Squid（代理）正在消耗它自己的資源（和其他問題）

我有幾個魷魚問題，但一次一個；

警告！您的記憶體已用完文件描述符

當代理接到很多電話時可能會發生這種情況，並且可以通過增加限制來解決，但我的甚至還沒有“打開”..

我發現它是魷魚，它以某種方式不斷地連接到它自己？

（來自我的 access.log）

1628674032.019  59108 192.168.0.129 NONE/200 0 CONNECT 192.168.0.129:3129 - ORIGINAL_DST/192.168.0.129 -
1628674032.019  59098 192.168.0.129 NONE/200 0 CONNECT 192.168.0.129:3129 - ORIGINAL_DST/192.168.0.129 -
1628674032.019  59087 192.168.0.129 NONE/200 0 CONNECT 192.168.0.129:3129 - ORIGINAL_DST/192.168.0.129 -

我的配置最初是由 pfsense 創建的，但用於在 Ubuntu 20.04 上執行的獨立 squid

# This file is automatically generated by pfSense
# Do not edit manually !
acl all src all
http_access allow all
http_port 3128 ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=10MB cert=/usr/local/squid/etc/ssl_cert/myCA.pem  cafile=/usr/local/squid/etc/ssl_cert/myCA.crt capath=/usr/local/squid/etc/rootca/ cipher=EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+aRSA+RC4:EECDH:EDH+aRSA:!RC4:!aNULL:!eNULL:!LOW:!3DES:!SHA1:!MD5:!EXP:!PSK:!SRP:!DSS tls-dh=prime256v1:/usr/local/squid/etc/dhparam.pem options=NO_SSLv3,NO_TLSv1,SINGLE_DH_USE,SINGLE_ECDH_USE

https_port 3129 intercept ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=10MB cert=/usr/local/squid/etc/ssl_cert/myCA.pem cafile=/usr/local/squid/etc/rootca/ca-root-nss.crt capath=/usr/local/squid/etc/rootca/ cipher=EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+aRSA+RC4:EECDH:EDH+aRSA:!RC4:!aNULL:!eNULL:!LOW:!3DES:!SHA1:!MD5:!EXP:!PSK:!SRP:!DSS tls-dh=prime256v1:/usr/local/squid/etc/dhparam.pem options=NO_SSLv3,NO_TLSv1,SINGLE_DH_USE,SINGLE_ECDH_USE

#tcp_outgoing_address 10.10.66.1
icp_port 0
#digest_generation off
dns_v4_first on
#pid_filename /var/run/squid/squid.pid  
cache_effective_user proxy
cache_effective_group proxy
error_default_language en
#icon_directory /usr/local/etc/squid/icons
visible_hostname Satan
cache_mgr admin@localhost
access_log /var/log/squid/access.log
cache_log /var/log/squid/cache.log
cache_store_log none
netdb_filename /var/log/squid/netdb.state
pinger_enable on
pinger_program /usr/lib/squid/pinger
sslcrtd_program /usr/lib/squid/security_file_certgen -s /usr/local/squid/var/logs/ssl_db -M 4MB -b 4096

tls_outgoing_options cafile=/usr/local/squid/etc/rootca/ca-root-nss.crt 
tls_outgoing_options capath=/usr/local/squid/etc/rootca/
tls_outgoing_options options=NO_SSLv3,NO_TLSv1,SINGLE_DH_USE,SINGLE_ECDH_USE
tls_outgoing_options cipher=EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+aRSA+RC4:EECDH:EDH+aRSA:!RC4:!aNULL:!eNULL:!LOW:!3DES:!SHA1:!MD5:!EXP:!PSK:!SRP:!DSS
sslcrtd_children 5

logfile_rotate 10
debug_options rotate=0
shutdown_lifetime 3 seconds
# Allow local network(s) on interface(s)
acl localnet src  192.168.0.0/24
forwarded_for delete
via off
httpd_suppress_version_string on
uri_whitespace strip

acl dynamic urlpath_regex cgi-bin \?
cache deny dynamic

cache_mem 2048 MB
maximum_object_size_in_memory 8192 KB
memory_replacement_policy heap GDSF
cache_replacement_policy heap LFUDA
minimum_object_size 0 KB
maximum_object_size 16 MB
cache_dir aufs /cache 10000 16 256
offline_mode off
cache_swap_low 90
cache_swap_high 95
cache allow all
# 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


#Remote proxies


# Setup some default acls
# ACLs all, manager, localhost, and to_localhost are predefined.
acl allsrc src all
acl safeports port 21 70 80 210 280 443 488 563 591 631 777 901  3128 3129 1025-65535 
acl sslports port 443 563  

acl purge method PURGE
acl connect method CONNECT

# Define protocols used for redirects
acl HTTP proto HTTP
acl HTTPS proto HTTPS

# SslBump Peek and Splice
# http://wiki.squid-cache.org/Features/SslPeekAndSplice
# http://wiki.squid-cache.org/ConfigExamples/Intercept/SslBumpExplicit
# Match against the current step during ssl_bump evaluation [fast]
# Never matches and should not be used outside the ssl_bump context.
#
# At each SslBump step, Squid evaluates ssl_bump directives to find
# the next bumping action (e.g., peek or splice). Valid SslBump step
# values and the corresponding ssl_bump evaluation moments are:
#   SslBump1: After getting TCP-level and HTTP CONNECT info.
#   SslBump2: After getting TLS Client Hello info.
#   SslBump3: After getting TLS Server Hello info.
# These ACLs exist even when 'SSL/MITM Mode' is set to 'Custom' so that
# they can be used there for custom configuration.
acl step1 at_step SslBump1
acl step2 at_step SslBump2
acl step3 at_step SslBump3
http_access allow manager localhost

http_access deny manager
http_access allow purge localhost
http_access deny purge
http_access deny !safeports
http_access deny CONNECT !sslports

# Always allow localhost connections
http_access allow localhost

request_body_max_size 0 KB
delay_pools 1
delay_class 1 2
delay_parameters 1 -1/-1 -1/-1
delay_initial_bucket_level 100
delay_access 1 allow allsrc

# Reverse Proxy settings


# Custom options before auth


ssl_bump peek step1
ssl_bump bump all
# Setup allowed ACLs
# Allow local network(s) on interface(s)
http_access allow localnet
# Default block all to be sure
http_access deny allsrc

其他獎勵問題是：

2.我只使用https/ssl時是否需要http配置（埠3128）

2. 是的，顯然這是必要的
3. acl all src all（配置中的第一個命令）在 syslog 中產生以下結果，這只是一個警告，但我該如何解決呢？

---

Aug 11 12:28:46 socks squid[2718]: WARNING: because of this '::/0' is ignored to keep splay tree searching predictable
Aug 11 12:28:46 socks squid[2718]: WARNING: You should probably remove '::/0' from the ACL named 'all'

---

4. 如果您發現其他任何問題，請說出來，如果可能，請解釋原因（以便我們學習）

這種情況下的壞人實際上是一個禁用的選項..

#tcp_outgoing_address 10.10.66.1

由於某種原因，squid 伺服器顯然不知道將輸出數據發送到哪裡，並將其發送給自己，從而導致無休止的循環。

通過啟用此命令並將其指向我的外部 ip，這樣做可以避免環回。

對我來說，這將是一個不必要的命令，並且無法理解為什麼它是必要的，魷魚應該知道網際網路在哪裡..

引用自：https://unix.stackexchange.com/questions/664236