Internet Measurement Research — Probe Notification

Your IP address or network is receiving probe packets from this host as part of an academic Internet measurement study. These probes are benign and do not exploit vulnerabilities or collect user data. If you wish to opt out, see the instructions below.

Study overview

We are conducting peer-reviewed academic research on Internet reachability, routing behavior, and network outages, with a focus on measuring the effects of large-scale Internet disruptions..

What probes are sent from this host?

Probe type	Protocol / Port	Purpose
TCP SYN reachability	TCP/22, 80, 443, 8080, 8443, 25, 53	Determines whether a host is reachable and which services respond
ICMP echo (ping)	ICMP type 8	Round-trip latency and basic reachability
Traceroute / path tracing	ICMP / UDP with increasing TTL	Identifies network topology and where in the path connectivity fails
TLS handshake	TCP/443	Certificate presence and validity (no content collected)
UDP DNS probe	UDP/53	Tests whether UDP routing is intact independently of TCP
HTTP request	TCP/80	Tests application-layer reachability; only response code recorded, no content stored

Probe frequency: Approximately 6 probe packets per IP address per 10-minute measurement cycle from each active vantage point. Probes are sent from up to 6 geographic vantage points simultaneously. No scanning of sequential IP ranges is performed — only specific publicly routable addresses associated with the network under study are probed.

Data collected: Whether a connection attempt succeeded or timed out, response latency, and TLS certificate metadata (issuer, expiry date, common name). No payload content, no credentials, no user data of any kind is collected or stored.

Who is conducting this research?

This research is conducted by Ali Sadeghi Jahromi, Postdoctoral Researcher at Carleton University.

Institutional contact: [email protected] | Department: Systems and Computer Engineering, Carleton University.

Ethics and compliance

All probed addresses are publicly routable IP addresses. No private, RFC 1918, or link-local addresses are probed.
Probe rates are kept at the minimum necessary to obtain statistically meaningful measurements.
No systems are accessed, no vulnerabilities exploited, and no user data is collected.
Opt-out requests are honored within 24 hours and maintained permanently.
This notice page is referenced in the User-Agent header of all HTTP probes sent from our vantage points.

How to opt out

To stop receiving probes, send an email to [email protected] with subject line Measurement Opt-Out. Include the IP address or range of IP addresses you wish to exclude. We will:

Stop all probes to your address space within 24 hours
Add your entry to our permanent exclusion list
Reply to confirm the exclusion has been applied
None of the opt-out information will be shared with any third parties.
If you have any questions or concerns about the study or the opt-out process, please contact us at the email address above.