ipv6部分app打不开，微信QQ无法收文件和图片

ipv6做了aft转换成ipv4出去上网，

但是部分app打不开，微信QQ无法收文件和图片

请问是什么原因呢

mtu和tcp mss都改了

vlan 1

#

vlan 1001

object-group ip address 192.168.20.2

 0 network host address 192.168.20.1

#

object-group ip address waiwang

 0 network subnet 0.0.0.0 0.0.0.0

#

object-group ipv6 address 2012::192.168.20.2

 0 network host address 2012::C0A8:1402

#              

object-group ipv6 address 2013::

 0 network subnet 2013::/96

#

interface Vlan-interface1

 ip address 192.168.1.27 255.255.255.0

 tcp mss 1024

 ipv6 mtu 1400

 aft enable

 ipv6 address 2013::1/96

#

interface Vlan-interface1001

 ip address 10.10.2.2 255.255.255.0

#

interface GigabitEthernet1/0/17

 port link-mode route

 description 互联路由器

 ip address 192.168.20.2 255.255.255.0

 aft enable

interface GigabitEthernet1/0/15

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 1001

#

security-zone name Local

#

security-zone name Trust

 import interface Vlan-interface1

 import interface Vlan-interface1001

 import interface GigabitEthernet1/0/13 vlan 1

 import interface GigabitEthernet1/0/15 vlan 1 1001

#

security-zone name DMZ

#

security-zone name Untrust

 import interface GigabitEthernet1/0/17

#

 ip route-static 0.0.0.0 0 192.168.20.1

 ip route-static 10.10.1.0 24 10.10.2.1

acl advanced 3100

 rule 0 permit ip

#

acl ipv6 advanced 3100

 rule 0 permit ipv6 source 2013::/96

 rule 5 deny ipv6

#

aft address-group 0

 address 192.168.20.2 192.168.20.2

#              

 aft prefix-nat64 2012:: 96

 aft v6tov4 source acl ipv6 number 3100 address-group 0

#

security-policy ip

rule 3 name aftlocalout

  action pass

  source-zone local

  destination-zone untrust

  source-ip 192.168.20.2

  destination-ip waiwang

#

security-policy ipv6

 rule 0 name aftlocalin

  action pass

  source-zone trust

  destination-zone local

  source-ip 2013::

  destination-ip 2012::192.168.20.2