June 2, 2021 at 3:33:10 PM UTC
VERIFY
Anomaly
DNS tampering
Websites
Runtime: 1.5s
On June 2, 2021 at 3:33:10 PM UTC, http://ocsp.int-x3.letsencrypt.org/ presented signs of DNS tampering on AS31721 in Azerbaijan.
This might mean that http://ocsp.int-x3.letsencrypt.org/ was blocked, but false positives can occur.
Please explore the network measurement data below.
Failures
HTTP Experiment
null
DNS Experiment
null
Control
null
DNS Queries
Resolver:
5.191.33.1
Query:
IN A ocsp.int-x3.letsencrypt.org
Engine:
system
Name
Class
TTL
Type
DATA
Answer IP Info
@
IN
A
62.212.253.10
AS29049 (Delta Telecom Ltd)
@
IN
A
62.212.253.9
AS29049 (Delta Telecom Ltd)
TCP Connections
62.212.253.10:80: succeeded
62.212.253.9:80: succeeded
HTTP Requests
URL
GET http://ocsp.int-x3.letsencrypt.org/
Response Headers
Cache-Control:max-age=34243Connection:keep-aliveContent-Length:0Date:Wed, 02 Jun 2021 15:33:13 GMTExpires:Thu, 03 Jun 2021 01:03:56 GMTServer:nginx
Response Body
Empty body
Resolver
Resolver ASN
AS31721
Resolver IP
5.191.33.1
Resolver Network Name
"Azercell Telecom Ltd" Azerbaijan-Turkey Joint Venture
Measurement UID
20210602153313.405351_AZ_webconnectivity_814719beb39c54c8
Report ID
20210602T153000Z_webconnectivity_AZ_31721_n1_p9rE1NSBY6zoJ1dd
Platform
windows
Software Name
ooniprobe-desktop-unattended (3.9.2)
Measurement Engine
ooniprobe-engine (3.9.2)