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Special Forums IP Networking Proxy Server Squid parent Selection Algorithm Post 302947093 by brusell on Monday 15th of June 2015 11:12:11 AM
Old 06-15-2015
Squid parent Selection Algorithm

Hello guys,
I have one question regarding choosing proper peer Selection Algorithm. Actually we have six Squid (2.7) servers with two parent upstream proxies running on two web appliances. In appliance statistics we see that balancing is not optimal and first appliance is keeping the majority of load.

Currently configuration on all Squids looks like:
Code:
cache_peer parent1 parent 80 0 no-query no-digest no-netdb-exchange userhash sourcehash round-robin
cache_peer parent2 parent 80 0 no-query no-digest no-netdb-exchange userhash sourcehash round-robin

My question is how exactly Squid is acting when there is defined more algorithms of Peer Selection (in this case userhash sourcehash round-robin) and how it will behave in case that there are define only two upstream proxies?
Just note that before all six proxies is network balancer which is masking source IP of client so sourcehash seems to be for me as nonsense since source IP is the same every time. User name is visible for proxies so userhash is feasible solution but not sure how much is optimal in case just two parent proxies.

Many thanks for sharing your opinions.
 

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proxychains(1)															    proxychains(1)

NAME
ProxyChains - redirect connections through proxy servers SYNTAX
proxychains <program> DESCRIPTION
This program forces any tcp connection made by any given tcp client to follow through proxy (or proxy chain). It is a kind of proxifier. It acts like sockscap / premeo / eborder driver (intercepts TCP calls). This version (2.0) supports SOCKS4, SOCKS5 and HTTP CONNECT proxy servers. Auth-types: socks - "user/pass" , http - "basic". When to use it ? 1) When the only way to get "outside" from your LAN is through proxy server. 2) When you are behind restrictive firewall which filters outgoing connections to some ports. 3) When you want to use two (or more) proxies in chain: like: your_host <--> proxy1 <--> proxy2 <--> target_host 4) When you want to "proxify" some programs with no proxy support built-in (like telnet). 5) When you dont want to pay for eBorder / premeo socks driver :) Some cool features: * This program can mix different proxy types in the same chain like: your_host <-->socks5 <--> http <--> socks4 <--> http <--> target_host * Different chaining options supported like: take random proxy from the list. or : chain proxies in exact order or : chain proxies in dynamic order (smart exclude dead proxies from chain) *You can use it with any TCP client application, even network scanners. yes, yes - you can make portscan via proxy (or chained proxies) for example with Nmap scanner by fyodor (www.insecure.org/nmap). proxychains nmap -sT -PO -p 80 -iR (find some webservers through proxy) NOTE: to run suid/sgid programs(like ssh) through proxychains you have to be root FILES
proxychains looks for config file in following order: ./proxychains.conf $(HOME)/.proxychains/proxychains.conf /etc/proxychains.conf see more in /etc/proxychains.conf EXAMPLES
To run this program the standard way type: proxychains telnet targethost.com in this example it will run telnet through proxy(or chained proxies) specified by proxychains.conf COPYING
proxychains is distributed under the GNU General Public License. (GPL 2.0 or greater). AUTHORS
Net Creature, Proxy Labs <http://proxychains.sourceforge.net> <Net Creature> 2.0 proxychains(1)
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