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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">I got some problems with DHCP requests.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">Expected scenario:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">Computer logs on wifi with host login and is assigned to vlan 200 (10.28.0.0/23)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">User logs into computer an reauthenticate on wifi and is assigned to vlan 201 (10.28.2.0/23)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">Windows 10 sends a DHCP request for the ip address on vlan 200.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">KEA sends a NAK, as the requested ip is not in scope.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">Windows sends DHCP discover and so forth.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">What we see is that KEA never sends the NAK, but sees the REQUEST packet as a bad packet, and then discards it.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">How can I get KEA to send a NAK?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">I’ve tried this with 1.3 and 1.5<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt">Log:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New"">2019-08-21 13:40:24.683 DEBUG [kea-dhcp4.packets/41217] DHCP4_PACKET_RECEIVED [hwtype=1 a0:51:0b:0c:24:93], cid=[01:a0:51:0b:0c:24:93], tid=0xef9810de: DHCPREQUEST (type
3) received from 10.28.2.2 to 192.168.30.10 on interface eth0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New"">2019-08-21 13:40:24.683 DEBUG [kea-dhcp4.packets/41217] DHCP4_QUERY_DATA [hwtype=1 a0:51:0b:0c:24:93], cid=[01:a0:51:0b:0c:24:93], tid=0xef9810de, packet details: local_address=192.168.30.10:67,
remote_address=10.28.2.2:67, msg_type=DHCPREQUEST (3), transid=0xef9810de,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New"">options:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New""> type=012, len=008: "PC622019" (string)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New""> type=050, len=004: 10.28.0.172 (ipv4-address)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New""> type=053, len=001: 3 (uint8)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New""> type=055, len=014: 1(uint8) 3(uint8) 6(uint8) 15(uint8) 31(uint8) 33(uint8) 43(uint8) 44(uint8) 46(uint8) 47(uint8) 119(uint8) 121(uint8) 249(uint8) 252(uint8)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New""> type=060, len=008: "MSFT 5.0" (string)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New""> type=061, len=007: 01:a0:51:0b:0c:24:93<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New""> type=81 (CLIENT_FQDN), flags: (N=0, E=0, O=0, S=0), domain-name='pc622019.itu.local' (partial)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Courier New"">2019-08-21 13:40:24.684 DEBUG [<b>kea-dhcp4.bad-packets</b>/41217] DHCP4_NO_LEASE_INIT_REBOOT [hwtype=1 a0:51:0b:0c:24:93], cid=[01:a0:51:0b:0c:24:93], tid=0xef9810de:
no lease for address 10.28.0.172 requested by INIT-REBOOT client<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB">-- <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB">Med venlig hilsen / With best regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB">Thomas Andersen<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB">Network Architect<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB">IT University of Copenhagen<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-GB">Rued Langgaards Vej 7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-GB">2300 København S<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-GB">Phone: +45 72185249<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB">____________________________________________________________________________<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-GB">**NEVER DISCLOSE YOUR PASSWORD OR SHOE SIZE - NOT EVEN TO YOUR DENTIST**<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
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