Approved and Accessible Sites through SIFY Network:
All links Under India Post:
https://services.ptcmysore.gov.in/Speednet/
https://services.ptcmysore.gov.in/RNet
https://services.ptcmysore.gov.in/emo
https://services.ptcmysore.gov.in/uidreports/
https://services.ptcmysore.gov.in/AccountsMIS/
http://indiapostarrow.gov.in/arrow/default.asp
http://www.indiapost.gov.in/RuralInfrastructure/
http://ptcinfo.org/eiodweb/
http://www.indiapost.gov.in/ccc/
http://www.ptcinfo.org/DigiFrank/
http://www.ptcinfo.org/eurogiro/
https://services.ptcmysore.gov.in/spc/
https://www.epostoffice.gov.in/
http://indiapost.nic.in/
https://mail.gov.in/iwc_static/layout/new_login.jsp
http://www.indiapost.gov.in/SpeedPost.aspx
http://www.indiapost.gov.in/ExpressParcel.aspx
http://www.indiapost.gov.in/IMOS.aspx
http://www.indiapost.gov.in/BusinessPost.aspx
http://ipsweb.ptcmysore.gov.in/ipswebtracking/
http://services.ptcmysore.gov.in/Speednettracking/Track/UIDTrack.aspx
https://wupos.westernunion.com/agent-app/login
http://www.reliancegold.in/jsp/userLogin.jsp
https://services.dopmobile.in/MerchantApp/
http://mail.nic.in
SDC Chennai:
tamilnadupost.nic.in/sdc/index.htm
Private Sites:
www.google.com
www.yahoo.com
All other Sites were blocked by SIFY Network as per DOP Order.
Source : http://potools.blogspot.in/