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I have a Ubuntu 16.04 server with Squid 3.5.22 installed. It acts as a gateway in a LAN. It is configured to intercept HTTP and HTTPS traffic (Transparent). So iptables redirects were used for ports 80 and 443. The server runs two scripts:
nat.sh to bridge the two network cards, allowing LAN computers access to the internet through the servers Internet interface card.
iptables.sh which defines the ip rules and port forwarding: http://pastebin.com/SqpbmYQQ
BEFORE RUNNING iptables.sh...
When I connect a LAN computer to it, everything works as expected. Complete Internet access with some HTTP and HTTPS domains blocked/redirected to another page. Skype for Business logs in successfully. AFTER RUNNING iptables.sh
Skype for Business disconnects, and fails to re-connect, normal skype works
just fine.
I revised: https://support.office.com/en-us/article/Create-DNS-records-at-eNomCentral-for-Office-365-a6626053-a9c8-445b-81ee-eeb6672fae77?ui=en-US&rs=en-US&ad=US#bkmk_verify And added all DNS configurations on enom. That got rid of the DNS error I was getting to another error saying service is temporarily unavailable. Any suggestions to why this is happening? Any solutions? Note: both router and Ubuntu's WAN interface use Google's 8.8.8.8 DNS Any help is really appreciated as I have been trying to fix this for days!
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