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You are filtering your from ports? 53 is the to port. The from port will be any random port greater than 1023.
On Tue, 2020-12-29 at 16:19 +0000, Richard Schoen wrote:
Hi All,
Trying to determine which ports I need to allow through the IBM i packet filter mechanism to be able to do name server lookups for PING and NSLOOKUP.
Port 53 TCP/UDP is the usual suspect, but more than that seems to be needed if using the built-in IBMi packet filtering.
I also turned on ICMP and that didn't help.
Q: Is there an IBMi port I am missing for simple name server resolution ?
I can get it to work by allowing all traffic just to my external DNS server site address, but this seems like it should not be necessary.
Thoughts appreciated.
Regards,
Richard Schoen
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