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Static IP for Sophos Firewall

Oktawian Komornicki

Hello dear community!

I would like to clarify few dummy things.

During configuring my terminal station into firewall router (steps as per 'tutorial': https://www.youtube.com/watch?v=YGR9_kmPlig&t=451s) I've encountered issue as was unable to connect to 172.16.16.16:4444

Investigating topic I've discovered that my network service provider do not support static IP addresses as:

IP addresses for Netia's internet services are dynamically assigned. 
This means that even each disconnection will result in the assignment of a different (currently free) IP address from a specific address pool.


Entering the configuration manually is unnecessary and at the same time impossible,
because the address assigned from Netia has a shortened /32 mask (255.255.255.255), i.e. it is one host address, not a subnet.

From my newbie understanding when I turning off DHCP server I will need static IP address to access web and because I am unable to use one I cannot access 172.16.16.16:4444.

I can obtain static IP from my network service provider but before doing so I would like to somehow confirm that is the root cause.

Please share yours thoughts and confirm if obtaining static IP from NSP is a good step forward.



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  • 0

    Hi,

    you are confusing two issues.

    1/. The IP address you are quoting is for your internal network and uses aDHCP server to assign addresses to connecting devices.

    2/. The WAN interface can have either static or dynamic addressing. You will disable the DHCP function on your wan interfaces when you click assign static address. 

    3/. the servers on each interface are independent in the default setup.

    Ian

    XG115W - v20.0.3 MR-3 - Home

    XG on VM 8 - v21 GA

    If a post solves your question please use the 'Verify Answer' button.

  • 0 in reply to rfcat_vk

    Hi,
    Thanks for answer!

    So in big simplification those two matters it looks like below?

    WAN <-- dynamically assigned IP by NSP --> Router <--- DHCP which I am disabling ---> other devices

    So to access 172.16.16.16:4444 after disabling local DHCP should I also add IP address of my terminal station with sophos to DHCP Static IP configuration in LAN configuration on router? Please refer below

  • 0 in reply to Oktawian Komornicki

    Why are you disabling the XG internal DHCP server? 

    Ian

    XG115W - v20.0.3 MR-3 - Home

    XG on VM 8 - v21 GA

    If a post solves your question please use the 'Verify Answer' button.

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