Entry into the logs is restricted to some degree. Those with usernames and passwords may read any of the LIGO logs, but will have write access only in their own group's log(s).
Read-only access is available to anyone by entering "reader" as the username and "readonly" as the password when entering any of the logs.
David Shoemaker's Style Guide for ILOG entries
LIGO Logs at Hanford
LIGO Logs at Caltech