The tag has no usage guidance.

learn more… | top users | synonyms

0
votes
0answers
38 views

blocking subnets in iptables

I currently have a router attached to the main network (192.168.0.x). On this router, I want the ethernet-ports to link to the main network, and the vlan's (wireless) to be set up via a separate DHCP ...
0
votes
2answers
62 views

iptables - access to port 3306 timeout

I cannot connect to mysql from a remote server. I have bind-address commented out but when I add rules in iptables to block other connections the requesting server's connection times out. I tried ...
-2
votes
1answer
134 views

How Temporarily block an IP address making too many hits on the Server with iptables?

this is my first question here. I made this follow script to protect my server against Slowloris and some DDOS. #!/bin/sh # It does not allow more than 10 connections per IP on ports 80 and 443. And ...
0
votes
0answers
60 views

Clients on one VLAN are able to access all but one IP on a separate vlan

So I am having an issue where clients on one specific subnet are able to access all servers on a separate subnet except a server with a specific IP address on another. Any other client on any other ...
1
vote
1answer
50 views

Block IP Address range on IIS 7.5

I have a Windows 2008R2 Server running IIS 7.5. It is getting bombarded with attempted hacks from similar IPs. How would I block the IP range with something like 51.255.65.*? Below is the UI ...
0
votes
0answers
67 views

How to unblock my IP after failed sftp login attempts to google cloud compute instance

We just started using google cloud compute engine, and to connect to the server using sftp a couple of colleagues did a number of failed login attempts. Now we cannot access our google cloud engine vm ...
1
vote
1answer
63 views

Blocking suspicious IPs on firewalls - still relevant?

In interest of improving security, does it make sense to block suspicious IPs on internet facing firewalls? Does anyone know of any reliable block lists? Thanks, Mark
1
vote
0answers
28 views

Nginx reverse proxy gets blocked

We run a wordpress blog in a subdirectory from our main domain. domain.com => Server A (Nginx) domain.com/blog => Server B (Apache) The blog itself lies on a different (cheap shared hosting) ...
1
vote
3answers
412 views

CentOS 7 - Blocking certain countries (Phillipines,Russia,China)

I run a site that only deals with customers in certain locations. Lately my load balancer is being hammered by requests from Phillipines/Russia/China. Mail bots, brute force attacks etc. Is there a ...
0
votes
0answers
15 views

IP block + VPN not working

I have 3 sites that need an IP block for some testing and the only allowed IP is the one provided by a vpn (we use open vpn). Let's say that the vpn IP is 55.55.55.55 and my actual IP is 88.88.88.88 ...
4
votes
1answer
207 views

Finding google unusual traffic

We are a small Internet provider. In order to get Internet access we are using NAT (10-20 users per one public IP). And lately we've met with Google blocking services (captcha and full block) and we ...
0
votes
1answer
828 views

How do I block an abusive IP address using a Netgear FVS338 firewall?

Our Postfix mailserver has been getting thousands of automated login attempts from a bot. The mailserver is behind a Netgear FVS338 firewall. How can I completely block inbound connections from that ...
0
votes
1answer
94 views

Block IPs for some time on HAProxy

I would like to blacklist IPs that are spamming a particular URL, but only for a determined amount of time. let's say 10 minutes. I'm thinking of creating a stick-table, and store the src IP and ...
0
votes
1answer
49 views

How to configure an nginx VHost to hang up on the client in the rudest possible way?

I have a, let's call it, "legacy" VHost configured on an nginx server. It used to be a full site, but it has since been decommissioned and all the content removed. The server block now looks something ...
-3
votes
2answers
153 views

block or log IPs that direct access my website (ubuntu , nginx)

The website is under DDOS, the cloud service is doing a pretty good job for a cost of dozen bugs a month. We are happy! However the attackers have been hitting our site with IP. Currently, we 301 ...
1
vote
2answers
115 views

dnsmasq adblocking only working server-side

I'm trying to create a server-side adblocking mechanism through dnsmasq, but I only get results on the server itself, not the computers attached to my local network. First of all, my router is the ...
0
votes
1answer
325 views

Block all traffic, except specific domians, by windows server 2008 R2 firewall

I've got a problem, which I didn't find any other way to restrict all the outbound traffic on my server. I have a web service, which is deployed on a server, alone. This is about one month that I get ...
-2
votes
2answers
405 views

Emails from my domain getting blocked at all other domains [duplicate]

Recently I tried to set up a new email server using iRedMail on Lubuntu. The mail server workes very well when email conversation is in the same domain. But when a user tries to send email to some ...
1
vote
0answers
560 views

Dynamic IP Blocking on FORTIGATE 200A Firewall

I have FORTIGATE 200A firewall protecting a IIS Server running a ASP.NET website (windows server 2008 and IIS7) I'm not familiar with Fortigate configurations and options. I recently had "attacks" ...
2
votes
1answer
7k views

How can I block traffic FROM Amazon Technologies Inc. (possible DDOS attack) [closed]

I've a small website (portfolio) and I usually notice traffic of about 10-20MB per day. But for few recent days I've noticed about 10-15GB (1000 times more) each day for 4 days now (and it continue ...
-1
votes
3answers
128 views

How do ISPs handle Customer IPs blocked by WebHost [closed]

At my ISP, we issue static IP addresses to customers. A lot of times, we get complaints from our users unable to access their websites or emails from their IPs (but same sites and mails are accessible ...
2
votes
4answers
2k views

/etc/hosts.deny ignored in Ubuntu 14.04

I have Apache2 running on Ubuntu 14.04LTS. To begin securing network access to the machine, I want to start by blocking everything, then make specific allow statements for specific subnets to browse ...
0
votes
1answer
387 views

deny from .htaccess with banned IP list from stopforumspam.com not working?

so i'm trying to use .htaccess to ban a large list (50,000) of suspicious spam IP addresses that i got from this site. the list is almost 1M in size when i add the deny from directive for each ...
5
votes
4answers
11k views

How to run node.js app on port 80? Are processes blocking my port?

I believe the port 80 on my remote instance is blocked, and I am trying to run a node.js app using port 80. I have experimented with ports 3000 and 3002, and both ports are working fine, but I get an ...
1
vote
1answer
3k views

Block all public IP addresses except those whitelisted

We have a 2008 R2 server hosted in a data centre where we have no physical access but connect to it using RDP. We plan to run SQL Server and some other services which should only be accessible to a ...
1
vote
1answer
2k views

Nginx geoipblocking & allowing LAN IPs

I'd like to block IPs with geoip except whitelisted countries AND the local area network. The first part works flawless, the second one not. Somwehere searching the internet I found the codes LH (...
2
votes
2answers
2k views

Block bots by their Java referrer or User-Agent string?

I have been getting a lot of web hits in my logs that crawl most top level pages of my site and show a referrer as a Java version. I see different variants of the Java versions in the referrer, i.e. ...
0
votes
1answer
406 views

Nginx “allow 127.0.0.1” in location block letting in all users

Problem I have the following block in my nginx config. The idea is to let the server access the file but noone else. If anyone else accesses i it should throw a 403. If I comment out the allow line ...
6
votes
2answers
6k views

Fail2ban log filled with entries saying “fail2ban.filter : WARNING Determined IP using DNS Lookup:..”

My fail2ban log at /var/log/fail2ban.log is completely filled with entries saying: fail2ban.filter : WARNING Determined IP using DNS Lookup: [IP address] I think this may have begun after I changed ...
3
votes
1answer
246 views

Fail2ban settings after changing ssh port

I switched my ssh port to 22000 and I changed the port settings in /etc/fail2ban/jail.local to specify to ban on both 22 and 22000 but when I tried failing to login 6 times, my connection was cutoff ...
0
votes
1answer
63 views

Files repeatedly downloaded form same IP - suggestions?

I have a few files that can be downloaded from my website. Every few hours all files are downloaded from the same IP address (98.137.207.97 - might be Yahoo?). How should I proceed? Should I just ...
0
votes
1answer
421 views

Automation of blocking IP address

I have an Ubuntu 12.04 machine running Apache2 which hosts about 10 wordpress websites. Recently I have been subjected to attacks from clients which seem to be sending POST requests to a wordpress ...
1
vote
2answers
388 views

Adding sleep / delay between iptables blocks in shell script

On one server, we're trying to block any access for the country China. We wish to implement this with iptables rather than via .htaccess. The problem we're experiencing though, is that when adding ...
1
vote
1answer
82 views

Does an ip catch all exist?

I'm trying to block specific ip address traffic using this: sudo iptables -A INPUT -s 192.148.10.209 -j DROP Does an ip address catch all exist where I could block all addresses on 192.148.10.* ...
6
votes
1answer
562 views

Amazon S3 appears to be blocking cloudflare IP addresses. How do I fix it?

I have static content that is being served by Cloudflare. Cloudflare points to Amazon S3 to pick up the static content and serves it via a CNAME (cdn.mydomain.com). The bucket is setup properly and ...
1
vote
1answer
1k views

Can't reach server without proxy (website down from my home)

I have a website hosted on Hostinger However I am experiencing problems with my wordpress site. This is really annoying. If I understood the situation right, The server is blocking me or denying ...
1
vote
2answers
2k views

Prevent DNS responses for specific domain completely

Situation: Server (Win 2008R2) is being used in a DNS (amplification) DDoS attack. Amplification factor is already down to 1: Set the DNS server to non-recursive and removed all root hints -> DNS ...
0
votes
0answers
306 views

Check IP Blocking on Windows Server 2008

When I login to google webmaster tools, from last 5-6 days I am getting error regarding Google connectivity issue. It says googlebot is not able to access the site. When I set User agent in firefox ...
0
votes
1answer
2k views

Hacking attempt detected, Can we block user by PC-Name

Recently we notied that hackers are trying to hack our server, we have IP blocking softwares installed on our server but the thing is that, hacker is using dynamic ip addresses to try again and again.....
1
vote
1answer
427 views

View when IP Address Was Blocked in IIS

We had an issue recently where our server started throwing 500 errors because an IP address was blocked that had already been blocked elsewhere. It -appears- that the IP was blocked on individual ...
1
vote
3answers
758 views

Is it possible to automatically block too frequently accessing IP addresses?

One IP address was accessing my site too frequently to be a real user, it was accessing so much that it caused site to slow down. Is there any application that can automatically block IP, if it is ...
-1
votes
1answer
2k views

How to find out why website is not accessible? [closed]

I cannot access a certain website. There are two possible reasons: The block is on the ISP side. The block is at the website. Is there a technical way to figure out which of these are causing the ...
1
vote
1answer
704 views

Regular POP3D Attacks and Blocks

I'm using a self-hosted wordpress blog. I'm using Gmail to access my domain email accounts. I want to know, is built-in email services such as exim, etc are necessary if we are using Gmail to manage ...
0
votes
1answer
760 views

Frequent UDP_IN Blocked for Port Scanning

I run a blog self-hosted with Wordpress. I'm getting frequent email notifications from LFD regarding UDP_IN blocks. I usually get 10+ emails daily about it. The email looks like following: Time: ...
0
votes
1answer
74 views

Security risks of allowing incoming traffic as a response of a previous request

I understand that somebody would want to block incoming traffic as a general rule except for public resources. And I also understand that you could want to block all outgoing traffic except for ...
0
votes
1answer
2k views

Cisco ASA - Unable to create “range” type of network object on 8.2

I'm wanting to block a range of ip addresses on my Cisco ASA 5520 (8.2) using ASDM 6.4. In the help files/cisco documentation, it says, just create a network object with a "range" type, and use that ...
9
votes
2answers
5k views

IIS7 ban IP range [duplicate]

Possible Duplicate: How does IPv4 Subnetting Work? I have a list of IP ranges I would like to ban, an example being: 119.30.47.xx Where xx is anything. I've added the domain and IP ...
8
votes
4answers
21k views

How to Automatically and Temporarily block an IP address making too many hits on the Server in a short timespan?

One of my LAMP servers was recently brought down by some kind of script bot looking for exploits. From the looks of it, it was making so many requests a second, that it overloaded the RAM on the ...
0
votes
1answer
182 views

Block IPs in Local Security Policy

What would be the most efficient way of blocking a list of IPs in Windows 2008's Local Security Policy? Ideally, I would want to block the subnet that the IPs belong to. What IP subnets should I be ...
0
votes
1answer
127 views

Blocking request to port 80 on gateway on Ubuntu

I want to block access to the gateway (192.168.1.1) on port 80, to prevent network user from trying to access the router setup. I'm using Ubuntu 9.10