HTTP slow and HTTPS sometimes end up with error page…

sqrobin · Jan 22, 2018, 3:02 AM

Hi all,

I'm using pfsense 2.4.2-RELEASE-p1 (amd64)

System VMware Virtual Machine
Netgate Device ID: 0b04cb9c68032f0927c2
BIOS Vendor: Phoenix Technologies LTD
Version: 6.00
Release Date: Tue Sep 30 2014
Version 2.4.2-RELEASE-p1 (amd64)
built on Tue Dec 12 13:45:26 CST 2017
FreeBSD 11.1-RELEASE-p6

The system is on the latest version.
Version information updated at Mon Jan 22 8:40:32 WIB 2018
CPU Type Intel(R) Xeon(R) CPU E5-2697 v3 @ 2.60GHz
56 CPUs: 1 package(s) x 56 core(s)
AES-NI CPU Crypto: Yes (inactive)

RAM 32Gb

having HTTPS MIM with splice all mode…
squidguard activated

below is my squid.conf

This file is automatically generated by pfSense

Do not edit manually !

http_port x.x.x.x:3128 ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=10MB cert=/usr/local/etc/squid/serverkey.pem capath=/usr/local/share/certs/ 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:/etc/dh-parameters.2048 options=NO_SSLv2,NO_SSLv3,NO_TLSv1,SINGLE_DH_USE,SINGLE_ECDH_USE

http_port 127.0.0.1:3128 intercept ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=10MB cert=/usr/local/etc/squid/serverkey.pem capath=/usr/local/share/certs/ 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:/etc/dh-parameters.2048 options=NO_SSLv2,NO_SSLv3,NO_TLSv1,SINGLE_DH_USE,SINGLE_ECDH_USE

https_port 127.0.0.1:3129 intercept ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=10MB cert=/usr/local/etc/squid/serverkey.pem capath=/usr/local/share/certs/ 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:/etc/dh-parameters.2048 options=NO_SSLv2,NO_SSLv3,NO_TLSv1,SINGLE_DH_USE,SINGLE_ECDH_USE

icp_port 0
digest_generation off
dns_v4_first on
pid_filename /var/run/squid/squid.pid
cache_effective_user squid
cache_effective_group proxy
error_default_language en
icon_directory /usr/local/etc/squid/icons
visible_hostname xxxxxxx
cache_mgr xxxxxxxx
access_log /var/squid/logs/access.log
cache_log /var/squid/logs/cache.log
cache_store_log none
netdb_filename /var/squid/logs/netdb.state
pinger_enable on
pinger_program /usr/local/libexec/squid/pinger
sslcrtd_program /usr/local/libexec/squid/ssl_crtd -s /var/squid/lib/ssl_db -M 4MB -b 2048
sslcrtd_children 5
sslproxy_capath /usr/local/share/certs/
sslproxy_options NO_SSLv2,NO_SSLv3,NO_TLSv1,SINGLE_DH_USE,SINGLE_ECDH_USE
sslproxy_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
sslproxy_cert_error allow all
sslproxy_cert_adapt setValidAfter all

logfile_rotate 7
debug_options rotate=7
shutdown_lifetime 3 seconds

Allow local network(s) on interface(s)

acl localnet src x.x.x.x/29
forwarded_for delete
via off
httpd_suppress_version_string on
uri_whitespace strip

All Files

######################

refresh_pattern -i (.|-)(exe|bin|[n|t]ar|acv|[r|j]ar|t?gz|[g|b]z[ip]?2?|7?z[ip]?|zip|wm[v|a]|patch|diff|mar|vpu|inc|r[a|p]m|kom|iso|sys|[ap]sf|ms[i|u|f]|dat|msi|cab|psf|dvr-ms|ace|asx|qt|xt|esd)[?.*]?$ 43200 100% 432000 override-expire override-lastmod reload-into-ims ignore-reload ignore-no-cache ignore-no-store ignore-private ignore-auth

#Apple Files
refresh_pattern -i (.|-)(ap[k|p]|dmg|ip[a|sw]|pkg)(?.*)?$ 43200 100% 432000 override-expire override-lastmod reload-into-ims ignore-reload ignore-no-cache ignore-no-store ignore-private ignore-auth

#Video Audio, Flash
refresh_pattern -i (.|-)(webm|(x-)?swf|mp(eg)?(3|4)|mpe?g(av)?|(x-)?f(l|4)v|divx?|rmvb?|mov|trp|ts|avi|m38u|wmv|wmp|m4v|mkv|asf|dv|vob|3gp?2?)(?.)?$ 43200 100% 432000 override-expire override-lastmod reload-into-ims ignore-reload ignore-no-cache ignore-no-store ignore-private ignore-auth
refresh_pattern -i (.|-)(mp(3|4)|m4a|aa?c3?|wm?av?|og(x|v|a|g)|ape|mka|au|aiff|flac|m4(b|r)|m1v|m2(v|p)|mo(d|v)|arj|appx|lha|lzh|on2)(?.)?$ 43200 100% 432000 override-expire override-lastmod reload-into-ims ignore-reload ignore-no-cache ignore-no-store ignore-private ignore-auth

#images
refresh_pattern -i (.|-)(ico(.)?|pn[pg]|css|(g|t)iff?|jpe?g(2|3|4)?|psd|c(d|b)r|cad|bmp|img)(?.)?$ 43200 100% 432000 override-lastmod reload-into-ims ignore-no-cache ignore-no-store ignore-private ignore-auth refresh-ims

#Website
refresh_pattern -i (.|-)(xml|js|jsp|txt|css)(?.*)?$ 360 40% 1440 refresh-ims
refresh_pattern -i .index.(html|htm)$ 0 40% 1440

cache_mem 15000 MB
maximum_object_size_in_memory 1024000 KB
memory_replacement_policy heap GDSF
cache_replacement_policy heap LFUDA
minimum_object_size 1000 KB
maximum_object_size 100 MB
cache_dir ufs /var/squid/cache 50000 16 256
offline_mode off
cache_swap_low 80
cache_swap_high 90
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
acl allowed_subnets src x.x.x.x/8
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

Package Integration

url_rewrite_program /usr/local/bin/squidGuard -c /usr/local/etc/squidGuard/squidGuard.conf
url_rewrite_bypass off
url_rewrite_children 16 startup=8 idle=4 concurrency=0

Custom options before auth

ssl_bump peek step1
ssl_bump splice all

Setup allowed ACLs

Allow local network(s) on interface(s)

http_access allow allowed_subnets
http_access allow localnet

Default block all to be sure

http_access deny allsrc

==============================

I'm having intermittent slowness on HTTP and HTTPS….
sometime HTTPS couldn't load so I need to refresh it again...

here is result from
squidclient -h 127.0.0.1 -p 3128 mgr:info

HTTP/1.1 200 OK
Server: squid
Mime-Version: 1.0
Date: Mon, 22 Jan 2018 02:29:36 GMT
Content-Type: text/plain;charset=utf-8
Expires: Mon, 22 Jan 2018 02:29:36 GMT
Last-Modified: Mon, 22 Jan 2018 02:29:36 GMT
X-Cache: MISS from xxxxxxx
X-Cache-Lookup: MISS from xxxxxxxx:3128
Connection: close

Squid Object Cache: Version 3.5.27
Build Info:
Service Name: squid
Start Time: Fri, 19 Jan 2018 01:41:33 GMT
Current Time: Mon, 22 Jan 2018 02:29:36 GMT
Connection information for squid:
Number of clients accessing cache: 8658
Number of HTTP requests received: 6244979
Number of ICP messages received: 0
Number of ICP messages sent: 0
Number of queued ICP replies: 0
Number of HTCP messages received: 0
Number of HTCP messages sent: 0
Request failure ratio: 0.00
Average HTTP requests per minute since start: 1429.7
Average ICP messages per minute since start: 0.0
Select loop called: 295699390 times, 0.886 ms avg
Cache information for squid:
Hits as % of all requests: 5min: 0.1%, 60min: 0.1%
Hits as % of bytes sent: 5min: 31.2%, 60min: 29.6%
Memory hits as % of hit requests: 5min: 94.1%, 60min: 83.2%
Disk hits as % of hit requests: 5min: 0.0%, 60min: 3.8%
Storage Swap size: 40931384 KB
Storage Swap capacity: 79.9% used, 20.1% free
Storage Mem size: 12797904 KB
Storage Mem capacity: 83.3% used, 16.7% free
Mean Object Size: 11648.09 KB
Requests given to unlinkd: 1821
Median Service Times (seconds) 5 min 60 min:
HTTP Requests (All): 0.76407 0.64968
Cache Misses: 0.25890 0.22004
Cache Hits: 274.90301 28.47649
Near Hits: 0.00000 221.51346
Not-Modified Replies: 0.00000 0.08729
DNS Lookups: 0.07284 0.06083
ICP Queries: 0.00000 0.00000
Resource usage for squid:
UP Time: 262082.878 seconds
CPU Time: 57314.937 seconds
CPU Usage: 21.87%
CPU Usage, 5 minute avg: 100.00%
CPU Usage, 60 minute avg: 99.75%
Maximum Resident Size: 96936368 KB
Page faults with physical i/o: 46157
Memory accounted for:
Total accounted: 417220 KB
memPoolAlloc calls: 767721337
memPoolFree calls: 816550705
File descriptor usage for squid:
Maximum number of file descriptors: 942417
Largest file desc currently in use: 6763
Number of file desc currently in use: 5758
Files queued for open: 0
Available number of file descriptors: 936659
Reserved number of file descriptors: 100
Store Disk files open: 8
Internal Data Structures:
6225 StoreEntries
4183 StoreEntries with MemObjects
1519 Hot Object Cache Items
3514 on-disk objects

I have 56 core but I found only 1 CPU utilized by squid with 100% CPU persistently

seems that squid only single threaded...

but I read from https://doc.pfsense.org/index.php/Low_Throughput_Troubleshooting
saying that pfsense 2.2 or later already use multiple cores...

what I missed on my configuration....

last pid: 41316; load averages: 1.12, 1.20, 1.22 up 8+12:07:37 09:56:43
114 processes: 3 running, 111 sleeping
CPU: 1.7% user, 0.1% nice, 0.4% system, 0.1% interrupt, 97.6% idle
Mem: 10G Active, 7186M Inact, 11G Laundry, 2491M Wired, 1571M Buf, 513M Free
Swap: 4096M Total, 251M Used, 3845M Free, 6% Inuse

PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
13212 squid 1 103 0 23729M 22535M CPU46 46 982:21 100.59% squid
11539 root 1 52 0 261M 22536K accept 23 0:00 1.30% php-fpm
87784 root 1 52 20 13084K 2156K wait 35 1:55 0.26% sh
8091 root 1 20 0 12700K 1888K bpf 28 7:47 0.20% filterlog
1622 squid 1 20 0 34124K 14152K sbwait 22 0:17 0.18% squidGuard
9237 squid 1 20 0 34124K 14148K sbwait 1 0:16 0.15% squidGuard
11166 squid 1 20 0 34124K 14156K sbwait 17 0:10 0.15% squidGuard
15785 squid 1 20 0 34124K 14152K sbwait 54 0:09 0.15% squidGuard
44726 root 1 20 0 10484K 1984K select 51 3:37 0.10% syslogd
21613 root 1 20 0 20060K 3704K CPU33 33 0:00 0.08% top
16266 squid 1 20 0 34124K 14152K sbwait 4 0:07 0.07% squidGuard
87330 root 1 20 0 37712K 7044K kqread 2 0:32 0.07% nginx
22108 squid 1 20 0 34124K 14156K sbwait 12 0:06 0.05% squidGuard
22534 squid 1 20 0 34124K 14152K sbwait 53 0:05 0.04% squidGuard
61005 squid 1 20 0 33780K 3520K select 49 0:50 0.03% pinger
26037 squid 1 20 0 33780K 3512K select 30 0:47 0.02% pinger
36541 squid 1 20 0 33780K 3592K select 52 0:08 0.02% pinger
32991 squid 1 20 0 33780K 3512K select 36 0:48 0.02% pinger
8509 squid 1 20 0 33780K 3520K select 41 0:43 0.02% pinger
25623 squid 1 20 0 33780K 3512K select 33 0:50 0.02% pinger
66183 squid 1 20 0 33780K 2940K select 28 0:47 0.02% pinger
29798 squid 1 20 0 34124K 14148K sbwait 55 0:04 0.02% squidGuard
18928 squid 1 20 0 33780K 2940K select 31 0:45 0.02% pinger
51648 squid 1 20 0 33780K 3512K select 19 0:47 0.02% pinger
30062 squid 1 20 0 33780K 3852K select 20 0:03 0.02% pinger
62063 squid 1 20 0 33780K 3512K select 2 0:49 0.02% pinger
65590 squid 1 20 0 33780K 3512K select 22 0:49 0.02% pinger
42315 squid 1 20 0 34124K 14148K sbwait 17 0:04 0.02% squidGuard
80972 squid 1 20 0 33780K 3568K select 9 0:26 0.02% pinger
20730 squid 1 20 0 33780K 3520K select 3 0:47 0.02% pinger
75460 squid 1 20 0 33780K 2944K select 6 0:47 0.02% pinger
66930 root 5 52 0 13032K 2060K uwait 7 1:54 0.02% dpinger
89505 squid 1 20 0 33780K 2936K select 8 0:47 0.01% pinger
63016 squid 1 20 0 33780K 2944K select 21 0:48 0.01% pinger
28848 squid 1 20 0 33780K 2940K select 9 0:46 0.01% pinger
66070 root 5 52 0 13032K 2012K uwait 20 1:54 0.01% dpinger
66431 root 5 52 0 10984K 2016K uwait 20 1:55 0.01% dpinger
336 root 1 20 0 9560K 488K select 55 0:30 0.01% devd
88531 root 1 20 0 78844K 7128K select 38 0:00 0.01% sshd
25055 root 1 20 0 24612K 12432K select 10 0:34 0.00% ntpd
5913 root 1 20 0 43140K 5428K kqread 29 0:10 0.00% lighttpd_ls

Gertjan · Jan 22, 2018, 7:10 AM

Hi,

Why 56 cores ??

I miss something : is this squid related or not ? I mean, when you disable squid, the problem is solved - no more problems ??

I advise you to post and read here : pfSense Forum » pfSense English Support » Packages » Cache/Proxy

Note : not related but strange :

AES-NI CPU Crypto: Yes (inactive)

sqrobin · Jan 22, 2018, 7:35 AM

yes this is squid related as PFSense rely with squid to perform cache and filtering…

yes if squid turn off it will fix the issue...

now I turn off the HTTPS MITM... and CPU usage lower a bit... but still high.....

for the AES-NI CPU, i think its because my hardware support it but by configuration is not selected using AES-NI as I'm not yet in the phase using VPN...

sqrobin · Jan 22, 2018, 7:38 AM

Hi Gertjan

as Why 56 Cores…
as simple that I have the resource and I thought that I can limit it or change it later from VM....

Chrismallia · Jan 22, 2018, 11:36 AM

@sqrobin:

yes this is squid related as PFSense rely with squid to perform cache and filtering…

yes if squid turn off it will fix the issue...

now I turn off the HTTPS MITM... and CPU usage lower a bit... but still high.....

for the AES-NI CPU, i think its because my hardware support it but by configuration is not selected using AES-NI as I'm not yet in the phase using VPN...

MITM = Huge can of worms + many apps/devices are having hard certs so you can not use your own, if you want to filter I would try PfblockNG, As for caching with todays bigger pipes and dynamic content there is not much use for it

sqrobin · Jan 22, 2018, 11:54 AM

HI Chris,

Thanks for replying…

Could you please let me know why I should go with PfBlockNG rather than SquidGuard...

as I ready, PFBlockNG is used if I host mail server and this will prevent IP Block Country that is known as spammer to reach our server....

if I compare to SquidGuard, its different of purpose..... even though you can put the filter on the outbound from your internal LAN....

So, anyone can give me a clue as why I have almost 100% CPU utilisation persistently on 1 CPU rather then spread into multiple CPU?

CPU usage information on the Dashboard is useless as its represent to all CPU I have... since I have many.. then if 1 CPU is high the CPU Dashboard info doesn't tell me anything..

Chrismallia · Jan 22, 2018, 12:27 PM

PfblockerNG can use dns lists to block content that is far more efficient and far less problematic then squid and cos its using dns lists you do not need MITM, here is a great video

https://www.youtube.com/watch?v=QwFpMwXEK5w&t=1066s

Gertjan · Jan 22, 2018, 2:23 PM

@sqrobin:

So, anyone can give me a clue as why I have almost 100% CPU utilisation persistently on 1 CPU rather then spread into multiple CPU?
CPU usage information on the Dashboard is useless as its represent to all CPU I have… since I have many.. then if 1 CPU is high the CPU Dashboard info doesn't tell me anything..

Squid is a "pfSense package". The sub parts are the pfSEnse glue-ware to add the settings and the official squid FreeBSD package - or even one level higher : check out the manual -> (example) => https://wiki.squid-cache.org/MultipleInstances

agixdota · Apr 18, 2018, 12:56 AM

Hi Robin,

im using splice all, always taking much ram time to time.
do you have same issue with me?

SOLVED
im try all selected option on ssl proxy

for your problem Robin, try disable your refresh pattern.