Hi, Testing the 2.6 Pre. With "pipeline_prefetch on " run into a lot of problems. Jun 18 19:06:16 dns2 squid[20839]: parseHttpRequest: NF getsockopt(SO_ORIGINAL_DST) failed: (92) Protocol not available Jun 18 19:07:45 dns2 squid[20839]: parseHttpRequest: NF getsockopt(SO_ORIGINAL_DST) failed: (92) Protocol not available Jun 18 19:07:45 dns2 squid[20839]: assertion failed: HttpHeader.c:576: "0" Jun 18 19:07:45 dns2 squid[20837]: Squid Parent: child process 20839 exited due to signal 6 Jun 18 19:07:48 dns2 squid[20837]: Squid Parent: child process 20879 started Jun 18 19:07:48 dns2 squid[20879]: Starting Squid Cache version 2.6.PRE2-20060618 for i686-pc-linux-gnu... This comes out everytime cachemgr tries to access squid with 'pipeline_prefetch on '. ( Tried new and old versions of cachemgr.cgi ) and child dies and respawns. The same cachemgr works fine on my production 2.5.14 caches. Also for some sites the message is seen( access to many sites, even connection by cachemgr after pipeline option is removed). 2006/06/18 20:54:46| parseHttpRequest: NF getsockopt(SO_ORIGINAL_DST) failed: (92) Protocol not available 2006/06/18 21:00:46| parseHttpRequest: NF getsockopt(SO_ORIGINAL_DST) failed: (92) Protocol not available 2006/06/18 21:00:46| CACHEMGR: root@xxxxxxxxxxxxxx requesting 'info' 2006/06/18 21:02:10| parseHttpRequest: NF getsockopt(SO_ORIGINAL_DST) failed: (92) Protocol not available 2006/06/18 21:02:11| CACHEMGR: root@xxxxxxxxxxxxxx requesting 'filedescriptors' 2006/06/18 21:02:26| CACHEMGR: root@xxxxxxxxxxxxxx requesting 'filedescriptors' ( a refresh doesn't return that error as shown above) Conclusions. 1. pipeline_prefetech and cachemgr don't like each other ;-) 2. May be transparent mode requires some more fine tuning. ( i used wccp1 ) Couldn't find a way to do stack trace properly, if guided will do more debugging. RGDS Sk