0
votes
0answers
26 views

TFS Check In Issue: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server

I've recently started seeing the below error when attempting to check in code to TFS: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server. ...
-2
votes
1answer
55 views

Email system architecture and implementation [closed]

It's been over a week already and I am unable to find satisfactory solutions to my problem on the Internet. I hope the experts here could lend a helping hand. I will just go straight on describing the ...
0
votes
2answers
68 views

Websocket & HTTP proxy with server between two firewalls

I have a server ("A") running behind a firewall, which serves HTTP and websockets. I have no control over the firewall, but do have an external server ("B") to which the internal server can connect ...
1
vote
0answers
100 views

ClearOS Proxy - Block all traffic but two sites and 3 DMZ ips

I've been trying to two days now to get ClearOS to do a proxy setup for my network. This is what I need to do: I need to block all outgoing traffic no matter what it is, all ports and HTTPS as well ...
-1
votes
1answer
60 views

SSH through another machine at work to an external server [duplicate]

I'm fairly sure this will have been asked before, I have found similar questions but I do not fully understand how to apply them to my situation. So, sorry for asking again. We have a number of ...
0
votes
1answer
177 views

How to make an existing caching Nginx proxy use another proxy to bypass a firewall?

My question is about using Nginx as a proxy behind another proxy. (Somewhat confusing.) I want to set up Nginx so it acts as a caching proxy server to an npm mirror. Here is the link: ...
2
votes
1answer
45 views

Allow only one ipaddress through a cisco firewall without pcs knowing there is a proxy server

We have a PC behind a firewall. (ASA 5505) [PC] => [ASA Firewall] => [Corporate Proxy/Firewall/Anything] => [Internet] :- where the PC and ASA Firewall are under our control... and the rest are ...
0
votes
0answers
42 views

Securing and loadbalancing front-end back-end with sql inspection proxy

I am working on designing a secure way for our network to allow front-end application servers in our DMZ to communicate securely with our databases, and I can see quite clearly that normal firewalling ...
1
vote
0answers
180 views

Bypassing a transparent proxy using squid [closed]

I'm in a network where I can reach only one website for example exemple.com. Other requested web sites like google.com will be redirected to exemple.com, all other ports are work this way too ( in ...
1
vote
2answers
726 views

force LAN hosts to go through proxy

I have an IPTables firewall on a Debian server, with a bunch of hosts behind it with masquerading. In the upstream network I don't have direct access to the internet, and I need to go through a proxy ...
0
votes
0answers
86 views

Linux set routing based on MAC address + failover

In my company we have a relatively small network. Than we have 2 different WAN (via ADSL and SHDSL) connection behind 2 different hardware firewalls (Zyxel and SonicWall). Those are connected to our ...
-2
votes
1answer
59 views

Setting up a DHCP/Proxy Server

Current setup: Modem -> Firewall(DHCP) -> Switch and Wireless Router |-> Computers If I wanted to setup a Proxy Server in there, it would have to replace the Firewall correct? The idea is so that ...
1
vote
0answers
427 views

Local transparent proxy with ipfw and squid

I want to use a local transparent proxy to have a single place to enter the password to an office proxy. Basically, all the TCP packets sent to port 80 except the ones sent to specific subnet should ...
3
votes
6answers
2k views

Force clients to use proxy

Here's my network configuration: The proxy server is running Ubuntu with Squid on port 3128 and DansGuardian on port 8080. I'd like to force all clients to use the proxy server - specifically, ...
1
vote
2answers
478 views

Configure Cntlm to use no proxy if none are available

I am behind a corporate firewall in the day, and on an open internet connection at night. I have configured cntlm to forward to my corporate proxy, but when I connect from an open connection, I must ...
0
votes
1answer
47 views

External Client should use our proxy to get filtered by our firewall

I would like an external client (4.3.2.1) to use our proxy (9.9.9.9) which forwards traffic to our firewall (8.8.8.8) which then forwards the traffic back to our client (4.3.2.1). So I'm curious if: ...
3
votes
1answer
434 views

Blocking Google Analytics breaks some applications

We block Google Analytics (corporate policy). We have a few 3rd party Windows applications that ping Google Analytics when users sign-in, or when help is opened. Unfortunately since we are blocking ...
1
vote
2answers
2k views

ADFS 2.0 Proxy Server Vs. Opening ADFS Server to public

We are working on deploying ADFS for SSO with o365. We have a consulting firm that handles our firewall configuration. Today, while attempting to get them to set up a DMZ for me to install my ADFS ...
1
vote
2answers
96 views

Default web page for no proxy setup

do you think it is possible to configure the net firewall or proxy or the webserver to redirect every http request (not from proxy server) to a static web page that tells the user how to configure his ...
-2
votes
1answer
201 views

How does a proxy server forward reply to the client?

A proxy maintains anonymity, i.e. the server replies to the proxy thinking that it is the client. now after receiving the reply fro the server, how does the proxy server forward the reply to the ...
0
votes
0answers
806 views

MIKROTIK: Open port 110

I have a mikrotik web proxy with firewall and hotspot. I'm able to open major part of TCP (e.g. 25) port but not the port 110 for TCP. What is the difference? How can I open the port on firewall ...
0
votes
1answer
434 views

SQUID proxy + iptables

I'm using squid3 (on ubuntu 10.10) and it manage connection completelly fine. But how can I secure the traffic by setting the firewall on the *same serve*r? If I use firewalls like ufw or ...
0
votes
1answer
622 views

linux yum through a socks v5 proxy

I can't use yum because port 80,443 are being blocked by a firewall. I setup a ssh proxy tunnel (socks v5), it works fine. I've tried to find how to use yum with a socks v5, but looks like it only ...
2
votes
2answers
244 views

Rate limiting (cutting off) if exceed n connections per minute

What do you suggest I use to rate limit incoming http connections (get/post) based on n connections per minute? If a particular client makes more than n connections in a given minute, drop all ...
4
votes
3answers
1k views

SSH from A through B to C, using private key on B

I'm looking for a simple way to SSH from my local machine, A, through a proxy, B, to a destination host, C. The private key that goes with the public key on C is on B, and I can't put that key on my ...
3
votes
3answers
154 views

Internet safety to protect children on a small network

I support a local organisation which works with school children. The organisation has 15 Vista and Windows 7 desktops, all joined to the same workgroup. All the computers simply connect to a wireless ...
-2
votes
1answer
147 views

Why we need Socks Proxy? [closed]

Is there any specific reason for customers to choose SOCKS proxy when compared to HTTP Proxy?
2
votes
2answers
916 views

Using RRAS to bridge two networks

I have the following setup: Server A has two NIC's - one connected to each switch. Server B just has a NIC connected to the internal switch. Server A and Server B can both ping each other. But ...
0
votes
2answers
124 views

Mysql proxying and port mapping

Hi I have something silly like idea to proxying mysql connections. I have upload an image of my concept to here http://i52.tinypic.com/o7src3.png There is a single machine on local network running ...
0
votes
0answers
114 views

Restrictive network firewalls, proxies, and SSL

Our app interfaces with our web server using the HTTP components of WinINet, and in the past, we've had issues with this on certain corporate networks. For example, I couldn't append additional HTTP ...
1
vote
4answers
880 views

How can i make settings in router to block certain websites during office hours?

My company wants to restrict access to some websites during office hours. How this can be achieved using Router or any other technique?
-1
votes
3answers
1k views

how to block Ultra surf on checkpoint or smoothwall firewall

i'm trying to block this since i've already blocked port80 and 8080 in my firewall, still the user are able to access the web
0
votes
1answer
121 views

What filtering system is blocking my users?

For automatic updates to an application I maintain, I have the app access a particular URL on our website, but I noticed from some logs that some users get some HTML instead, that begins with: ...
1
vote
1answer
176 views

Network components responsible for blocking or interfering with long URLs

UPDATE: While we were working on this problem, we realized that HTTPS traffic does not suffer from the "long url" problem (unless, of course, you have an exceptionally long domain name). This ...
0
votes
2answers
396 views

block yahoo messsenger

blocking yahoo messenger based on The order in which Yahoo Messenger scans for available ports is: 1. port 5050 2. port 80 3. All available ports is impossible,"its better disconnect ...
1
vote
1answer
473 views

Transparent proxy and IPTABLES

I am using PRIVOXY as a transparent proxy on a Fedora Core 11 box. The machine has one interface (eth0) and here is the configuration of the network: 10.0.1.1 - router.foobar.com (connected to ISP) ...
0
votes
2answers
425 views

Firewall issue with multiple SIP PROXY / REGISTRAR servers

We have a pair of Internet-facing SIP PROXY/REGISTRAR servers (for resilienced and load-balancing). When a SIP phone registers, it will be handled by one of the REGISTRAR servers (round-robin DNS) - ...
0
votes
2answers
814 views

Force all outbound HTTP connections through a proxy

We run a few society websites behind a University firewall that mandates that all traffic goes through an internal squid cache / proxy. While export http_proxy= works perfectly in the shell I'm ...
1
vote
5answers
2k views

Is SmoothWall a good firewall alternative?

I found this linux distribution, called SmoothWall. I read its documentation and it looks pretty for me. The only problem is, that I'm not a big linux professional and I have also not a lot of ...
1
vote
2answers
129 views

Is it possible to have an external server within a company's firewall?

I am sure this is server admin 101, but I am unsure of the answer and would love some help. I am a software developer I have built an application for a client and am currently hosting it successfully ...
1
vote
1answer
83 views

Tunneling HTTP traffic from a particular host/port

I'm trying to figure out how to access from my development machine (Devel) to a third party web service (www.domain.com) which I am not allowed to directly contact using my office IP address. Here's ...
2
votes
4answers
587 views

How to browse to a webserver which is reachable through the SSH port only

I have a server at work which is behind a firewall (the company's firewall) so it is reachable only thrugh port 22 (SSH). I'm able to connect to the server with putty without problems. Also, that ...
0
votes
2answers
120 views

Changing Internet connection on ISA Server 2000

We are getting a new internet connection installed and will need to unplug the old one and connect this to our ISA Server 2000. Will this be a simple swap out job? We will be given a new ip, which i ...
3
votes
2answers
1k views

setup ssh server and http server both on port 80

I have a web daemon (listening on port 80 and 443) and a ssh daemon (listening on port 22) on the same machine. I have a client (generating HTTP,HTTPS,SSH traffic) seating behind a proxy server (port ...
0
votes
4answers
1k views

iptables secure squid proxy

I have a setup where my incoming internet connection feeds into a squid proxy/caching server, and from there into my local wireless router. On the wan side of the proxy server, I have eth0 with ...
1
vote
3answers
1k views

tunnel over https proxy server (client-server model)

I need to get reliable Internet connection behind a restrictive firewall. facts: firewall handless HTTP CONNECT to anywhere as long as it goes to destination port 443 I have some servers publicly ...
2
votes
13answers
7k views

What free options are available for web content filtering? [closed]

I run the IT Dept at a small high school with about 500 users on the network. We have been using SurfControl for this which has been handy because it backs into MS ActiveDirectory very well. We ...
3
votes
2answers
122 views

Proxied access for chinese users?

I'm working on a web app that will have a large-ish chunk of users in China. The bad news is that most of them are university students, and access has been blocked. Setting up a proxy server inside ...
3
votes
3answers
390 views

Transparent proxy to enforce terms of service

There are lots of programs that small businesses (libraries, internet cafes, etc) can install on local computers to enforce their rules and terms of service when using free resources. These aren't ...
2
votes
9answers
276 views

How can we alleviate security concerns when adding internet-connected 3rd party Windows CE devices to a network?

My company makes devices that run Windows CE and must connect to our website through a customer's internet connection. We sell these devices to all sorts of customers with a multitude of network ...