Remote extension fails to register 401 AUTH

GREETINGS:

I have an extension that registers when connected to my LAN, but not from the WAN side. I initiated a debug by IP. I get the following results with an authentication failure resulting in the registration attempt being torn down.

<— SIP read from 196.251.x.x:5060 —>
REGISTER sip:192.168.x.x SIP/2.0
Via: SIP/2.0/UDP 196.251.x.x5060;branch=z9hG4bK-596bb9a820.8520.85
From: jester111111 sip:xxx0370@192.168.x.x;tag=5c6ccfd244a955f5o0
To: jester111111 sip:xxx0370@192.168.x.x
Call-ID: b8a626dc-e31bd9d5@196.251.x.x.
CSeq: 39799 REGISTER
Max-Forwards: 70
Contact: jester111111 sip:xxx0370@196.251.x.x:5060;expires=3600
User-Agent: Linksys/PAP2T-3.1.15(LS)
Content-Length: 0
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Supported: x-sipura

<------------->
— (12 headers 0 lines) —x.x
Using latest REGISTER request as basis request
Sending to1 196.251x.x : 5060 (NAT)

<— Transmitting (NAT) to 196.251.x.x:5060 —>
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 196.251x.x:5060;branch=z9hG4bK-596bb9a8;received=196.251.x.x20.85
From: jester111111 sip:xxx0370@192.168.x.x;tag=5c6ccfd244a955f5o0
To: jester111111 sip:xxx0370@192.168.x.x
Call-ID: b8a626dc-e31bd9d5@196.251.x.x
CSeq: 39799 REGISTER
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Supported: replaces
Contact: sip:xxx0370@192.168.x.x
Content-Length: 0

<------------>

<— Transmitting (NAT) to 196.251.x.x:5060 —>
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 196.251.x.x:5060;branch=z9hG4bK-596bb9a8;received=196.251.x.x
From: jester111111 <sip:xxx0370@192.168.x.x;tag=5c6ccfd244a955f5o0
To: jester111111 sip:xxx0370@192.168.x.x;tag=as04be8d06
Call-ID: b8a626dc-e31bd9d5@196.251.x.x
CSeq: 39799 REGISTER
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Supported: replaces
WWW-Authenticate: Digest algorithm=MD5, realm=“asterisk”, nonce="5aeef1ca"
Content-Length:
x.x

<------------>
Scheduling destruction of SIP dialog 'b8a626dc-e31bd9d5@196.251.x.x’ in 32000 ms (Method: REGISTER)
pbx*CLI>
<— SIP read from 196.251.x.x:5060 —>
REGISTER sip:192.168.x.x SIP/2.0
Via: SIP/2.0/UDP 196.251.x.x:5060;branch=z9hG4bK-d63c890
From: jester111111 sip:xxx0370@192.168.x.x;tag=5c6ccfd244a955f5o0
To: jester111111 sip:xxx0370@192.168.x.x
Call-ID: b8a626dc-e31bd9d5@196.251.x.x
CSeq: 39800 REGISTER
Max-Forwards: 70
Authorization: Digest username=“xxx0370”,realm=“asterisk”,nonce=“5aeef1ca”,uri=“sip:192.168.x.x”,algorithm=MD5,response="73b55c76786deb9e7d56e5bc627f0b8e"
Contact: jester111111 sip:xxx0370@196.251.x.x:5060;expires=3600
User-Agent: Linksys/PAP2T-3.1.15(LS)
Content-Length: 0
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Supported: x-sipura

On my firewall I have opened ports 5060,5061 for sip and rtp ports 10000 to 20000, but none of these entries are being used because I do not see any hit counters are incrementing.

The remote device I am using is a linksys PAP2T ATA