This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

A phone is receiving ip address of the firewall when it connects to the network

Good day

We have an XG 35 ON VERSION 20.0.1

There is a phone that is connecting to the network.. and when it connects the network it is getting 192.168.10.1 which is the ip addresss of the firewall ..

Our DHCP is the firewall , and the DHCP pool is starting from 192.168.10.16 - 192.168.10.250

There are also some machines that are getting ip addresses below 192.168.10.16 ..

This thread was automatically locked due to age.

Top Replies

Vishal_R 4 months ago in reply to Anesu Dangarembwa +2 verified

Hi Anesu Dangarembwa Can you please confirm whether there are multiple DHCP server exits or not in the network? As you have also mentioned some machines are getting an IP address below 192.168.10.16 and…

Parents

0 rfcat_vk 4 months ago

Hi,

sounds like some fixed addresses or not renewing from the isp wifi connection when away from your network.

ian

XG115W - v20.0.2 MR-2 - Home

XG on VM 8 - v21 GA

If a post solves your question please use the 'Verify Answer' button.
Cancel
Vote Up 0 Vote Down

Cancel
0 Anesu Dangarembwa 4 months ago in reply to rfcat_vk

This is the phone

Anesu Dangarembwa | Sophos Engineer | Covenant Technologies
Cancel
Vote Up 0 Vote Down

Cancel
+1 Vishal_R 4 months ago in reply to Anesu Dangarembwa

Hi Anesu Dangarembwa Can you please confirm whether there are multiple DHCP server exits or not in the network? As you have also mentioned some machines are getting an IP address below 192.168.10.16 and that is not the DHCP scope set in the Sophos DHCP Server, so from those machines pick 1-2 machines and do the DHCP renewal, and capture the Wireshark on the relevant interface during this DHCP renewal process, once PCAP is captured check the MAC address to see if it is of which vendor and if any such vendor device exists in the network then confirm DHCP is enabled or not in that device!

Regards,

Vishal Ranpariya
Technical Account Manager | Sophos Technical Support
Sophos Support Videos | Knowledge Base | @SophosSupport | Sign up for SMS Alerts |
If a post solves your question use the 'Verify Answer' link.
Cancel
Vote Up +2 Vote Down

Cancel

Reply

+1 Vishal_R 4 months ago in reply to Anesu Dangarembwa

Hi Anesu Dangarembwa Can you please confirm whether there are multiple DHCP server exits or not in the network? As you have also mentioned some machines are getting an IP address below 192.168.10.16 and that is not the DHCP scope set in the Sophos DHCP Server, so from those machines pick 1-2 machines and do the DHCP renewal, and capture the Wireshark on the relevant interface during this DHCP renewal process, once PCAP is captured check the MAC address to see if it is of which vendor and if any such vendor device exists in the network then confirm DHCP is enabled or not in that device!

Regards,

Vishal Ranpariya
Technical Account Manager | Sophos Technical Support
Sophos Support Videos | Knowledge Base | @SophosSupport | Sign up for SMS Alerts |
If a post solves your question use the 'Verify Answer' link.
Cancel
Vote Up +2 Vote Down

Cancel

Children

0 Anesu Dangarembwa 3 months ago in reply to Vishal_R

Hi Vishal we found out that the DHCP service in the active directory was also running

Anesu Dangarembwa | Sophos Engineer | Covenant Technologies
Cancel
Vote Up 0 Vote Down

Cancel
0 Vishal_R 3 months ago in reply to Anesu Dangarembwa

Hi Anesu Dangarembwa Thank you for the latest update and I am glad you managed to fix the issue based on the last comment feedback and suggestions!

Regards,

Vishal Ranpariya
Technical Account Manager | Sophos Technical Support
Sophos Support Videos | Knowledge Base | @SophosSupport | Sign up for SMS Alerts |
If a post solves your question use the 'Verify Answer' link.
Cancel
Vote Up 0 Vote Down

Cancel