TCP 0.0.0.0:1084 0.0.0.0:0 LISTENING 1588
          TCP 0.0.0.0:1087 0.0.0.0:0 LISTENING 2732
          TCP 0.0.0.0:1099 0.0.0.0:0 LISTENING 328
          TCP 0.0.0.0:1110 0.0.0.0:0 LISTENING 2932
          TCP 0.0.0.0:1149 0.0.0.0:0 LISTENING 328
          TCP 0.0.0.0:1433 0.0.0.0:0 LISTENING 2092
          TCP 0.0.0.0:2161 0.0.0.0:0 LISTENING 1344
          TCP 0.0.0.0:3052 0.0.0.0:0 LISTENING 1344
          TCP 0.0.0.0:3268 0.0.0.0:0 LISTENING 424
          TCP 0.0.0.0:3269 0.0.0.0:0 LISTENING 424
          TCP 0.0.0.0:3389 0.0.0.0:0 LISTENING 2088
          TCP 0.0.0.0:5988 0.0.0.0:0 LISTENING 2848
          TCP 0.0.0.0:5989 0.0.0.0:0 LISTENING 2848
          TCP 0.0.0.0:6988 0.0.0.0:0 LISTENING 1416
          TCP 0.0.0.0:9510 0.0.0.0:0 LISTENING 328
          TCP 0.0.0.0:9514 0.0.0.0:0 LISTENING 328
          TCP 0.0.0.0:9515 0.0.0.0:0 LISTENING 1808
          TCP 0.0.0.0:13000 0.0.0.0:0 LISTENING 1500
          TCP 0.0.0.0:14000 0.0.0.0:0 LISTENING 1500
          TCP 0.0.0.0:14248 0.0.0.0:0 LISTENING 328
          TCP 127.0.0.1:389 127.0.0.1:1053 ESTABLISHED 424
          TCP 127.0.0.1:389 127.0.0.1:1056 ESTABLISHED 424
          TCP 127.0.0.1:389 127.0.0.1:1057 ESTABLISHED 424
          TCP 127.0.0.1:389 127.0.0.1:1081 ESTABLISHED 424
          TCP 127.0.0.1:1044 127.0.0.1:1045 ESTABLISHED 1416
          TCP 127.0.0.1:1045 127.0.0.1:1044 ESTABLISHED 1416
          TCP 127.0.0.1:1053 127.0.0.1:389 ESTABLISHED 1880
          TCP 127.0.0.1:1056 127.0.0.1:389 ESTABLISHED 1880
          TCP 127.0.0.1:1057 127.0.0.1:389 ESTABLISHED 1880
          TCP 127.0.0.1:1081 127.0.0.1:389 ESTABLISHED 1588
          TCP 127.0.0.1:1119 0.0.0.0:0 LISTENING 3928
          TCP 127.0.0.1:1187 127.0.0.1:9515 ESTABLISHED 328
          TCP 127.0.0.1:9515 127.0.0.1:1187 ESTABLISHED 1808
          TCP 127.0.0.1:30523 0.0.0.0:0 LISTENING 1912
          TCP 192.168.1.1:135 192.168.1.1:1206 ESTABLISHED 752
          TCP 192.168.1.1:139 0.0.0.0:0 LISTENING 4
          TCP 192.168.1.1:139 192.168.1.13:2899 ESTABLISHED 4
          TCP 192.168.1.1:389 192.168.1.1:1070 ESTABLISHED 424
          TCP 192.168.1.1:389 192.168.1.1:1077 ESTABLISHED 424
          TCP 192.168.1.1:389 192.168.1.1:1111 ESTABLISHED 424
          TCP 192.168.1.1:389 192.168.1.1:1254 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1255 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1270 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1271 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1272 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1273 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1274 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1275 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1276 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1277 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1278 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1279 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1280 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1281 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1282 TIME_WAIT 0
          TCP 192.168.1.1:389 192.168.1.1:1283 TIME_WAIT 0
          TCP 192.168.1.1:445 192.168.1.9:2400 ESTABLISHED 4
          TCP 192.168.1.1:445 192.168.1.19:2447 ESTABLISHED 4
          TCP 192.168.1.1:1026 192.168.1.1:1073 ESTABLISHED 424
          TCP 192.168.1.1:1026 192.168.1.1:1207 ESTABLISHED 424
          TCP 192.168.1.1:1026 192.168.1.2:1221 ESTABLISHED 424
          TCP 192.168.1.1:1037 192.168.1.2:1026 TIME_WAIT 0
          TCP 192.168.1.1:1042 192.168.1.2:1026 TIME_WAIT 0
          TCP 192.168.1.1:1046 192.168.1.1:135 TIME_WAIT 0
          TCP 192.168.1.1:1047 192.168.1.1:1026 TIME_WAIT 0
          TCP 192.168.1.1:1060 192.168.1.1:1026 TIME_WAIT 0
          TCP 192.168.1.1:1067 192.168.1.2:1213 ESTABLISHED 2152
          TCP 192.168.1.1:1067 192.168.1.2:1214 ESTABLISHED 2152
          TCP 192.168.1.1:1070 192.168.1.1:389 ESTABLISHED 2152
          TCP 192.168.1.1:1072 192.168.1.1:135 TIME_WAIT 0
          TCP 192.168.1.1:1073 192.168.1.1:1026 ESTABLISHED 2152
          TCP 192.168.1.1:1077 192.168.1.1:389 ESTABLISHED 2932
          TCP 192.168.1.1:1090 192.168.1.2:135 TIME_WAIT 0
          TCP 192.168.1.1:1092 192.168.1.2:135 TIME_WAIT 0
          TCP 192.168.1.1:1093 192.168.1.2:1044 TIME_WAIT 0
          TCP 192.168.1.1:1095 192.168.1.2:1044 TIME_WAIT 0
          TCP 192.168.1.1:1111 192.168.1.1:389 ESTABLISHED 2932
          TCP 192.168.1.1:1135 192.168.1.1:1087 TIME_WAIT 0
          TCP 192.168.1.1:1206 192.168.1.1:135 ESTABLISHED 1216
          TCP 192.168.1.1:1207 192.168.1.1:1026 ESTABLISHED 1216
          TCP 192.168.1.1:1220 192.168.1.19:139 ESTABLISHED 4
          TCP 192.168.1.1:1223 192.168.1.1:135 TIME_WAIT 0
          TCP 192.168.1.1:1224 192.168.1.1:1026 TIME_WAIT 0
          TCP 192.168.1.1:1233 192.168.1.25:139 TIME_WAIT 0
          TCP 192.168.1.1:1235 192.168.1.44:139 TIME_WAIT 0
          TCP 192.168.1.1:1237 192.168.1.28:139 TIME_WAIT 0
          TCP 192.168.1.1:1239 192.168.1.36:139 TIME_WAIT 0
          TCP 192.168.1.1:1241 192.168.1.13:139 TIME_WAIT 0
          TCP 192.168.1.1:1244 192.168.1.1:445 TIME_WAIT 0
          TCP 192.168.1.1:1251 192.168.1.1:135 TIME_WAIT 0
          TCP 192.168.1.1:1252 192.168.1.1:1026 TIME_WAIT 0
          TCP 192.168.1.1:1254 192.168.1.1:389 TIME_WAIT 0
          TCP 192.168.1.1:1255 192.168.1.1:389 TIME_WAIT 0
          TCP 192.168.1.1:1256 192.168.1.2:445 TIME_WAIT 0
          TCP 192.168.1.1:1259 192.168.1.9:139 TIME_WAIT 0
          TCP 192.168.1.1:1260 192.168.1.1:135 TIME_WAIT 0
          TCP 192.168.1.1:1261 192.168.1.1:1026 TIME_WAIT 0
          TCP 192.168.1.1:1267 192.168.1.2:1026 ESTABLISHED 424
          TCP 192.168.1.1:1276 192.168.1.1:389 TIME_WAIT 0
          TCP 192.168.1.1:1285 192.168.1.50:139 TIME_WAIT 0
          TCP 192.168.1.1:1287 192.168.1.45:139 TIME_WAIT 0
          TCP 192.168.1.1:1296 192.168.1.35:445 SYN_SENT 4
          TCP 192.168.1.1:1298 192.168.1.41:445 ESTABLISHED 4
          TCP 192.168.1.1:1301 192.168.1.42:139 SYN_SENT 4
          TCP 192.168.1.1:3389 192.168.1.13:2896 ESTABLISHED 2088
          TCP 192.168.1.1:13000 192.168.1.26:3039 TIME_WAIT 0
          TCP 192.168.1.1:13000 192.168.1.28:1515 TIME_WAIT 0
          UDP 0.0.0.0:42 *:* 2732
          UDP 0.0.0.0:427 *:* 1820
          UDP 0.0.0.0:445 *:* 4
          UDP 0.0.0.0:500 *:* 424
          UDP 0.0.0.0:1071 *:* 1344
          UDP 0.0.0.0:1129 *:* 1216
          UDP 0.0.0.0:1136 *:* 328
          UDP 0.0.0.0:1138 *:* 328
          UDP 0.0.0.0:1142 *:* 328
          UDP 0.0.0.0:1144 *:* 328
          UDP 0.0.0.0:1434 *:* 2092
          UDP 0.0.0.0:1645 *:* 868
          UDP 0.0.0.0:1646 *:* 868
          UDP 0.0.0.0:1812 *:* 868
          UDP 0.0.0.0:1813 *:* 868
          UDP 0.0.0.0:2161 *:* 1344
          UDP 0.0.0.0:3456 *:* 1852
          UDP 0.0.0.0:4500 *:* 424
          UDP 0.0.0.0:7846 *:* 1344
          UDP 0.0.0.0:13000 *:* 1500
          UDP 0.0.0.0:49161 *:* 1588
          UDP 0.0.0.0:49183 *:* 1588
          UDP 0.0.0.0:49195 *:* 1588
          UDP 0.0.0.0:49204 *:* 1588
          UDP 0.0.0.0:49218 *:* 1588
          UDP 0.0.0.0:49219 *:* 1588
          UDP 0.0.0.0:49226 *:* 1588
          UDP 0.0.0.0:49229 *:* 1588
          UDP 0.0.0.0:49230 *:* 1588
          UDP 0.0.0.0:49233 *:* 1588
          UDP 0.0.0.0:49238 *:* 1588
          UDP 0.0.0.0:49244 *:* 1588
          UDP 0.0.0.0:49246 *:* 1588
          UDP 0.0.0.0:49247 *:* 1588
          UDP 0.0.0.0:49251 *:* 1588
          UDP 0.0.0.0:49252 *:* 1588
          UDP 0.0.0.0:49253 *:* 1588
          UDP 0.0.0.0:49255 *:* 1588
          UDP 0.0.0.0:49257 *:* 1588
          UDP 0.0.0.0:49261 *:* 1588
          UDP 0.0.0.0:49262 *:* 1588
          UDP 0.0.0.0:49269 *:* 1588
          UDP 0.0.0.0:49286 *:* 1588
          UDP 0.0.0.0:49293 *:* 1588
          UDP 0.0.0.0:49297 *:* 1588
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        • #2836676

          Re:

          by jon ·

          In reply to results

          Unless I’m not seeing something, there is nothing listed for 192.168.1.11 listening. This method does not look like it’s going to help. You might want to check all the currently running services and make sure you know what each is. Also, what type of server is this and have you setup a virtual network adapter?

        • #2838469

          going to be very harsh here

          by cg it ·

          In reply to Oops…

          first is if you put 2 DHCP servers on the same subnet, your going to have problems. You should actually get a popup box indicating there are 2 on the subnet and you need to resolve that problem. Since you purposely put 2 on the network, and do not indicate that your using superscopes, that shows you don’t know what your doing.

          Next is your confusion about DHCP clients obtaining address from DHCP. Single physical network cards do not get 2 addresses from a DHCP server. They can only get 1 address for a subnet. If your running virtual machines on the network, which you do not indicate you are, those machines might be getting addresses if you use virtual network adapter software. But then if you setup and configured the network including documenting the configuration, you should know rather than question addresses that are leased to clients.

          So all the information you give us indicates you don’t know what your doing.

          Last, since you have DNS and DHCP running on the network, you should be able to find out the name of the computer that is obtaining the address your questioning which you then can compare to your network documentation to determine if the clients are obtaining addresses the way in which you want them to.

    • #2836417

      127.0.0.1

      by the ‘g-man.’ ·

      In reply to strange clients in windows DHCP

      surely not, no!

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