A proxy is a program that acts as an intermediary in connections between a client and server. There can be proxies for any communication protocol: HTTP, SSH, …

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What tool can I use to sniff HTTP/HTTPS traffic?

I'm looking for a command line tool that can intercept HTTP/HTTPS requests, extract information such as: (content, destination, etc.), perform various analysis tasks, and finally determine if the ...
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77 views

Network connecting trouble shooting

I am trying to connect to the network of my school. With Windows 7 + IE it is not problem at all. I connect to it, no matter what web-page I try to reach, I get forwarded to ...
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243 views

Squid3 failed to response when access certain website

My Host system is Ubuntu 13.10 64bit. I configured Squid3 almost with the default configuration file, except adding acl localnet... and http_access allow localnet. I did not configure cache_dir cause ...
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4answers
162 views

Unset http_proxy enviroment variable

Updated 11/03: After doing some test with your suggestions, I only can be sure about one thing: there is something related to the graphical environment, because if I login through ssh or using ...
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197 views

Squid cache problem

If I put in my test_site acl (deny access policy) a site (i.e, www.aaabbbccc.com) which nobody ever accessed and do a squid -k reconfigure, Squid then appears to correctly log the site. I then ...
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1answer
228 views

Squid not forwarding my packets proxied from iptables on router

I am trying to make openwrt's iptables from my router to direct to my squid proxy on my machine (since there is no enough space in router's flash memory) but even if I have my squid config ok ( ...
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1answer
255 views

Tunnel HTTP traffic using another machine via SSH

I have this situation: server 1: public ip x.x.x.x private ip 192.168.0.1 server 2: private ip 192.168.0.10 The server 1 can reach the internet with both interfaces: ping -i x.x.x.x ...
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2answers
415 views

PXE boot via off-site TFTP server

I would like to PXE boot from a TFTP server that is not on my local network. The server is running in a cloud VM. Is it possible to specify the remote server's IP without utilizing DHCP? If not, ...
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votes
1answer
900 views

How do I deal with a certificate based transparent proxy in Arch Linux?

I have setup an Arch Linux VM at work, and my company uses a transparent (cut-through) proxy with a self-signed certificate and requires authentication. Whenever I try to install any packages through ...
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284 views

HTTPS Authentication problem : Polipo

I use internet behind http proxy, and that requires authentication. I tried using polipo to bypass the authenticated proxy to 127.0.0.1:9134. Applying these settings to my browser, works fine for ...
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1answer
2k views

Have ssh resolve hostnames from config when using ProxyCommand and netcat mode

I'm attempting to set up some universal options for bouncing ssh connections. Here is my ~/.ssh/config file, abbreviated: Host *%via ProxyCommand ssh gateway -W $(echo %h | cut -d%% -f1) %p Host ...
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1answer
203 views

Is it possible to use a VMWare VDI as a proxy for SSH?

I'm currently working for a company with quite strict security measures. 90% of my work takes place on a Linux machine, but to access this machine I first have to connect to a VPN, access a Windows ...
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1answer
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proxy settings ignored by apt-get manager in Ubuntu 13.04

I am using Ubuntu 13.04 in company network, http proxy works fine with my user account but still I cannot install or update anything with apt-get : Proxy Authentication Required ( Forefront TMG ...
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2answers
613 views

SCP file between 2 servers that go through few servers

I want to copy a file from server-a to server-d but I can access server-d only from server-b and then to server-c. server-a can only access server-b, server-b can only access server-c, server-c can ...
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3answers
3k views

How to change user agent on all http requests made from my machine with Squid intercepting proxy?

I'd like to change the user agent on all HTTP requests made from this machine. It's easy enough to change the user agent in each browser, but other apps also make http requests. It's vital I catch ...
0
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1answer
135 views

squid 3.1.11-1 - POST issues

I have an issue with my squid on the website : http://www.draw.io I have one schema and I am not able to export it as a PNG (I got a white page on the web browser like the website didn't answer.) ...
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1answer
620 views

How to set up a “child” proxy that doesn't need a “parent” proxy

I run Linux on a laptop that is sometimes on a corporate network which uses an NTLM proxy server, and thus I have cntlmd running on the laptop as a child proxy to connect to the parent (corporate) ...
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1answer
203 views

LAMP Hardening, Transparent Proxy with iptables

I'm running a LAMP server with FTP(S) and several users. The users have only access to uploading PHP files and other web content. Some are running Drupal and Wordpress, but also a few home made stuff. ...
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2answers
189 views

Mirror localhost:3280/some/long/url to localhost:3000

I have a webservice running on localhost 3280 that exposes Elasticsearch server under /some/long/url. I would like to access Elasticsearch from localhost's port 3000. Can I do this with ...
0
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1answer
295 views

SSH reverse tunnel works except when I use a VirtualBox instance at one end. Why does VB break SSH?

VirtualBox seems to break my SSH ProxyCommand... here are the details: I want to open an SSH connection from my laptop to desktop over an SSH (reverse) tunnel. I want to do that in one step using ...
2
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3answers
5k views

CentOS use .pac file as proxy

I have to use a proxy with authentication to connect to the Internet. But I can't find any solution for this. I have modify my yum.conf, with a lot of possibilities: ...
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1answer
48 views

how to setup: proxy with confirmation of rules for browsing internet

I'm trying to achieve something like acceptance of rules before user gets connected to the internet. For example: when users enters address http://google.com (or any other) first thing he will see is ...
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1answer
287 views

What are the key differences between “SSH tunnels” and “Squid reverse IPs” in regards to web page scraping and private browsing?

What are the key differences between "SSH tunnels" and "Squid reverse IPs" in regards to web page scraping and private browsing? Interested to know if there are any differences between using "SSH ...
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1answer
1k views

Why wget does not work via ssh tunnel? What does proxy prevent ssh-client to do?

To test things I'm trying to establish a local ssh tunnel from my laptop to a site via ssh-server, and download a page of the site (or view it in a browser). The tunnel is made like this: $ ssh -L ...
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1answer
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apt-get via ssh-tunnel if only port 22 is allowed

I have a server which has only access to the outer world via port 22 (for the use of ssh from the server to other computers). I want to install some packages via apt-get on this server. Can I achive ...
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1answer
1k views

Tunnel openwrt requests

I am pretty new to OpenWrt what I want to achieve is the following scenario: I have a socks5 proxy server running on a machine which is at work. From my home I wish to configure my router which is ...
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3answers
324 views

Commandline global proxy program?

I'm living in China, and lots of web service is not available or stable here like Github/Bitbucket/Imgur, When I'm using wget, git or some other commandline tools, I need using a proxy. Is there any ...
4
votes
1answer
576 views

tproxy per user

I'm in the process of adding some parental control to my box (http filtering), but I'm something of a nOOb when it comes to network configuration :-( The box is used by the whole family (one account ...
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1answer
1k views

TP-Link TL-WR1043ND as dumb access point

I followed these instructions on how to set up my TP-Link TL-WR1043ND as a dumb AP: Flashed brand new Attitude Adjustment 12.09-rc1 Logged into LuCI, set up a password Disabled and stopped firewall ...
2
votes
1answer
269 views

Http proxy to select external interface based on host header

I have a very specific use-case at work where I have several external IP addresses (a full class C), and I need to select the outbound IP address I'm using. The requests are http, and the application ...
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1answer
232 views

privoxy unable to take any additional connections

I run a public proxy and I've got about 400 clients, but when I check the logfile: /var/etc/privoxy/logfile I get lots of: unable to take any additional connections. In /etc/privoxy/config I ...
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1answer
99 views

privoxy show client ip when sending mail

Is it possible for privoxy to show original client ip when sending mail ( example: this mail header should show the client's ip not the proxy ip: Received: from [xx.xx.xx.xx] by ...
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1answer
365 views

PGP keyserver and proxy firewall issues

I am not sure this is a Linux question directly ... I use Arch Linux which uses package signing. This requires me to download a set of pgp keys with the pacman-key program. This works off the ...
3
votes
1answer
531 views

Configure Centos 6.3 to direct all traffic through a proxy server

Is there a way to configure CentOS 6.3 to direct all internet traffic through a proxy server? Forgive me if this is a really dumb question, I know very little about how proxy servers work and how ...
2
votes
0answers
371 views

How to bind ppp0 interface (PPTP VPN) as 'external' in proxy server?

I'm trying to bind ppp0 interface (PPTP VPN) as 'external' interface in proxy server (Tinyproxy). Unfortunately it does not work. Using route add -net default gw 10.9.0.1 I can make all the traffic ...
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votes
1answer
115 views

What do I need to setup a linux box as a proxy to access the network?

At the minute I have all my machines connect directly to my isp-supplied broadband router. I want to make sure my machines are behaving correctly so I wish to test this by sniffing the traffic of ...
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2answers
550 views

How to make my debian to work as http/html proxy?

I use debian on faculty server via putty having its public Ip adress. I have sudo. I wonder how to make it work as Http/html proxy for access to "web of science" from my home windows browser. I wonder ...
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vote
1answer
311 views

How can I configure dnsmasq to resolve based on the source of the request?

I'm trying to get SiriProxy to work whenever I'm connected to my home network by setting up dnsmasq on my router running the Tomato firmware to send all requests to the Apple Siri server to my local ...
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votes
4answers
8k views

Use socks proxy for commands in terminal

I connect to a remote ssh server by running this command: ssh -D 12345 bob@myserver.com This creates a socks proxy that I can use with Firefox to bypass censorship in my country. However, I can't ...
2
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0answers
341 views

Redirect all non-local traffic to a socks proxy

Is it possible to redirect all non-local traffic to a socks proxy? so, for example i have: 4 computers (clients A-D: 10.0.0.1-4 or dhcp) 1 computer with 2 network cards (gateway-server, eth0: ...
4
votes
2answers
12k views

How to configure for an Authenticating Proxy Server

My work proxy server requires authentication with the Microsoft AD domain user credentials. Everybody knows how it works: If you log in on a Windows workstation, your "Internet Explorer" browser based ...
3
votes
3answers
663 views

Linux stack for a home network firewall/proxy?

I've got a generic home 'network' where my ISP supplied modem acts as router with a software firewall built-in. My PCs connect directly to this router to access the Internet. I want to place a box in ...
2
votes
2answers
1k views

Connecting to host by SSH client in Linux by proxy

I am really struggling with this. My host (A) is behind a proxy/firewall (PF) and needs to connect to host H. The proxy has HTTP/FTP/SOCK proxy configured and I have no issue to configure in ...
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1answer
121 views

Self cache-proxying all outcoming http/https request

Is there a way to setup squid (or another caching proxies) to cache any http/https request from my own computer? i will use it to record all request and get the downloaded files from software that ...
4
votes
3answers
56k views

How to flush local DNS cache in CentOS

(I am aware that googling this question gives me tons of stuff, but literally none worked) I'm looking for a way to flush the local DNS cache on a Centos 6 system, it is not running any DNS server or ...
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360 views

problem with socks in proxychains

I'm trying to connect to a socks server using proxychains. My ProxyList part of proxychains.conf is: socks5 ip1.sockssrv.org 1080 MYUSER MYPASS When I try to use it; for example using ...
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2answers
77 views

How to resolve issue of system proxy?

I live in an institute where two proxies work. Lets say they are proxy A and proxy B. A works well for almost all websites, however my institution has blocked many of the essential sites in B using a ...
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1answer
270 views

How to allow access to web only through proxy?

I have a machine with Linux Slackware 13.37. Is it possible to configure iptables, so the users will be able to access web only through squid? The direct access through the browser will be blocked. ...
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1answer
2k views

Get transmission web interface working with web server

I have my working on default port and I want to be able to use the web interface with an URL like http://my.domain/torrents. I tried adding a location and a proxy conf to Nginx but it fail to work ...
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0answers
2k views

The right way for dynamic ssh port-forwarding

Want my Firefox could use localhost:9099 proxy forwarded from vps server, why it doesn't it work this way? I always get bind: Address already in use $ ssh -vfND 127.0.0.2:9099 vpn OpenSSH_5.9p1, ...