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  • DNS connectivity:

    % check-soa -i webex.com              
    ns1.as13445.net.
    	66.163.52.1: OK: 2017275107 (15 ms)
    ns2.as13445.net.
    	66.163.53.1: OK: 2017275107 (14 ms)
  • Short TTL :

    % dig A unilu.webex.com 
    
    ; <<>> DiG 9.16.1-Ubuntu <<>> A unilu.webex.com
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34971
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
    
    ;; OPT PSEUDOSECTION:
    ; EDNS: version: 0, flags: do; udp: 1232
    ;; QUESTION SECTION:
    ;unilu.webex.com.	IN A
    
    ;; ANSWER SECTION:
    unilu.webex.com.	26 IN CNAME nebulaag.webex.com.
    nebulaag.webex.com.	26 IN CNAME global-nebulaag.webex.com.
    global-nebulaag.webex.com. 10 IN A 170.72.18.7
    
    ;; Query time: 27 msec
    ;; SERVER: 192.168.2.254#53(192.168.2.254)
    ;; WHEN: mar. févr. 15 18:37:42 CET 2022
    ;; MSG SIZE  rcvd: 113
  • When the network breaks:

    % mtr --report-wide 170.72.18.7
    Start: 2022-02-15T18:43:42+0100
    HOST: smoking                                   Loss%   Snt   Last   Avg  Best  Wrst StDev
      1.|-- _gateway                                   0.0%    10    1.4   1.9   1.4   2.6   0.3
      2.|-- vlz74-2_migr-78-196-62-254.fbx.proxad.net  0.0%    10    3.5   3.4   3.1   3.9   0.3
      3.|-- 78.255.21.126                              0.0%    10    2.5   2.7   2.5   3.2   0.2
      4.|-- los75-asr903-1-bd902.intf.nro.proxad.net   0.0%    10    2.8   3.1   2.5   3.9   0.5
      5.|-- reg75-asr903-1-bd904.intf.nro.proxad.net   0.0%    10    2.9   2.7   2.5   3.0   0.2
      6.|-- p13-9k-3-be2005.intf.nro.proxad.net        0.0%    10    3.2   4.3   3.1  13.7   3.3
      7.|-- ???                                       100.0    10    0.0   0.0   0.0   0.0   0.0
  • Nothing special seen on RIPEstat

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