Start with the basics.
Make sure ifconfig rl0 shows that the IP and netmask have been configured correctly.
Check the output of netstat -rn to make sure the default gateway has been set correctly.
Then try to ping something locally via IP: ping 192.168.1.1
Then try to ping something locally via DNS (if you have a local DNS server): ping whatever
Then try to ping something remote via IP: ping x.x.x.x
Then try to ping something remote via DNS: ping google.de
The one that fails will tell you where the problem is.
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