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Best Way To Fix Error Opening TFTP Authorization Failed

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    In this user guide, we will cover some of the possible reasons that might lead to the tftp not opening failed error and then we will suggest possible fixes that you can try to solve this problem.

    I have a cisco 2801 router with ios version 12.3(8r)T9 c2801-ipvoice_ivs-mz.151-3.T.bin and I want to upgrade using 15.For 1 as the cme router because recently released ios does not support some related commands as such (encryption keys).

    First, we need to suggest the best iOS to use cme. and the second problem i will face is copying iOS to router flash by browsing it with tftp. Whenever I tried to replicate flash from tftp to host router flash, it throws an error like % Failed to start tftp://1.1.1.2/c2801-adventerprisek9-mz.151-4.M12a.bin (No such a file or directory) and I have also tried postback as iOS flash from the router to the tftp server in case errors like % Failed to start tftp://1.1.1.2/c2801 -ipvoice_ivs-mz .151-3 .T .bin (permission denied)

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    I tried almost everything I knew. just disable windows firewall. Run the TFTP PC software with administrator rights. and also adding the Windows firewall concept for TFTP 69 forwarding. but nothing has changed.


    error opening tftp permission denied failed

    The same applies to the topic: I had the same illness and hit my head on the table. Basically I have windows firewall and BINGO! I’m sure I can set this up for login/logout later, but temporarily removing the firewall during the procedure interval worked just fine. Thanks for the tips!

    By the way, I . Mister. using Windows XP Pro on different types of TFTP servers.

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