Ubuntu Networking :: Http Proxies Has Blocked / How To Works Around

Jul 2, 2011

Recently My ISP provider blocked any kind of http proxies can be used in browsers. When I put my proxy settings in my browser, it keeps loading with no response. I've squid proxy running on my own server and worked fine before that modification.

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Fedora :: Cannot Test Proxies, Or Remote File Availability Without Both HTTP::Request:ommon And LWP::UserAgent

Mar 30, 2010

I am trying to istall litb for P2020DS. I got an error the following error:

[hwtesting@HWLSRV1 ~]$ cd /home/hwtesting/ltib-p2020ds-20091119
[hwtesting@HWLSRV1 ltib-p2020ds-20091119]$ ./ltib
Don't have HTTP::Request:ommon
Don't have LWP::UserAgent
Cannot test proxies, or remote file availability without both
HTTP::Request:ommon and LWP::UserAgent

add folowwing line to User Privilage section:

hwtesting ALL = NOPASSWD: /bin/rpm, /opt/freescale/ltib/usr/bin/rpmvisudo

I edit the sudoers by visudo command and insert this line just under the following line:

root ALL = (ALL) All

But still I am getting the following:

Don't have HTTP::Request:ommon
Don't have LWP::UserAgent
Cannot test proxies, or remote file availability without both
HTTP::Request:ommon and LWP::UserAgent

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Networking :: Ping And FTP Connection Works But No HTTP?

Feb 6, 2010

My problem is the following:I can only connect to the internet and download through the FTP, but not through HTTP.I am in a hospital at this moment and have a netbook (Lemote Yeelong). Also there is a computer here with internet access.I would like to access the internet by using the cable from the computer.I configured my netbook just like the local computer (same host name, same MAC address, DHCP), just to be sure.I can ping google.com and I also can download from ftp.debian.org though ftp.However, when I try to connect to google.com through epiphany, it just loads and loads without success

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Networking :: Speedport W503v C And MANDRIVA2009.1 - Http Works - Ssh Not

Jan 23, 2010

Objective: access from internet to http and ssh service on LINUX PC with MANDRIVA2009.1 OS in small home net.

Home net: Telekom DSL router w503v version C with direct connections to WindowsXP system, MANDRIVA2009.1 system and Dlink wlan access point. wlan of w503v not active.

MANDRIVA PC has running ssh and http servive, working well in intranet, using fixed IP addresses in same area as w503v (192.168.2.xx).

Did several trials to enable access to MANDRIVA PC from outside via DSL router. Last trial is as follows:

1) http forwarding (Weitereitung) on port 80 to proper 192.168.2.xx

2) ssh redirection (Umleitung) on port 24 to same IP address.

Here it should be noted that http is using predefined web-server in the router and that "ssh" is specified in an empty input box (offer is only second web-server).

For DNS the DynDNS support is successfully applied with manual adjustment of provider IP address.

Result:
- In intranet, i.e. clients with IP address 192.168.2.xx both http and ssh work with resolved DynDNS name.
- In internet http works without observed problems, shh is not responding on port 24. Also ping does not work.

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General :: Outbound Http Connections Blocked

Nov 21, 2010

(centos 5.5 86*64 with cpanel) I am trying to set up a php script.

The script requires an outbound connection to project honeypot and when I go to the honeypot.php on my server I get an error asking if outbound connections are disabled.

They could be...I am not sure where to check, I have checked csf and outbound tcp is allowed on port 80, but I am not sure if I should be looking somewhere else.

Obviously I dont want to make the server insecure, so I am wondering how I can allow this outbound connection.

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Ubuntu Networking :: Finding A Software Which Search+test Proxies

Feb 15, 2010

There's such thing for Ubuntu too?A software which search+test proxies... that's all I do need

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Networking :: Gnome Network Manager - Multiple Proxies?

Feb 11, 2010

Is it possible to define multiple proxies in NM and switch between them?

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Ubuntu :: Https Works - Http Doesn't ?

Sep 7, 2010

I have my Linux laptop running Katatonic Koala at the moment. It is connected via CAT5 to a switch. The switch then connects to my router. All five of my computers are connected to the switch, actually. The only one that won't talk to any sites other than https secure sites is the Linux box. I am not well-versed in the inner workings of Linux and need some help in what I need to do so that regular http sites work. You guys always have the right anwers so I will wait humbly for your replies.

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Networking :: Craft A Valid Http/1.1 Request For Getting Http Headers (not The Html File Itself)

Sep 27, 2010

Using netcat, nc(1), craft a valid http/1.1 request for getting http headers (not the html file itself!) for the main index page of www dot aalto dot fi. What request method did you use? Which headers did you need to send to the server? What was the status code for the request? Which headers did the server return? Explain the purpose of each header.

nc -v www dot aalto dot fi 8080
HEAD / HTML/1.1
host: www dot aalto dot fi
And it returns:
200 OK
Content-Length: 858
Content-Type: text/html
Last-Modified: Thu, 02 Sep 2010 12:46:01 GMT
[Code]....

I really don't know what does it mean. Question 2: Using netcat, nc(1), start a bogus web server listening on the loopback interface port 8080. Verify with netstat(, that the server really is listening where it should be. Direct your browser to the bogus server and capture the User-Agent: header "Direct your browser to the bogus server and capture the User-Agent: header" I don't understand this question.

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General :: HTTPS Works - But HTTP Does Not?

May 9, 2011

I had setup an SSL secure server awhile back, such that: [url] works but [url]does not (note the different: in the first, I use HTTPS, whereas the second I use HTTP) How can I get both to co-exist?

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Fedora Servers :: Apache - Can't Acces Http Remotely But Https Works

Jan 17, 2010

I have 2 web server in my office : http and https. You will find attached the httpd.conf and ssl.conf. I can acces the https server from home, but not the http one.

What I did :
configure the router to forward port 80 to my fedora 11 machine
open port 80 with system-config-network
created a virtualhost

The same exact steps have been done for port 443

I can access both server locally but only the https server remotelly.

Here are my iptables :

Code:

you can try to acces my servers using [url]

I made httpd to listen to port 8080, and done all the port forwarding/opening stuf, and it works. so is it a bug ?

Finally found my error seams like turning off UseCanonicalName to off did the trick

I really think it's a bug now. It was definitively working last week, I just added content to the main host of my website, and now i can't acces it from port 80. If someone think it's not a bug or find someting missing/wrong in my conf file.

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Ubuntu Networking :: Somehow Port 80 Is Being Blocked?

Apr 27, 2010

So I set up an Ubuntu 10.04 server with apache2 installed, but for some reason I can't get to it from my browser. the iptables have all changed directories in 10.04 so I can't find the iptables. Apparmor wasn't the problem. The network hard ware is not the problem.There is something inside of 10.04 that is blocking port 80. I can ping it all day using the ip address but when I ping it useing http://ipaddress it can't find the host

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Ubuntu Networking :: All Ports Appear To Be Blocked?

Jun 12, 2010

I dont know how, but somehow all the ports on my comp appear to be blocked except for 24, for ssh and 5900 unknown. I can connect to the network, but as far as I can tell, I'm powerless to do anything. No webpages load, I'm typing this on my phone.

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Networking :: Internet Blocked In Ubuntu 9.04?

Jul 15, 2010

In my Ubuntu 9.04 installation, just a few days ago, I lost my usage of the internet. I still had internet access. Firstly though, there was a problem with the router, so I tried a friend's router (both Netgear DG834) and the friend's one worked. But in Ubuntu, I could not access any web pages or email. Skype works.

I tried using my netbook and that could access web pages okay. So then I booted my main PC into the old installation that I kept there of Ubuntu 8.04, which I am using now. And in this the internet works just fine, I can access websites and download and send email.

But in Ubuntu 9.04, it seems like something is blocking my access. I do not recall installing anything new, although something may have been updated recently. I can see the DNS servers from Ubuntu 9.04 and it gets an IP address from the router. What is the likely cause of the Internet being blocked for websites and email (but not Skype)?

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Ubuntu :: Proxy Settings For Chromium / Use Different Proxies In The Two Places?

Jul 29, 2010

I have recently installed chromium in my ubuntu 10.04.

I am facing a problem. Chromium always takes the system proxy settings, and if I change the settings for chromium then system settings change too..

I want to use different proxies in the two places.

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Ubuntu Networking :: XRDP Being Blocked By Firestarter?

Dec 8, 2010

I recently installed the XRDP server on my desktop edition of Ubuntu v10.04 following the simple instructions available here. I did this on two computers. One computer has Firestarter installed while the other does not.

When I use Windows to connect to the Ubuntu box without Firestarter, everything works just fine. However, when I try to connect to the one running Firestarter, I get a pop up showing an error message (see the attached file).

I checked the incoming rules in Firestarter and I don't see a way to add RDP sessions to the list of exceptions. I also tried adding my IP address in the host section but this too didn't help the situation.

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Ubuntu Security :: Is It Safe To Use Apt-get Trough Untrusted Proxies/mirrors?

Jul 10, 2010

What if someone tampered with some important security updates, and suddenly you get a rootkit instead?

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Ubuntu Networking :: Port 21 Is Blocked? Can't Connect With GFTP

Sep 18, 2010

I can't seem to establish a conncction to my site (that I'm hosting in the same computer as the gFTP client- running Lucid Lynx desktop as a server). My site is 'out there', with a domain etc. and also I work on it with localhost. I wanted to use ftp as Joomla has a 'ftp layer' for files permissions etc. But it keeps saying that I can't connect, or the connection 'was reset by a peer' whatever that means. For 'hostname' I use site.com (site is my site's name) and even tried the whole thing like http://www.site.com (I clicke on 'connect to remote, and enter that in the url). or just put it where 'host' goes (when I'm not using localhost) For user name and pass, I just enter what I usually put to access the administrator's back panel in joomla, but maybe I am supposed to use what I use to log on to ubuntu when I start my computer? note sure. Anyway I used a telnet command in the terminal and found that port 21 was blocked. MY isp says they don't block any ports so I don't know. I was able to do this last year so I don't know what is so hard about this lol In the router, I have 'ftp 21 to 21 and ip address 192.168.1.100 (ip is the same for http which is working as I have my site up) now it seems to be open as I used a command at the terminal (found from google). It's open but my ftp still can't connect to my server either localhost or to my site. there is no firewall blocking it and I think my router is set right.

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Ubuntu Networking :: Linux Blocked On University Network

Feb 13, 2011

I am facing an annoying problem with the wireless network of my university.The network is open, doesnt have wpa/wep, and once connected when requesting any page in the browser it gets redirected to a login page. Basically any pc running windows works fine, however if the os is linux-based than the pc connects just fine, it gets an ip, but the login page never loads. I have tried several browsers, several machines, even my android smartphone is locked out as well as all my friends running ubuntu, arch linux and others linux distros.The technical support never answered my email, and it's now 3 weeks that we are all without internet.

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CentOS 5 Networking :: All Ports Blocked Except 22 And 80

Mar 2, 2011

All ports are blocked only 22 and 80 are open. I scan localhost and ports are open. When I scan IP address ports are blocked.I have no firewall rules.

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Server :: Fun With Apache Rewrites Proxies And Trailing Slashes?

Mar 26, 2010

I have a back-end server behind a proxy machine. I would like non-SSL requests to the proxy to be rewritten into HTTPS requests to the back-end server, while not screwing up URLs with missing or misplaced trailing URL slashes. So far, on the proxy side, I have this in a virtual host for port 80:

Code:
ReWriteEngine On
# trailing slash fix:
RewriteCond %{SERVER_NAME} my.proxy.com$ [NC]
RewriteCond %{REQUEST_FILENAME} -d

[Code]...

But adding anything else to the URL fails, as the back-end server name gets stuck into the proxied [URL]... The rewrite log seems okay, I think. So I guess this is failing at the reverse proxy rule? Where am I going wrong?

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Fedora Networking :: UPnP Blocked By 12 Firewall?

Nov 28, 2009

The firewall in Fedora 12 seems to block UPnP by default, but opening port 1900 for UDP, as I have seen suggestedes not resolve the problem.have the following three scenarios:Firewall Enabled: Transmission cannot open a port by UPnPFirewall Enabled (1900 UDP allowed): Transmission cannot open a port by UPnPFirewall Disabled: Transmission opens a port via UPnP fineAny ideas? Yes, the port that I'm trying to open is also allowed. Router is a Linksys BEFSR41 v4.3, should you care

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Fedora Networking :: NetworkManager Blocked By SELinux?

Feb 15, 2011

Fedora 13 64. NetworkManager tries to unlink /etc/hosts and is blocked:

Code:
SELinux is preventing /usr/sbin/NetworkManager from unlink access on the file /etc/hosts.
Additional Information:

[code]....

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Networking :: Https Blocked By Squid / Iptables

Nov 29, 2010

I connect to the internet at work through an authenticating proxy, and to avoid having to enter the proxy info into every app I use (e.g. firefox, wget, kde, etc) I have set up squid as a local transparent proxy which authenticates and routes all traffic to the work proxy. It has been working fine, but lately I haven't been able to connect to any https sites. I don't think I have changed the configuration, so perhaps it is the result of an upgrade, or something badly configured on my system from the start. I have tried connecting to https sites without squid and iptables and it works fine. My system is Arch linux, and my squid.conf file is: Code:

acl all src all
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
acl Safe_ports port 80# http
acl Safe_ports port 21# ftp
acl Safe_ports port 443# https
[Code]....

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Networking :: SSH Connection Blocked By Symantech Gateway

Oct 13, 2010

In my work I am trying to connect my home server behind symantech gateway but I cannot but when I try to connect with telnet to ssh port I can make connection.How can I connect my server via ssh client.

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CentOS 5 Networking :: Port 25 Blocked Since Updates?

May 17, 2010

Last night I installed all the updates that were available for CentOS. Today, I discovered that all connections to port 25 (Sendmail) are being blocked except connections coming from localhost.

I tried disabling the firewall to see if anything would change but it is still blocked.

If it is not the firewall doing the blocking, what else might it be?

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CentOS 5 Networking :: Port Open - Should Be Blocked

Jul 10, 2011

Recently I discovered that we were accidentally running a POP server (port 110), when we only should have been running the encrypted version thereof (port 995). This wouldn't have been a problem if the port was blocked in the first place.Isn't the default iptables setup on CentOS to block unspecified ports? Specifically, this line from /etc/sysconfig/iptables

-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited

Right? Well, this doesn't seem to be working for me. I added some rules to allow additional ports and commented out a couple (crucially port 110), but for some reason, port 110 is open.Here is /etc/sysconfig/iptables and the output of iptables -L below that:

# cat /etc/sysconfig/iptables
# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]

[code]....

Why isn't "-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited" doing what I think it should be doing?

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Ubuntu Servers :: Nagios On 10.04 Server Using Apt-get - HTTP WARNING: HTTP/1.1 404 Not Found

Aug 4, 2010

I installed Nagios on my Ubuntu 10.04 server using apt-get and when I accessed the web console, everything was OK. I made some changes to apache (creating some new virtual sites) and since then Nagios gives me a warning message for HTTP with the message, HTTP WARNING: HTTP/1.1 404 Not Found. The sites that I created are working perfectly. I noticed that the attemps are 4/4. Does this need to be reset or does Nagios automatically reset that once it detects the issue is resolved?

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Ubuntu Networking :: Access Blocked Sites By VPN And Unblocked By Direct ADSL?

Nov 21, 2010

I am in China, where some web sites(....., facebook, etc) are blocked. So I have to access these blocked site by VPN. But how can I access blocked sites by VPN and unblocked sites by my direct ADSL?

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Ubuntu Networking :: Cannot Access Certain Ports Via Web Browser, Outgoing Port Blocked

Aug 12, 2011

I have a vps server running certain services which can be accessed via a web browser (e.g webmin control panel), but I have recently been unable to access these services from my home machine using Firefox 5.0, running ubuntu 11.04.

Example:

I can access the server on port 80 fine, eg: [URL]

However I cannot access my webmin control panel on: [URL]

The pages takes ages to load and then times out. Same with transmission-daemon on: [URL]

Everything is set up fine on my server, the ports are open in firewall etc. and I can access these pages fine from my work computer.

This has only started happening in the last day or two and had been working fine up till then. I have not messed around at all with the firewall on my home machine. I have tried other browsers besides Firefox with same result.

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