Issues with internet connectivity only for linux systems on a subnet
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@Gertjan i am using unbound and i do not have pfBlockerng
Btw : "Connection refused" tells me that unbound did get the DNS request, but unbound was informed to 'refuse' it.
Nothing special unbound ACLs ?nothing on ACL
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Check the ARP table.
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@stephenw10 there is an entry for the system but no internet access. still i am able to ping the pfsense and other systems on the subnet
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@stephenw10 on the otherside, the firewall cannot ping the same system
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No check the ARP table in Kali for the 10.10.10.1 address. It seems at least possible something else is using it and sending the wrong MAC.
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@stephenw10 top is before and bottom is after the refresh.
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Aha, well there you go. Only one of those MACs is correct. Where is that other MAC coming from?
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@stephenw10 thank you so much! i found the culprit!
on my proxmox i had setup the switch interface to be on the 10.10.10.1/24 and so I had two interfaces with the same IP... you are a god thank you!
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Ah, that would do it! Interesting that it only seemed to affect Linux hosts though. I suspect eventually Windows would also have hit it.
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@stephenw10 who knows... thanks again! I was going crazy for two weeks now until I decided to reach out to this forum! i was asking coworkers and people on mastodon but all i needed to do in the end was arp-scan and see that there was a conflict with two macs on the same IP. Saddly I cannot upvote you because of my low reputation.
For future readers please give stephenw10 an upvote for me <3
