I am having what seems a very basic issue getting my WAN connection connected to Sophos Home Firewall version 20, I'm hoping someone can help?
I've found various posts regarding this over the years but am still unclear exactly why it's still an issue, and why it's not been resolved, so thought I'd post with as much info as possible to see what I've missed, as I'm sure there must be a fix?
This configuration works fine with pfsense and opnsense using Sky ISP, so I would expect this to work with Sophos (or my expectatations of Sophos are too high)
1. If I connect the wan interface to my TP-Link modem which is in bridge mode, it will not obtain am IP address from Sky's (ISP) DCHP (note again, this works fine with pfsense and opnsense)
2. If I put the dsl line into my Sky router and let it obtain an IP address, and then instantly move that line into my TP-Link modem attached to the WAN interface of Sophos, it uses the WAN IP and works perfectly for 24 hours, until Sky (ISP) sends a DHCP renewal request / the lease expires, which then fails and the WAN connection drops.
3. If I repeat step 2, I can obtain a new IP and Sophos will work again for another 24 hours.
From what I've read on this so far, it seems to be related to "DHCP Option 61" being required on the WAN interface to obtain the IP.
I've seen older posts suggesting to edit files in the var/chroot-xxx directory, which no longer exists and through all my attempts trying other hardware, I cannot get this to work with Sky ISP / VDSL2, but being one of the countries largest ISP's, I'm adamant on getting it to work.
Has anyone else faced with issue with SKY ISP UK?
Thanks in advance!
[edited by: Raphael Alganes at 5:23 AM (GMT -8) on 13 Feb 2024]