About project
SNER is a proactive network monitoring service operated by CESNET for network security and research purposes within the CESNET2 network, and is part of CESNET's NetScan service.
The service continuously maps enrolled networks, performs service discovery, and conducts fingerprinting similar to Shodan, Censys, and Shadowserver services. Participating networks can enhance their visibility within their address space and potentially receive early warnings about possible vulnerabilities.
- GitHub project: https://github.com/snerstack
- Scanning techniques:
- IPv4 address scanning
- IPv6 DNS and adress pattern enumeration
- Nmap-based scannig and service version fingerprinting
- JA3/JARM scanning
- TLS scanning (nmap script. testssl)
- Vulnerability scanning (nuclei)
- Source port scanning
- Data Management:
- Long-term IP-centric storage
- Service version extraction
- Web user-interface
- REST-like API for data access
Scanning sources
Note that the following list is subject to change at any time (machine-readable version).
| Hostname | IPv4 Address | IPv6 Address |
|---|---|---|
| sner2.flab.cesnet.cz | 78.128.214.226 | 2001:718:1808:f000::226 |
| sner3.flab.cesnet.cz | 78.128.214.227 | 2001:718:1808:f000::227 |
| sner4.flab.cesnet.cz | 78.128.214.228 | 2001:718:1808:f000::228 |
| sner5.flab.cesnet.cz | 78.128.214.229 | 2001:718:1808:f000::229 |
| sner6.flab.cesnet.cz | 78.128.214.231 | 2001:718:1808:f000::231 |
| sner7.flab.cesnet.cz | 78.128.214.232 | 2001:718:1808:f000::232 |
| sner8.flab.cesnet.cz | 78.128.214.233 | 2001:718:1808:f000::233 |
| sner9.flab.cesnet.cz | 78.128.248.205 | 2001:718:ff05:10c::205 |
Contact
Acknowledgement
Computational resources were supplied by the project "e-Infrastruktura CZ" (e-INFRA CZ LM2018140 ) supported by the Ministry of Education, Youth and Sports of the Czech Republic.
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