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<p class="MsoNormal">I am using squid 3.5 for windows as a transparent proxy to provide internet access to 7 servers in a secure environment that otherwise does not have internet access. I have two squids running behind a load balancer, each one is running
server 2016 core with 2 Xeon processors that is either haswell generation with 1:1 physical processor to virtual processor mapping or a hyper-threading Broadwell generation processor that is 1:1 logical processor to virtual processor mapping, depending on
how they are provisioned when they get started.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Doing a bandwidth test directly in the VM I am able to get internet throughput of 800-1200 Mbps.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Doing a file copy to and from the VM I am able to get 1200 Mbps lan throughput.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In proxied uploads I have observed speeds as high as 120 Mbps, which is more than enough for what I need and the bottleneck is likely in the backup software rather than squid. Uploads performance I am not worried about where they are at
now – even if I only got 20-30 Mbps it would be adequate for what I need it for.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Downloads however are very slow. Small files do not seem to be impacted. Using the test a thinkbroadband.com/download, files up to 20 Mb will download at a reasonable 20-30 Mbps, but when I get to 50, it slows down to about 17 Mbps, and
when I download AD Connect from Microsoft, which is about 80 Mb, I can see it start at about 30 Mbps, but eventually goes down to about 115 kbps and levels off. When I put an IP on the server I am using for testing that proxies through squid, I am able to
download the file at several hundred mbps. When I download the same file on the squid server – I can’t tell exactly what throughput I was getting, but the 80 Mb file downloaded within 5 seconds.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In both squid servers, other than when the servers were booting, processor activity has not exceeded 9% in the last 7 days but usually sits below 2%. Memory usage has not exceeded 2 Gb, leaving 2 Gb free.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am using OpenDNS for a DNS source, and have tried changing DNS to level3 but it made no performance difference.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I think that this may be squid trying to cache something, but had tried to turn all caching off.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My cache.log doesn’t really have anything interesting in it that I can see. It’s the same ~30 or so log entries each time the service starts, and that is about it. Here it is:
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Set Current Directory to /var/cache/squid<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Starting Squid Cache version 3.5.27 for x86_64-unknown-cygwin...<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Service Name: squid<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Process ID 1164<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Process Roles: worker<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| With 3200 file descriptors available<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Initializing IP Cache...<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| parseEtcHosts: /etc/hosts: (2) No such file or directory<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| DNS Socket created at [::], FD 5<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| DNS Socket created at 0.0.0.0, FD 6<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Adding nameserver 208.67.222.222 from squid.conf<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Adding nameserver 208.67.220.220 from squid.conf<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Logfile: opening log daemon:/var/log/squid/access.log<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Logfile Daemon: opening log /var/log/squid/access.log<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| WARNING: no_suid: setuid(0): (22) Invalid argument<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Store logging disabled<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Swap maxSize 0 + 262144 KB, estimated 20164 objects<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Target number of buckets: 1008<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Using 8192 Store buckets<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Max Mem size: 262144 KB<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Max Swap size: 0 KB<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Using Least Load store dir selection<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Set Current Directory to /var/cache/squid<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Finished loading MIME types and icons.<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| HTCP Disabled.<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Squid plugin modules loaded: 0<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Adaptation support is off.<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:27 kid1| Accepting HTTP Socket connections at local=[::]:3128 remote=[::] FD 10 flags=9<o:p></o:p></p>
<p class="MsoNormal">2018/03/22 09:47:28 kid1| storeLateRelease: released 0 objects<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And this is my squid.conf:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"># Recommended minimum configuration:<o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># Example rule allowing access from your local networks.<o:p></o:p></p>
<p class="MsoNormal"># Adapt to list your (internal) IP networks from where browsing<o:p></o:p></p>
<p class="MsoNormal"># should be allowed<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">#acl localnet src 10.0.0.0/8 # RFC1918 possible internal network<o:p></o:p></p>
<p class="MsoNormal">#acl localnet src 172.16.0.0/12 # RFC1918 possible internal network<o:p></o:p></p>
<p class="MsoNormal">#acl localnet src 192.168.0.0/16 # RFC1918 possible internal network<o:p></o:p></p>
<p class="MsoNormal">acl localnet src fc00::/7 # RFC 4193 local private network range<o:p></o:p></p>
<p class="MsoNormal">acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines<o:p></o:p></p>
<p class="MsoNormal">acl WSUS src 192.168.225.4/32<o:p></o:p></p>
<p class="MsoNormal">acl BACKUP src 192.168.225.11/32<o:p></o:p></p>
<p class="MsoNormal">acl ADFS src 192.168.224.7/32<o:p></o:p></p>
<p class="MsoNormal">acl ADFS src 192.168.228.8/32<o:p></o:p></p>
<p class="MsoNormal">acl DEVWEB src 192.168.226.6/32<o:p></o:p></p>
<p class="MsoNormal">acl UATWEB src 192.168.226.13/32<o:p></o:p></p>
<p class="MsoNormal">acl PRDWEB src 192.168.226.8/32<o:p></o:p></p>
<p class="MsoNormal">acl PRDWEB src 192.168.226.9/32<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">acl SSL_ports port 443<o:p></o:p></p>
<p class="MsoNormal">acl Safe_ports port 80 # http<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 21 # ftp<o:p></o:p></p>
<p class="MsoNormal">acl Safe_ports port 443 # https<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 70 # gopher<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 210 # wais<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 1025-65535 # unregistered ports<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 280 # http-mgmt<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 488 # gss-http<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 591 # filemaker<o:p></o:p></p>
<p class="MsoNormal">#acl Safe_ports port 777 # multiling http<o:p></o:p></p>
<p class="MsoNormal">acl CONNECT method CONNECT<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"># Recommended minimum Access Permission configuration:<o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># Only allow cachemgr access from localhost<o:p></o:p></p>
<p class="MsoNormal">#http_access allow localhost manager<o:p></o:p></p>
<p class="MsoNormal">#http_access deny manager<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># Deny requests to certain unsafe ports<o:p></o:p></p>
<p class="MsoNormal">http_access deny !Safe_ports<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># Deny CONNECT to other than secure SSL ports<o:p></o:p></p>
<p class="MsoNormal">http_access deny CONNECT !SSL_ports<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># We strongly recommend the following be uncommented to protect innocent<o:p></o:p></p>
<p class="MsoNormal"># web applications running on the proxy server who think the only<o:p></o:p></p>
<p class="MsoNormal"># one who can access services on "localhost" is a local user<o:p></o:p></p>
<p class="MsoNormal">#http_access deny to_localhost<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"># INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS<o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># Example rule allowing access from your local networks.<o:p></o:p></p>
<p class="MsoNormal"># Adapt localnet in the ACL section to list your (internal) IP networks<o:p></o:p></p>
<p class="MsoNormal"># from where browsing should be allowed<o:p></o:p></p>
<p class="MsoNormal">http_access allow localnet<o:p></o:p></p>
<p class="MsoNormal">http_access allow localhost<o:p></o:p></p>
<p class="MsoNormal">http_access allow WSUS<o:p></o:p></p>
<p class="MsoNormal">http_access allow ADFS<o:p></o:p></p>
<p class="MsoNormal">http_access allow BACKUP<o:p></o:p></p>
<p class="MsoNormal">http_access allow DEVWEB<o:p></o:p></p>
<p class="MsoNormal">http_access allow UATWEB<o:p></o:p></p>
<p class="MsoNormal">http_access allow PRDWEB<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># And finally deny all other access to this proxy<o:p></o:p></p>
<p class="MsoNormal">http_access deny all<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># Squid normally listens to port 3128<o:p></o:p></p>
<p class="MsoNormal">http_port 3128<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># Uncomment the line below to enable disk caching - path format is /cygdrive/<full path to cache folder>, i.e.<o:p></o:p></p>
<p class="MsoNormal">#cache_dir aufs /cygdrive/d/squid/cache 3000 16 256<o:p></o:p></p>
<p class="MsoNormal">cache deny all<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># Leave coredumps in the first cache dir<o:p></o:p></p>
<p class="MsoNormal">coredump_dir /var/cache/squid<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"># Add any of your own refresh_pattern entries above these.<o:p></o:p></p>
<p class="MsoNormal">refresh_pattern ^ftp: 1440 20% 10080<o:p></o:p></p>
<p class="MsoNormal">refresh_pattern ^gopher: 1440 0% 1440<o:p></o:p></p>
<p class="MsoNormal">refresh_pattern -i (/cgi-bin/|\?) 0 0% 0<o:p></o:p></p>
<p class="MsoNormal">refresh_pattern . 0 20% 4320<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">dns_nameservers 208.67.222.222 208.67.220.220<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">max_filedescriptors 3200<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does anyone see anything I am missing here?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My access.log doesn’t really have anything interesting in it either, it just looks like it is working normally. I can attach that too if anyone wants to look at it after I redact some of the hosts.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:#0072BE">Keith Hartley<o:p></o:p></span></b></p>
<p class="MsoNormal"><i>Network Engineer II<o:p></o:p></i></p>
<p class="MsoNormal"><i>MCSE: Productivity, MCSA: Server 2008, 2012, Office 365 </i>
|<o:p></o:p></p>
<p class="MsoNormal"><i>Certified Meraki Network Associate, Security+<o:p></o:p></i></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt">Geocent, LLC<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="color:#8BC541">o:</span></b><span style="color:#8BC541">
</span>504-405-3578<o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:#8BC541">a:</span></b><span style="color:#8BC541">
</span>2219 Lakeshore drive Ste 300, New Orleans, LA 70122<o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:#8BC541">w:</span></b><span style="color:#8BC541">
</span><a href="http://www.geocent.com/"><span style="color:#0563C1">www.geocent.com</span></a>|<b><span style="color:#8BC541"> e:</span></b><span style="color:#8BC541">
</span><a href="mailto:khartley@geocent.com"><span style="color:#0563C1">khartley@geocent.com</span></a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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