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0
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1answer
293 views

synchronization between two (or more) file servers : block open files to avoid conflicts

"Short version": When a user opens a file on a local share, other users can open only in read-only, until it is closed. I want this to be true for the remote copy of the file: read-only when the local ...
1
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3answers
6k views

How Do I Block an IP Address on ubuntu?

I have configured Ubuntu machine as router. Steps of NAT configuration are given below: #iptables -F #iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE #iptables-save ...
2
votes
1answer
546 views

Block UDP traffic by rate/string-match on Windows 2008

I am administrating a Windows 2008 server (64-bit). It is being subjected to a focused set of DOS attacks where UDP packets are sent to a specific port and contain a specific string. What I need to ...
2
votes
1answer
110 views

Block specific client on CentOS by client name

I am looking at my Apache access log and there is suspicious activity from several ip ranges. What they have in common is that all of them are identified as "Allegro-Software-WebClient/4.07". Is ...
1
vote
1answer
640 views

Nginx: protect directory and files

I wrote this to prevent the directory "download" to be accessed but from the IP 1.2.3.4. location ~ /folder/download { allow 1.2.3.4; deny all; return 403; } However, the directory ...
3
votes
1answer
3k views

Linux kernel crash - any ideas?

Been getting these runaway conditions on a lightly loaded vps (debian squeeze kernel 2.6.38-bpo.2-amd64, 2GB, SSD) - top load is nothing , then jumps to 30.0 & everything grinds to a halt. I'm ...
8
votes
2answers
10k views

MySQL InnoDB database 'hangs' on selects

I'm trying to fix MySQL configuration on our server. Our app's specifics is that a lot of data is stored in single table (currently over 300 millions of rows). This table is used often for inserts ...
1
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3answers
2k views

How do I block all websites (except for a whitelist of 10 or so) for specific computers on a Windows domain?

I keep seeing references to something called Squid, but I take it that's only for Linux. Rather than needlessly pay $1,000+ bucks for a content filtering subscription on our firewall, I'm seeking an ...
1
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2answers
470 views

How to ban potential hacker IP Addresses from Port 80?

I am hosting a bunch of PHP web sites on a web server. While I have taken all precautionary mesaures to protect all ports, Port 80 specific attacks continue. I want to ban any IP Address that taken an ...
2
votes
5answers
798 views

Block ssh tunneling navigation in my LAN

I would like to stop people bypassing Opendns and squid proxy blocks to get on facebook using ssh tunnel to their pc home. I know I can fix this talking to boss but I'd also like to understand better ...
1
vote
2answers
539 views

Automatically block IP in apache2 - it is possible?

Is there are a way to automatically block IPs with apache2. For example, if we get a lot requests (100s) for non-existing pages (or known patterns, like CHANGE_LIST.txt, etc.) to block that IP and add ...
0
votes
1answer
58 views

Port periodically blocked

I'm wondering what are the possible ways to block some port while it is in use by some other process? Short story long: I've got an app(1) that communicates with another app(2) on one host/local ...
2
votes
3answers
6k views

How to configure a network to block gmail but allow google apps mail?

Google app mail loads via http://mail.google.com/a/[domain] and gmail loads via http://mail.google.com/mail. How can I block computers on my LAN from accessing gmail urls but at the same time permit ...
2
votes
2answers
430 views

I have a blocking transaction, but no statement is shown

My SQL Server 2008 started hanging on simple queries, so I checked for blocking transactions, using the built-in All Blocking Transactions report. Sure enough, such a transaction exists. However, if ...
12
votes
10answers
5k views

Block Facebook for selected users

We have a few users here who are using Facebook during working hours and their productivity is through the floor, as a temporary measure I have remotely edited their hosts files to point facebook.com ...
0
votes
1answer
2k views

htaccess config to block depending on browser agent

In one case i wish to block all Internet Explorer versions from my site using htaccess. I have read several guides but still can not get it to work. what is the most understanding way of doing it. If ...
1
vote
1answer
19k views

Forefront TMG Proxy blocking internal HTTP requests for FQDN

I have Forefront TMG installed as a proxy server. However, whenever I make HTTP requests to servers on the Internal network with a fully qualified DNS name, the proxy denies the connection. Denied ...
0
votes
1answer
744 views

Blocking RDP connections from secondary IP addresses

I have a webserver running Windows 2008 R2 with multiple IPs assigned to it. I want to be able to RDP to the box via the main IP assigned to the box but not from any of the secondary IPs (ie... the ...
1
vote
2answers
1k views

Blocking a specific URL by IP (a URL create by mod-rewrite)

We need to block a specific URL for anyone not on a local IP (anyone without a 192.168.. address) We however cannot use apache's <Directory /var/www/foo/bar> Order allow,deny Allow from ...
0
votes
2answers
152 views

restrict ip stealing

we are working in a lab with set of 35 systems in college. my system is only ubuntu installed and i got the separate ip for my project purpose. and each one having the separate ip. but somebody else ...
2
votes
1answer
4k views

Disk IO causing high load on Xen/CentOS guest

Background I'm having serious issues with a xen based server, this is on the guest partition. It's a paravirtualized CentOS 5.5. I'm not sure if it's hardware or software related, or in between ...
0
votes
1answer
57 views

Blocking Clients while Forwarding All Traffic

Greetings, How to block clients by masking their subnet mask or changing their gateway information while forwarding any outward traffic from such clients to a specific proxy or server to display some ...
0
votes
3answers
255 views

Why is Yahoo blocking our email address verifications and bouncing them back

I have a legitimate site www.angelescity.ph a Free Classifieds site, once someone posts an advert a verification email is sent.. Yahoo has been blocking them, not delivering and bouncing them back, ...
1
vote
1answer
812 views

Need help with IP filtering and port forwarding

I have a static IP assigned to me by my ISP. I want to access a server running tomcat in our network from outside the LAN. Can any one give a few pointers, to what I need to do, and where to start ...
1
vote
1answer
32 views

Firewall blocking files using Reg_Ex needs to be adjusted

We have security in our firewall to prevent SQL-Injection from destroying any of our content: Name Type Context Severity Pattern Configure CS:select_into signature http-url critical ...
-3
votes
1answer
353 views

How to set up websense to prevent workers from answering questions on SO?

Question 1: How to set up websense to prevent workers from posting on SO (and all related sites), without blocking them from viewing answers? Question 2: How to make SO (and all related sites) pop up ...
0
votes
1answer
1k views

How do I block host name instead of just IP?

I was wanting to block a list of specific hosts, specifically so my server has no access to them at all. I tried using host2ip and entering the result into IP tables , but the IPs don't seem to lead ...
2
votes
1answer
1k views

NFS-shared file-system is locking up

Our NFS-shared file-system is locking up. Please feel free to ask any questions you feel relevant. :) At the time, there are a lot of processes in "disk sleep" state, and the load averages on our ...
2
votes
3answers
456 views

Stop slowing down fast and verbose operations when using ssh over slow connections

I often copy many files between 2 servers connected via 1GBit ethernet while I am connected via VPN and SSH over DSL. The problem is, that the verbose output (1 line per copied file) which needs to be ...
0
votes
1answer
305 views

Why is php-firewall blocking these ip ranges, isp's and host's? where can I found the blacklist?

The php firewall is blocking thees ip ranges for spam. Thats ok, but where is the source for this information? $ip_array = array('24', '186', '189', '190', '200', '201', '202', '209', '212', '213', ...
1
vote
2answers
540 views

What's the best way to monitor SQL Server Concurrency issues?

What's the best way to monitor SQL Server Conccurency issues? Specifically my goal is to reduce or prevent deadlocks and blocking and to catch potential concerns before they become a problem. For ...
2
votes
3answers
575 views

block websites in our network

We would like to block users from accessing sites like facebook and all from our network. All the connections are through our router(linux machine). What would be the best way to block the sites on ...
0
votes
2answers
2k views

Hosts file entry directed to a directory on localhost

I have a directory setup with a nice error message at http://localhost/blocked/. I'd like to direct entries in my hosts relating to sites I've blocked to that instead of just 127.0.0.1. ...
1
vote
2answers
181 views

Where is traffic destined for a specific TCP port being blocked?

I have a server that is set up to listen to a specific port (1433), and normally there is no problem accessing that port from anywhere. From one of the locations I work, however, I can't connect to ...
0
votes
2answers
96 views

Site getting blocked on corporate networks

Our site is getting blocked in corporate networks across various companies, but not all. Would appreciate help on what could be the reasons for this and how we can resolve this? Attached are a couple ...
1
vote
2answers
846 views

Apache VirtualHost Blockhole (Eats All Requests on All Ports on an IP)

I’m exhausted. I just spent the last two hours chasing a goose that I have been after on-and-off for the past year. Here is the goal, put as succinctly as possible. Step 1: HOSTS File: 127.0.0.5 ...
2
votes
3answers
5k views

SQL Alter database failed - being used by checkpoint process

On my SQL server 2008, i have a SQL agent job to restore a database on nightly basis. Procedure: find latest backup on other server Kill all conenction to the destination database Restore ...
0
votes
3answers
5k views

check if a domain is blacklisted / blocked

Some clients report to us that our site is not accessible through their internet connection. We suspect our site is wrongfully blocked by some security software/firewall/public blacklist. How can ...
4
votes
3answers
346 views

Can i safely block all ports on my sever

I have a web server running pleks and get attacked a lot every day. I configured a firewall, and there are some predefined services such as www, and ftp, etc. I am planning to block all the ports ...
1
vote
2answers
1k views

Use .htaccess to block *All* access to specific folders

I am not sure how to do this, but I want to block all access to a specific set of folders on my web server. Say secret01 and secret 02... homeDir |- data |- www | |- .htaccess (file) | |- ...
3
votes
2answers
2k views

Are there internet users connecting with HTTP/1.0?

Are there internet users connecting with HTTP/1.0? Such as over a proxy. Because I'm going to block HTTP/1.0 since most of the bots are using HTTP/1.0.
2
votes
2answers
3k views

Log and Block Website using Windows 2008 SBS

A client has asked me to setup Windows 2008 SBS to block and log websites from a list they will provide. As far as I know they only have standard edition which means I cannot use ISA. I was thinking ...
2
votes
2answers
13k views

Squid: how to block websites for a particular IP address?

How to block websites for particular IPs by squid? Please give solution with example or configuration file.
0
votes
1answer
933 views

Block based on keyword

Hai linux guys, I am using linux (RHEL5) Server. I want to block some sites for windows clients, How can i block unwanted sites based on keywords(keywords in text file) in RHEL 5 ? Are there any ...
0
votes
4answers
607 views

Router blocks traffic because no D flag

I have a following issue On my desktop computer I can't access internet. Precisely, i can't ping router. However I can ping other machines on local network and i'm getting IP from DHCP located on the ...
2
votes
1answer
509 views

Administrator is being blocked by server - error 406?

Few days ago I put online new portal that comes with cms I made myself. Problem that occurred is following: Administrator logs to cms, publishes few news and then he can't access portal at all (whole ...
0
votes
2answers
817 views

Will dropping AUTO_INCREMENT rebuild table in MySQL?

I've got table with following schema: CREATE TABLE `tblsomething` ( `something_id` int(11) NOT NULL AUTO_INCREMENT, … PRIMARY KEY (`something_id`) ) ENGINE=InnoDB AUTO_INCREMENT=144620955 I ...
2
votes
1answer
9k views

How can a block IP addresses using Windows Server 2008 firewall?

I have started to get various login attempts from different IP addresses. How can I block these IP addresses in the Windows Server 2008 Firewall?
1
vote
3answers
816 views

Block IPs in apache2

Ok another noob questions here. I have serveral IP's probing my server for phpmyadmin and other administrator stuff, looks like they're looking for something to hack, but honestly I don't care who ...
0
votes
1answer
111 views

Safe mailing list operation

I've been asked to create a mailing list system which will be used to send regular newsletter type emails to our customers. The software side is just about complete, so that needs no discussion. ...