General :: Blocking Countries From Accessing Server?
Jun 3, 2010How can I block certain countries from accessing my server in any capacity? Is this possible? What do I need to add to my /etc/hosts.deny for this?
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Ubuntu Networking :: Network Provider Blocking PC's From Accessing Web?
Feb 21, 2011Today I have tested the networks at several schools in the area,and at the town hall. It is not possible to surf on www on any of these networks using a PC running Linux. My conclusion is that there has to be some kind of filtering of traffic that exclude PC's running Linux. From the same PC I can send and receive email, I can ping and trace (mtr) addresses on www, and I can view webpages that are on servers on the inside of the filtering-gateway. The filter used is InterScan Web Security Virtual Appliance from TrendMicro
I have also demonstrated for the admins at the town hall that using Linux-PC on a "clean" network, surfing is no problem. By doing these small tests I have demonstrated that Linux is not the problem.
Tomorrow I'm going to visit the network providers admins, so that they could see what happens when a PC running Linux tries to access www. What kind of things should I test to document, or find the problems? So far I have just used MTR to document slow respons, wget --no-proxy to document that www hangs and ends time out, ifconfig to show NiC settings, and route.. Could this be a problem with /etc/resolve.conf?
The network provider is the same company that refused to turn on IMAP on the exchange servers, resulting in 3 week without mail at our school. All the other schools had to upgrade Outlook in order to connect to the new exchange-server with MS MAPI settings. MS Gold partners are so nice...
Networking :: Network Provider Blocking PCs From Accessing Website?
Feb 21, 2011I have tested the networks at several schools in the area,and at the town hall. It is not possible to surf on www on any of these networks using a PC running Linux. My conclusion is that there has to be some kind of filtering of traffic that exclude PC's running Linux.
From the same PC I can send and receive email,I can ping and trace (mtr) addresses on www, and I can view webpages that are on servers on the inside of the filtering-gateway. The filter used is InterScan Web Security Virtual Appliance from TrendMicro I have also demonstrated for the admins at the town hall that using Linux-PC on a "clean" network, surfing is no problem. By doing these small tests I have demonstrated that Linux is not the problem.
Tomorrow I'm going to visit the network providers admins, so that they could see what happens when a PC running Linux tries to access www. What kind of things should I test to document, or find the problems? So far I have just used MTR to document slow respons, wget --no-proxy to document that www hangs and ends time out, ifconfig to show NiC settings, and route...
The network provider is the same company that refused to turn on IMAP on the exchange servers, resulting in 3 week without mail at our school. All the other schools had to upgrade Outlook in order to connect to the new exchange-server with MS MAPI settings.
Ubuntu Security :: Blocking Linhost274.prod.mesa1.secureserver.net From Accessing Machine
Feb 3, 2011I am trying to keep linhost274.prod.mesa1.secureserver.net (IP 208.109.14.77) from accessing my machine. Several times per evening (as far as I see) it connects to my machine, each time on a different port, and pushes up data transfer. I can't find what it does, it just pushes a GB or more over the line and then stops. I try to keep it out with UFW:
[Code]...
General :: Accessing Web Server From The Outside World?
Jul 4, 2010I have successfully installed "LAMP" and can get to my web server by typing 10.0.2.15. How can I make it so that when I type in my domain name it brings up my web server?
View 1 Replies View RelatedGeneral :: Accessing A Windows Mail Server?
Feb 15, 2011I'm on a network where everyone is using Windows except me. Now I have this problem that the mail server is on a windows host mailserv.company.local and the only way I can access this host is through samba: smb://mailserv.company.local but how do I set my machine to receive mail from this server?
View 2 Replies View RelatedGeneral :: Accessing A Windows Box Via VNC Through A Debian Server Via SSH?
Aug 25, 2009I am using XP at work. I want to get to my home XP box. I have been using VNCTight with port forwarding from my router to get to my home box. I have a Debian server I use just for SSH (no graphics). I would like to open a SSH tunnel to my Debian box, then open a VNC connection that will go through the ssh and then be forwarded to my home XP box. This way everything from my work computer (or wireless laptop) will be secure to my internal network. I know that I can buy software, but that is not as fun and I wont be learning anything that way.
View 3 Replies View RelatedGeneral :: Accessing MS SQL Server 2005 Standards With C Programming?
Oct 14, 2010If you would share the different options to access MS SQL 2005 using C? We are using gcc compiler.
View 2 Replies View RelatedGeneral :: Monitor The IP Address Of Machines Who Are Accessing The Server?
May 7, 2010I have developed a website. Now i would like to monitor the IP address of machines who are accessing the server. The simplest possible solution to this that comes first into my mind is to use jsp inbuilt tags.
Code:
<%
out.print( request.getRemoteAddr() );
out.print( request.getRemoteHost() );
%>
but it has given me some other IP address(May be a proxy server's ip address)
So i was left with one choice is to run netstat on host server . Here is what i have done.
Code:
netstat -an | grep 8080 (As tomcat runs on port 8080).
Should i modify the command or there is any other way around to monitor the IP address?
Programming :: C - For System Calls, Is Blocking Or Non-blocking Default?
Mar 23, 2010For system calls, is blocking or non-blocking default in C? Simple question, just am not seeing the answer super quickly.
View 4 Replies View RelatedSecurity :: Block IP Range Of China Russia And Other Countries?
Jun 24, 2010My server was attacked by china, russia, and from other countries via ssh. I use ssh from other part of the network like internet to access my home server. I just want to know how to add ip range of other country in hosts.deny file.
View 14 Replies View RelatedProgramming :: Blocking And Non Blocking TCP Send/recv?
Dec 25, 2010I have a device that is working on modbus protocol andI have written a small program(with block TCP read method ) to read its registers via modbus protocol.my program is working very well but except those times that I unplug the Ethernet cable or turning off the modbus gateway during programs work.at this time my program stops on recv system call (if it reach this system call exacly when I unplug Ethernet cable or turning off the modbus gateway during programs work).I changed my source to work in nonblock TCP method, at this time with the same situation my program does not stop/block on recv system call but after pluging back the Ethernet cable or resuming the connectivity situation back it reads data incorrectly .this is my code:Quote:
#define DEBUG
#include <fcntl.h>
#include <string.h>
[code]...
Networking :: Allow Multiple Users In Several Countries To Access One Corporate File Depository
Oct 9, 2010I am looking for solution that would allow multiple users distributed over several offices in several countries to access one corporate file depository. The features I am looking for, are as follows:
- There should be the way to establish user groups and then define for each folder access level (read/write) for every user/group. Every users is given his login and password.
- This file depository should be accessed from both Linux and Windows clients
- There should be a way how to sync certain folders/files on one's PC so that it is possible to work off-line and then sync back to the common depository.
Then I plan to launch some regular backup routine on that folder where all the files of depository are kept. I can imagine that the solution could be involving several tools, ie access for Windows users might involve setting up samba server, but I don't know how to establish all the limited access stuff for Win clients via samba.
General :: Windows - Accessing The Desktop Of A Linux Machine (server) Throught Remote Access?
Jun 8, 2011I was looking for:how to access my Linux machine(OpenSuse 11.3) that is being hosted at my hoster company from my home Win Pc, I found TightVNC , but I am confused, should I install it on both systems ( viewer and server) ? .. what about the VirtualBox , can i Access with that tool or it is only for mounting the local Virtual Machines?
View 2 Replies View RelatedServer :: CSF Is Blocking Emails To Be Sent Out
Jan 3, 2011I've a CentOS Box with no control panel.. I used to manage it via SSH. Any way, I've installed CSF/LFD on it.. and it seemed to be working just fine. The only problem I've encountered is that when I start and enable CSF, messages and emails keeps stocked in the mail queue.. I've double checked and made sure needed ports are opined.. But, I still have the problem.
View 2 Replies View RelatedServer :: Blocking Social Networking On The LAN?
Dec 23, 2010I have a Debian server running at the gateway level on a LAN. This runs squid for creating block lists of websites - for eg. blocking social networking on the LAN. Also uses iptables.
I am able to do a lot of things with squid & iptables, but a few things seem difficult to achieve.
1) If I block http://www.facebook.com, people can still access https://www.facebook.com because squid doesn't go through https traffic by default. However, if the users set the gateway IP address as proxy on their web browser, then https is also blocked. So I can do one thing - using iptables drop all outgoing 443 traffic, so that people are forced to set proxy on their browser in order to browse any HTTPS traffic. However, is there a better solution for this.
2) As the number of blocked urls increase in squid, I am planning to integrate squidguard. However, the good squidguard lists are not free for commercial use. Anyone knows of a good squidguard list which is free.
3) Block yahoo messenger, gtalk etc. There are so many ports on which these Instant Messenger softwares work. You need to drop lots of outgoing ports in iptables. However, new ports get added, so you have to keep adding them. And even if your list of ports is current, people can still use the web version of gtalk etc.
4) Blocking P2P. Haven't been able to figure out how to do this till now.
Server :: IP Blocking - Block ALL Connections Except For Certain Ones
Feb 8, 2011Ok so, buddy of mine has his ssh server setup and upon checking his logs he sees a ton of failed attempts. Now obviously these are people that are scanning him and trying to brute force him. So is there a way to block them? We know you can block each IP but is there a way to block ALL connections except for certain ones, such as his and mine? Maybe a couple others.
View 6 Replies View RelatedServer :: Skype Blocking In Squid?
Jun 6, 2011I configured squid in oracle enterprise linux 5.I want to block skype access.i configured the following to block skype.but it is not blocking.acl skype_blocking urlpath_regex [0-9]+.[0-9]+.[0-9]+.[0-9]+ http_access deny skype_blocking
View 3 Replies View RelatedSecurity :: Blocking A Specific IP Address From Server?
May 8, 2010I would like to COMPLETELY block a specific IP address using iptables. I found this one:
Code:
iptables -A INPUT -p tcp -s xxx.xxx.xxx.xxx -j REJECT --reject-with tcp-reset
Will this work? How do I undo the changes later?
Server :: Blocking IP Address For Fake Users?
Feb 4, 2011How to block an ip address from mikrotik so that when a fake user use this ip he doesn't get internet but in the mean time real user gets internet. Real user will not harm if fake user trying to access.
View 3 Replies View RelatedServer :: Blocking Bad Bots & HTACCESS Optimization?
Nov 7, 2010My Pastebin for .HTACCESSIf you can offer any tips on improvements..but the main reason: I cannot get the bots to stop showing up.Esp the first one in the list.I need to block these two specifically
Code:
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8
&
[code]....
Server :: Blocking Mac Based Address In Squid?
Apr 6, 2011I need to block mac address in my network then i foolowed as below acl's but am getting output as follows I tried as in /etc/squid/squid.conf acl block arp aa:aa:yy:yy:xx:xx http_access deny block but it give me error as like: - (This is the output of # squid -k parse) aclParseAclLine: Invalid ACL type 'arp' FATAL: Bungled squid.conf line 1234: acl block arp aa:aa:yy:yy:xx:xx squid Cache (Version 2.5.STABLE6): Terminated abnormally.
View 7 Replies View RelatedServer :: MailScanner Blocking Docx Files?
Sep 17, 2010My MailScanner running on CentOs is blocking docx files, saying "The original e-mail attachment "****.docx" is on the list of unacceptable attachments for this site and has been replaced by this warning message.
I've tried adding it the list of allowed files:
/etc/MailScanner/filename.rules.conf:
allow .docx$ - -
but it still blocks them.
I've also tried manually coping the message file from the /var/spool/MailScanner quarantine/ directory into /var/spool/postfix/incoming
but this did not result in the mail being delivered.
I desperately need these mails released, and docx files to be allowed unconditionally. Anyone know why the above isn't working? Failing that, can all file blocking be turned off? I'd rather have virus relayed than legitimate mails blocked.
Server :: Video Streaming Acl Also Blocking Exe - Rar And Other Downloads ?
Aug 22, 2009I have these ACLS for video streaming like ..... & onilne tv channles. But they are also blocking downloading exe,rar,and other software connectivity like TeamViewer. What acl are bsically blocking my downloading of exes and rar files and teamviewr connectivity .
acl WMP browser Windows-Media-Player/*
Server :: Website Blocking Through SQUID Proxy?
Aug 4, 2010i am using squid proxy server to block some websites in my organization.now i was doing one testing that is, when i blocked Google. gmail automatically gets block.is there any method by which i could block google but gmail access is
View 1 Replies View RelatedUbuntu Networking :: Server Blocking SSH From Work Network
Feb 2, 2010I have an ubuntu 8.04 dedicated server running openssh which I am having problems with.
The server is based in England yet I am currently working from Thailand. Slow speeds and timeouts I am used to but it is now over 24hr since I have managed to SSH the server (from here).
I just tried remote desktop on my PC back in the UK and this connected straight away through both SSH and SCP.
Thinking that it may be the IP being blocked from my works network I switched off wifi on my phone and tried to connect over the data network a few times with no luck.
Another strange problem is that when we got the server it was locked into a chroot jail which SSH(22) always leads into. After accessing SSH on port 22 I have to run a break script to gain root access. The sshd_config file says that the server is listening on port 57 yet I have never been able to access this.
Code:
> netstat -a | grep ssh
tcp6 0 0 [::]:ssh [::]:* LISTEN
> iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
[Code].....
Server :: Hot To Block Gmail Without Blocking Https In SQUID?
Apr 8, 2010My Problem is: I want to stop gmail access without blocking https. Yes in my squid proxy normal [URL].. is not accessible. But gmail recently started https service by which user can still get access to gmail. I DONT WANT TO STOP https CAUSE ITS BEING USING BY OTHER PROGRAMS.
View 1 Replies View RelatedServer :: Putting IP Blocking In A Separate Conf File?
Jan 1, 2010Running Red Hat (not sure of the build atm) and I need to be able to put all of the IP blocking in a separate file. It will eventually be uploaded to a large number of hosting accounts, and modified from time to time...so it isn't feasible to modify that many httpd.conf files each time we need to add an IP to be blocked. In httpd.conf I can add the "Deny from" line to the following directive and blocks it just fine:
Code:
<Directory "/var/www/html">
#
# Possible values for the Options directive are "None", "All",
# or any combination of:
# Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
[code]....
There is an include to pick up all *conf files in ../conf.d, and everything else in there is working just fine. I created a file called robots.conf; it currently has a set of mod_rewrite rules which work. So I added this to that file:
Code:
<Directory "/var/www/html">
Order allow,deny
Allow from all
Deny from 123.456.789.098
</Directory>
It is not blocking access from the IP with it in there.I've done all of the usual things; restarted Apache, cleared browser cache etc. I can also block it using that same directive in a local .htaccess.
Server :: Sendmail DNSBL Blocking Authenticating Users?
Feb 2, 2010I have a problem with sendmail. I am using the zen.spamhaus.org dnsbl, and it is doing a wonderful job of blocking incoming spam from open relays. But it is blocking my users who are on a dynamic ip range from any isp remotely. They should be able to authenticate and send messages no matter where they are as long as they authenticate right? I just want to use the blacklist to block incoming mail to my server that is being distributed to our email addresses.
I want to block people that are hosting mail servers and sending mail to my domain from isp sub-nets. But I don't want to block my users that are sitting on isp subnets using their mail client to authenticate over smtp and send an email from my mail servers.
Networking :: Unwanted Blocking Ip Address And Session Log Out In Ubuntu 10.04 Server
Jun 29, 2011I have UBUNTU server 10.04 LTS with 3 NIC "eth0" local and eth1,2 as internet connection and it acts as firewall, http proxy and samba file server ,I installed Zentyal panel manager for my server for easier management I did not configure any specific rule for my firewall but I have some problem with my clients who wants to connect to my server as gateway or as file server even my self experienced these problems too. these problems are as follow:
1. some time for a few minutes (maximum 10 minutes) my server block some of my clients to access it or internet but just for minutes but it is very annoying.
2. all of my clients those who login to an https servers or login to their mail or those who has some software like team viewer say that they are logging out from their session randomly I mean some of them logging out from their mail(yahoomail or googlemail ) or disconnecting from teamviewer connection or as I saw team viewer disconnecting for a few seconds and then comes back again. but I did not set any thing in my firewall or other services. this is my complete iptable rules:
