Canon EOS 90D Advanced User's Manual page 486

Responding to Error Messages
22: No response from DNS server
What to check on the camera
On the camera, does the DNS server's IP address setting match the

server's actual address?
Set the IP address to [Manual setting]. Then, on the camera, set
g
the IP address that matches the address of the DNS server used
( = 497, = 462).
What to check on the DNS server
Is the power of the DNS server on?

Turn on the DNS server.
g
Are the DNS server settings for IP addresses and the corresponding

names correct?
On the DNS server, make sure IP addresses and the corresponding
g
names are entered correctly.
Is the DNS server working correctly?

Check the DNS server settings to make sure it is working correctly
g
as a DNS server.
If applicable, ask your network administrator to ensure the DNS
g
server is available.
What to check on the network as a whole
Does the network that you are trying to connect to via Wi-Fi include a

router or similar device that serves as a gateway?
If applicable, ask your network administrator for the network gateway
g
address and enter it on the camera ( = 497, = 462).
Make sure that the gateway address setting is correctly entered on
g
all network devices including the camera.
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