I have a relatively new installation of IPFire 2.25 (x86_64) - Core Update 153 and it is running fine (as far as I can tell)
I have changed nothing from standard other than adding Guardian & Intrusion Protection using Talos VRT rules
My Firewall logs are full of DROP_NEWNOTSYN messages (about 1 a minute)
MY Networking knowledge is rudimentary
This is the only information i I can find on what may be happening http://www.faqs.org/docs/iptables/newnotsyn.html.
I have only Red & Green zones
The Majority of messages come on green and the majority of those from a Bose Internet connected sound system. but others appear from other devices on green and on red from IP addresses apparently associated with social media companies.
I see that in the firewall options I can stop logging these messages
My questions are:
Should I be concerned about these messages?
or Should I just stop logging them so I can see any other messages more easily?
And is there a better resource I can use to read up on things like this without getting too bogged down in technicalities?
EDIT - I just found the WIKI concerning Firewall Options / Logging which explains these messages well wiki.ipfire.org - Firewall Options