I was using it as a URL that was set up by default. I don't know at what point it started not working, but I recognized it after the customer asked me, and I didn't change any settings until this point. there is some NAT rule due to something service related to voice. However, regardless of this, the DNS call response worked normally, so there was no problem in trying the Anyconnect SSLVPN connection through the URL. I also change local DNS from Private IP to 8.8.8.8 and tried DNS query. But It was still no working DNS reply.
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