> > The problem is that netinet/in.h must be included before arpa/inet.h in > include/util.h (at least for 3.1.11). Just add > #include <netinet/in.h> before the #include <arpa/inet.h> line in this > file. At least that fixed the same problem with Squid 3.1.11 on OpenBSD 4.9. Thanks for your help. Sorry for the delay in replying. As said, I added the below 2 lines to include/util.h file #include <netinet/in.h> #include <arpa/inet.h> then. configure with below options Squid Cache: Version 3.2.0.6 configure options: '--datadir=/usr/local/share/squid' '--enable-arp-acl' '--enable-basic-auth-helpers=NCSA' '--enable-digest-auth-helpers=password' '--enable-delay-pools' '--enable-external-acl-helpers=ip_user' '--enable-forw-via-db' '--enable-negotiate-auth-helpers=squid_kerb_auth' '--enable-pf-transparent' '--enable-removal-policies=lru' '--enable-ssl' '--enable-storeio=aufs' '--with-pthreads' '--localstatedir=/var/squid' '--prefix=/usr/local' '--sysconfdir=/etc/squid' '--mandir=/usr/local/man' '--infodir=/usr/local/info' --enable-ltdl-convenience then, did make and make install. it went fine. I added below line to squid.conf file http_port 3129 intercept cache_mem 256 MB cache_effective_user _squid cache_effective_group _squid # Define the access log format logformat squid %ts.%03tu %6tr %>a %Ss/%03>Hs %<st %rm %ru %un %Sh/%<A %mt # Log client request activities ('squid' is the name of the log format to use) access_log /var/squid/logs/access.log squid # Log information about the cache's behavior cache_log /var/squid/logs/cache.log # Log the activities of the storage manager cache_store_log /var/squid/logs/store.log We can access with squid. But , I get the below error # tail -f /var/squid/logs/cache.log 2011/04/08 18:07:26 kid1| Intercept.cc(305) PfInterception: PF open failed: (13) Permission denied 2011/04/08 18:07:35 kid1| Intercept.cc(305) PfInterception: PF open failed: (13) Permission denied 2011/04/08 18:07:35 kid1| Intercept.cc(305) PfInterception: PF open failed: (13) Permission denied any idea? shall we solve ? permision of /dev/pf crw------- 1 root wheel 73, 0 Apr 1 19:30 /dev/pf -- Thank you Indunil Jayasooriya