Swisscom customers using Internet Guard perturbation
Resolved
Sep 4, 2026 at 4:09pm UTC
Maintenance ended
Affected services
Main website up-network.ch
Client portal
Created
Sep 4, 2026 at 2:45pm UTC
Some Swisscom customers using Internet Guard may currently be unable to access up-network.ch because the domain has been incorrectly flagged by Swisscom's filtering system.
We have notified Swisscom and requested that the false positive be reviewed and removed.
Users experiencing this issue can try using an alternative public DNS resolver, for example:
- SWITCH Public DNS:
130.59.31.248/130.59.31.251 - Quad9:
9.9.9.9/149.112.112.112 - Cloudflare:
1.1.1.1/1.0.0.1 - Google Public DNS:
8.8.8.8/8.8.4.4
SWITCH also supports encrypted DNS:
- DNS-over-TLS:
dns.switch.ch - DNS-over-HTTPS:
https://dns.switch.ch/dns-query
The issue is related to Swisscom Internet Guard filtering and not to an outage or availability problem within the UP-NETWORK infrastructure.
We are monitoring the situation and are waiting for Swisscom to correct the classification.
18:09 Swisscom has removed the blacklist
Affected services
Main website up-network.ch
Client portal