Dansguardian will not start up if it's Proxy Server (Squid) isn't available.

The startup default links are S20dansguardian and S20squid. So squid is starting after dansguardian.

/etc/rc6.d/K20dansguardian
/etc/rc2.d/S20dansguardian
/etc/rc4.d/S20dansguardian
/etc/rc0.d/K20dansguardian
/etc/rc5.d/S20dansguardian
/etc/rc1.d/K20dansguardian
/etc/rc3.d/S20dansguardian

This is the fix I used:

update-rc.d -f dansguardian start 50 2 3 4 5 . stop 20 0 1 6 .

/etc/rc6.d/K20dansguardian
/etc/rc2.d/S50dansguardian
/etc/rc4.d/S50dansguardian
/etc/rc0.d/K20dansguardian
/etc/rc5.d/S50dansguardian
/etc/rc1.d/K20dansguardian
/etc/rc3.d/S50dansguardian