Gracias por la rapida respuesta.
Desde el ordenador fijo (windows) probado con Chrome, Edge y Firefox, en modos normal e incognito/inprivate. Timeout. Si activo en Chrome ToucVPN o HotSpot Shield, la web aparece y se navega sin problemas.
Mismo comportamiento en un portatil.
En ambos casos probado por cable al router y por wifi con identico comportamiento.
En los moviles, uno iOS y otro Android, por wifi, misma situacion, no funciona. En cuanto apago la wifi y sale por la red movil (Vodafone), funciona correctamente.
Ya probe a reiniciar el router, y cambiar los DNS, pero el problema sigue.
Tracing route to sede.agenciatributaria.gob.es [195.77.198.30]
over a maximum of 30 hops:
1 2 ms 1 ms 1 ms 192.168.0.1
2 * * * Request timed out.
3 11 ms 9 ms 9 ms cm-staticip-212-89-30-102.telecable.es [212.89.30.102]
4 * * * Request timed out.
5 24 ms 20 ms 22 ms 172.20.31.69
6 23 ms 22 ms 21 ms 172.22.190.122
7 * 27 ms 29 ms 172.20.31.77
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 29 ms 25 ms 24 ms 150.red-81-41-246.staticip.rima-tde.net [81.41.246.150]
12 26 ms 26 ms 25 ms 166.red-213-0-187.static.ccgg.telefonica.net [213.0.187.166]
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.
Trace complete.