Hello , All here is my configuration export from mikrotik router i have 1wan and 7LAN interfaces cloud core router i dont know what is wrong with my router when i connect all 8 ports browsing doesnt work but downoload is good . Please Help thank you

set [ find default-name=ether1 ] advertise=\
10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full,5000M-full \
name="ether1 WAN"
set [ find default-name=ether2 ] name="ether2 LAN1"
set [ find default-name=ether3 ] advertise="10M-half,10M-full,100M-half,100M-ful\
l,1000M-half,1000M-full,2500M-full,5000M-full,10000M-full" name=\
"ether3 LAN2"
set [ find default-name=ether4 ] name="ether4 LAN3"
set [ find default-name=ether5 ] name="ether5 LAN4"
set [ find default-name=ether6 ] name="ether6 LAN5"
set [ find default-name=ether7 ] comment="Downlink to Cisco Switch" name=\
"ether7 LAN6 "
set [ find default-name=ether8 ] comment="PC " name="ether8 LAN7 "
set [ find default-name=sfp-sfpplus1 ] disabled=yes
set [ find default-name=sfp1 ] disabled=yes
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
/ip pool
add name=dhcp_pool0 ranges=172.16.1.1-172.16.1.240
add name=dhcp_pool1 ranges=172.16.2.1-172.16.2.240
add name=dhcp_pool2 ranges=172.16.3.1-172.16.3.240
add name=dhcp_pool3 ranges=172.16.4.1-172.16.4.240
add name=dhcp_pool4 ranges=172.16.5.1-172.16.5.240
add name=dhcp_pool5 ranges=172.16.6.1-172.16.7.240
add name=dhcp_pool6 ranges=172.16.8.1-172.16.8.5
/ip dhcp-server
add address-pool=dhcp_pool0 disabled=no interface="ether2 LAN1" name=dhcp1
add address-pool=dhcp_pool1 disabled=no interface="ether3 LAN2" name=dhcp2
add address-pool=dhcp_pool2 disabled=no interface="ether4 LAN3" name=dhcp3
add address-pool=dhcp_pool3 disabled=no interface="ether5 LAN4" name=dhcp4
add address-pool=dhcp_pool4 disabled=no interface="ether6 LAN5" name=dhcp5
add address-pool=dhcp_pool5 disabled=no interface="ether7 LAN6 " name=dhcp6
add address-pool=dhcp_pool6 disabled=no interface="ether8 LAN7 " name=dhcp7
/queue simple
add disabled=yes max-limit=10M/10M name="LAN1 Bandwidth " target="ether2 LAN1"
add disabled=yes max-limit=10M/10M name="LAN 2 Bandwidth " target="ether3 LAN2"
add disabled=yes max-limit=10M/10M name="LAN3 Bandwidth" target="ether4 LAN3"
add disabled=yes max-limit=10M/10M name="LAN4 Bandwidth" target="ether5 LAN4"
add disabled=yes max-limit=10M/10M name="LAN5 Bandwidth" target="ether6 LAN5"
add disabled=yes max-limit=10M/10M name="LAN6 Bandwidth" target="ether7 LAN6 "
add disabled=yes max-limit=3M/5M name="LAN7 Bandwidth" target="ether8 LAN7 "
add disabled=yes max-limit=10M/10M name=queue1 target=172.16.8.4/32
/ip address
add address=192.168.1.10/24 interface="ether1 WAN" network=192.168.1.0
add address=172.16.1.254/24 interface="ether2 LAN1" network=172.16.1.0
add address=172.16.2.254/24 interface="ether3 LAN2" network=172.16.2.0
add address=172.16.3.254/24 interface="ether4 LAN3" network=172.16.3.0
add address=172.16.4.254/24 interface="ether5 LAN4" network=172.16.4.0
add address=172.16.5.254/24 interface="ether6 LAN5" network=172.16.5.0
add address=172.16.7.254/23 interface="ether7 LAN6 " network=172.16.6.0
add address=172.16.8.6/29 interface="ether8 LAN7 " network=172.16.8.0
/ip dhcp-server lease
add address=172.16.4.25 client-id=1:88:dc:96:47:1e:9e comment="Access Point" \
lease-time=52w1d mac-address=88:DC:96:47:1E:9E server=dhcp4
add address=172.16.1.3 client-id=1:88:dc:96:47:1e:9a comment="access point 2" \
mac-address=88:DC:96:47:1E:9A server=dhcp1
add address=172.16.3.130 client-id=1:88:dc:96:47:1e:ba comment="access point" \
mac-address=88:DC:96:47:1E:BA server=dhcp3
add address=172.16.2.193 client-id=1:88:dc:96:47:1e:9c comment="accesss point" \
mac-address=88:DC:96:47:1E:9C server=dhcp2
/ip dhcp-server network
add address=172.16.1.0/24 dns-server=172.16.1.254,8.8.8.8 gateway=172.16.1.254
add address=172.16.2.0/24 dns-server=172.16.2.254,8.8.8.8 gateway=172.16.2.254
add address=172.16.3.0/24 dns-server=172.16.3.254,8.8.8.8 gateway=172.16.3.254
add address=172.16.4.0/24 dns-server=172.16.4.254,8.8.8.8 gateway=172.16.4.254
add address=172.16.5.0/24 dns-server=172.16.5.254,8.8.8.8 gateway=172.16.5.254
add address=172.16.6.0/23 dns-server=172.16.7.254,8.8.8.8 gateway=172.16.7.254
add address=172.16.8.0/29 dns-server=172.16.8.6 gateway=172.16.8.6
/ip dns
set allow-remote-requests=yes servers=192.168.1.1
/ip firewall nat
add action=masquerade chain=srcnat
/ip route
add check-gateway=ping distance=1 gateway=192.168.1.1
/system clock

without seeing full config cannot see firewall rules..........

I don't have firewall rules at the moment do I have to enable firewall ?

This seems to me a DNS or NAT issue. Your NAT rule, although unconventional, should work. I would lean more to DNS. Is the CCR able to resolve DNS it’s self? If you change the DNS server from 192.168.1.1 to 8.8.8.8, does it browse better?

missing out-interface=

first test if the router itself can ping 8.8.8.8, then the router can resolve a dns name, before you move on to other things.