Hello Stas!   
      
   04 Apr 18 10:54, you wrote to me:   
      
    TK>> curl.exe -4   
    TK>> https://user:pass@ipv4.tunnelbroker.net/nic/update?hostname=123456   
      
    SM> In all listed cases it returns "badauth". Is "user:pass" are equal to   
    SM> username and password on https://tunnelbroker.net?   
      
   No, "user" is your username, "pass" is the update key for your tunnel. The   
   last "123456" is the id number of your tunnel.   
      
   Main Page -> Configured tunnels. Tunnel Details -> Advanced. There you can see   
   example update URL for each of your tunnels.   
      
   I have 2 tunnels which I can update with these:   
      
   https://koivula:xxxxxxxx@ipv4.tunnelbroker.net/nic/update?hostname=311665   
   https://koivula:yyyyyyyy@ipv4.tunnelbroker.net/nic/update?hostname=269894   
      
   Only the update keys faked. :)   
      
   'Tommi   
      
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