Telnet to port 53 does not work. It seems the packets are dropped but I don't see any rule which would be the reason for that. ISP1 is not connected because that is our main connection, I can only work on that on Sundays. Currently everything is routed via ISP2. Ping etc. works fine, except DNS is not willing to answer.
aw@srx100> show route 0/0 exact | no-more
inet.0: 11 destinations, 11 routes (11 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
0.0.0.0/0 *[Static/5] 01:56:02
> to 192.168.10.1 via fe-0/0/1.0
routing-table-ISP2.inet.0: 9 destinations, 9 routes (9 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
0.0.0.0/0 *[Static/5] 00:18:56
> to 192.168.10.1 via fe-0/0/1.0