[Squid] Squid 配置了 cache

配置如下：

# Squid normally listens to port 3128
always_direct allow all
ssl_bump bump all
sslproxy_cert_error allow all
http_port 3128 ssl-bump cert=/etc/squid/squid.pem key=/etc/squid/squid.pem generate-host-certificates=on options=NO_SSLv2
#http_port 3128

cache_peer 127.0.0.1 parent 10809 0 no-query
never_direct allow all

我测试了一下，它并没有通过 127.0.0.1:10809 上网？但是让我改成如下时，却生效了。

http_port 3128

cache_peer 127.0.0.1 parent 10809 0 no-query
never_direct allow all

这是为什么？

完整配置

#
# Recommended minimum configuration:
#

# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 172.16.0.0/12  # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl localnet src fc00::/7       # RFC 4193 local private network range
acl localnet src fe80::/10      # RFC 4291 link-local (directly plugged) machines

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

#
# Recommended minimum Access Permission configuration:
#
# Deny requests to certain unsafe ports
http_access deny !Safe_ports

# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports

# Only allow cachemgr access from localhost
http_access allow localhost manager
http_access deny manager

# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on "localhost" is a local user
#http_access deny to_localhost

#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#

# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed
http_access allow localnet
http_access allow localhost

# And finally deny all other access to this proxy
http_access deny all

# Squid normally listens to port 3128
always_direct allow all
ssl_bump bump all
sslproxy_cert_error allow all
http_port 3128 ssl-bump cert=/etc/squid/squid.pem key=/etc/squid/squid.pem generate-host-certificates=on options=NO_SSLv2
#http_port 3128

cache_peer 127.0.0.1 parent 10809 0 no-query
never_direct allow all

# Uncomment and adjust the following to add a disk cache directory.
cache_dir ufs /var/cache/squid 100 16 256

# Leave coredumps in the first cache dir
coredump_dir /var/cache/squid

#
# Add any of your own refresh_pattern entries above these.
#
refresh_pattern ^ftp:       1440    20% 10080
refresh_pattern ^gopher:    1440    0%  1440
refresh_pattern -i (/cgi-bin/|\?) 0 0%  0
refresh_pattern .       0   20% 4320

dns_nameservers 8.8.8.8