I just tried to set "workers" to a number greater than 1. After restarting Squid no one is listening to port 3128. Setting it back to 1 resolves the issue. I'm sure I'm missing something simple but I have searched for hours and can't figure it out. Here's my setup: squid -v Squid Cache: Version 3.3.4 configure options: '--with-openssl=/usr/local/ssl' '--prefix=/opt/squid' '--enable-ssl' --enable-ltdl-convenience squid.conf: # squid.conf workers 1 acl manager url_regex -i ^cache_object:// /squid-internal-mgr/ acl localnet src 127.0.0.1 acl localnet src 172.16.0.0/16 http_access allow manager localnet http_access deny manager acl TRACE method TRACE acl SSL_ports port 443 acl Safe_ports port 80 # http # acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https # acl Safe_ports port 70 # gopher # acl Safe_ports port 210 # wais # acl Safe_ports port 1025-65535 # unregistered ports # acl Safe_ports port 280 # http-mgmt # acl Safe_ports port 488 # gss-http # acl Safe_ports port 591 # filemaker # acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT acl www dstdomain www.8f7.com x01.phx01.bkck.net 172.16.1.201 acl bkckxserve2 dstdomain bkckxserve2.8f7.com x02.phx01.bkck.net 172.16.1.202 acl test dstdomain test.8f7.com x03.phx01.bkck.net 172.16.1.203 acl www04 dstdomain www04.8f7.com x04.phx01.bkck.net 172.16.1.204 acl bkckxserve5 dstdomain bkckxserve5.8f7.com x05.phx01.bkck.net 172.16.1.205 acl bkckxserve6 dstdomain bkckxserve6.8f7.com x06.phx01.bkck.net 172.16.1.206 acl bkckxserve7 dstdomain bkckxserve7.8f7.com x07.phx01.bkck.net 172.16.1.207 acl www08 dstdomain www08.8f7.com x08.phx01.bkck.net 172.16.1.208 acl www09 dstdomain www09.8f7.com x09.phx01.bkck.net 172.16.1.209 acl test2 dstdomain test2.8f7.com x10.phx01.bkck.net 172.16.1.210 acl www10 dstdomain www11.8f7.com x11.phx01.bkck.net 172.16.1.211 acl www11 dstdomain www11.8f7.com x11.phx01.bkck.net 172.16.1.211 acl www12 dstdomain www12.8f7.com x12.phx01.bkck.net 172.16.1.212 http_access deny TRACE http_access deny !Safe_ports # http_access deny CONNECT !SSL_ports http_access deny CONNECT !Safe_ports http_access allow www http_access allow bkckxserve2 http_access allow test http_access allow www04 http_access allow bkckxserve5 http_access allow bkckxserve6 http_access allow bkckxserve7 http_access allow www08 http_access allow www09 http_access allow www10 http_access allow www11 http_access allow www12 http_access allow test2 http_access deny all icp_access deny all htcp_access deny all http_port 3128 accel protocol=http vhost cache_peer 172.16.1.101 parent 19080 0 originserver no-query proxy-only login=PASS name=www cache_peer 172.16.1.102 parent 19080 0 originserver no-query proxy-only login=PASS name=bkckxserve2 cache_peer 172.16.1.103 parent 19080 0 originserver no-query proxy-only login=PASS name=test cache_peer 172.16.1.104 parent 19080 0 originserver no-query proxy-only login=PASS name=www04 cache_peer 172.16.1.105 parent 19080 0 originserver no-query proxy-only login=PASS name=bkckxserve5 cache_peer 172.16.1.106 parent 19080 0 originserver no-query proxy-only login=PASS name=bkckxserve6 cache_peer 172.16.1.107 parent 19080 0 originserver no-query proxy-only login=PASS name=bkckxserve7 cache_peer 172.16.1.108 parent 19080 0 originserver no-query proxy-only login=PASS name=www08 cache_peer 172.16.1.109 parent 19080 0 originserver no-query proxy-only login=PASS name=www09 cache_peer 172.16.1.110 parent 19080 0 originserver no-query proxy-only login=PASS name=test2 cache_peer 172.16.1.111 parent 19080 0 originserver no-query proxy-only login=PASS name=www11 cache_peer 172.16.1.112 parent 19080 0 originserver no-query proxy-only login=PASS name=www12 cache_peer_domain www www.8f7.com x01.phx01.bkck.net 172.16.1.201 cache_peer_domain bkckxserve2 bkckxserve2.8f7.com x02.phx01.bkck.net 172.16.1.202 cache_peer_domain test test.8f7.com x03.phx01.bkck.net 172.16.1.203 cache_peer_domain www04 www04.8f7.com x04.phx01.bkck.net 172.16.1.204 cache_peer_domain bkckxserve5 bkckxserve5.8f7.com x05.phx01.bkck.net 172.16.1.205 cache_peer_domain bkckxserve6 bkckxserve6.8f7.com x06.phx01.bkck.net 172.16.1.206 cache_peer_domain bkckxserve7 bkckxserve7.8f7.com x07.phx01.bkck.net 172.16.1.207 cache_peer_domain www08 www08.8f7.com x08.phx01.bkck.net 172.16.1.208 cache_peer_domain www09 www09.8f7.com x09.phx01.bkck.net 172.16.1.209 cache_peer_domain test2 test2.8f7.com vm10.phx01.bkck.net 172.16.1.210 cache_peer_domain www11 www11.8f7.com x11.phx01.bkck.net 172.16.1.211 cache_peer_domain www12 www12.8f7.com x12.phx01.bkck.net 172.16.1.212 hierarchy_stoplist cgi-bin ? access_log /opt/squid/var/logs/access.log squid cache_log /opt/squid/var/logs/cache.log cache_store_log /opt/squid/var/logs/store.log visible_hostname sq04.phx01.bkck.net refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern (cgi-bin|\?) 0 0% 0 refresh_pattern . 0 20% 4320
