Hi I am running squid(2.6.stable9) with ntlm authentication using samba-3.0.24 and that is working fine for any http access. However while I am trying to connect any instant messaging (Yahoo messenger, MSN) through the proxy, connection is getting failed due to authentication failure. Log shows: [2007/04/12 14:40:39, 1] libsmb/ntlmssp.c:ntlmssp_update(267) got NTLMSSP command 3, expected 1 [2007/04/12 14:40:41, 1] libsmb/ntlmssp.c:ntlmssp_update(267) got NTLMSSP command 3, expected 1 [2007/04/12 14:40:47, 1] libsmb/ntlmssp.c:ntlmssp_update(267) got NTLMSSP command 3, expected 1 [2007/04/12 14:41:12, 1] libsmb/ntlmssp.c:ntlmssp_update(267) got NTLMSSP command 3, expected 1 2007/04/12 14:41:15| Preparing for shutdown after 13 requests Will it require any specific configuration settings to make it work? With regards Suman