Questions tagged [blocking]
The blocking tag has no usage guidance.
25
questions with no upvoted or accepted answers
4
votes
1
answer
4k
views
How do iptables work with NFQ in terms of traffic shaping in snort?
I'm trying to understand how iptables and NFQ work together with snort.
The reason that I ask this is because from what I understand snort can be set to IPS via NFQ but if you have iptables there ...
3
votes
0
answers
2k
views
Block Bad Bots in Nginx for Multiple Sites
I need to block a bunch of robots from crawling a few hundred sites hosted on a Nginx web server running on a Ubuntu 16.04 machine.
I've found a fairly simple example here
(important part of the ...
2
votes
1
answer
4k
views
NGINX block location access and redirect to custom error page
I have a issue with my NGINX setting with redirecting to a custom error page on another location (incl. css, images, js) if a error page should be thrown.
At first I would like to block access to an ...
2
votes
0
answers
827
views
determine if threads on a cpu are blocked? What are the causes of thread blocks?
The load-average reported by uptime command also displayed in top provides the the average run-queue length over time (1, 5 and 15 minutes)
The run-queue length is the sum of the number of threads (...
1
vote
0
answers
577
views
Possible STP Issue with Cisco SG350 Switches
we are having a weird issue with a network of Cisco SG350 Switches that I cannot figure out. We are thinking it may be related to STP but have verified all the normal problem points (i.e. proper ...
1
vote
1
answer
3k
views
How can I block all IPv6 Adresses starting like this 2a01:598:xxx in my .htaccess file?
How Can I block all IP Adresses that start like this 2a01:598: in my htaccess file?
I tried:
Deny from 2a01:598::/28
and i also tried it like this:
Deny from 2a01:598::
But it doesnt work? What ...
1
vote
1
answer
543
views
How to keep md-raid from blocking IO?
I run a server with md-raid (software) level 1 (2 HDDs mirroring) and several different applications run on it.
The problem arises when file-intensive jobs (e.g. extracting large archives) run while ...
1
vote
0
answers
274
views
Apache Bot Blocking when using <Location> element
I was looking through my access logs today and concluded I should probably make an effort to deal with bad traffic. I am trying to use this list (https://github.com/bluedragonz/bad-bot-blocker) as as ...
1
vote
0
answers
215
views
What can lock the only MySQL db process?
A plain old "delete single record" statement froze on me. Suspecting a (dead)lock issue, I checked the process list to see what blocks the delete. The delete statement was the only running db process ...
0
votes
0
answers
88
views
Squid not blocking access to websites
I'm on Ubuntu Server 22.04.3 LTS and I'm trying to learn a bit about Squid.
I installed Squid v5.7 and one of my tasks is to deny access to a list of URL's.
I modified "squid.conf" file and ...
0
votes
1
answer
467
views
How to check if a process is running or blocked on lock or I/O?
There are 2 instances of a script reported by ps.
How can I see in the command line if one of those (and which) is blocked on either I/O or on a file lock?
0
votes
0
answers
143
views
Restrict access to server for TOR and VPN users
Is this possible to restrict access to all users, who try to connect to my web server using TOR or VPN? I'd like to geoblock some users and also want to avoid them accessing my website even if they ...
0
votes
1
answer
554
views
Returns of UDP packets are discarded
I use High avaibility pfSense 2.6.0 cluster and I strange behavior with UDP when use Discord voice channel.
In fact, discord voice channel display "No route" and traffic analysis paquets ...
0
votes
1
answer
776
views
After USBGuard having blocked all USB devices including keyboard, is there any way to stop the service?
After USBGuard having blocked all USB devices including keyboard, is there any way to stop the service?
Or will I need to reinstall the system as it is rendered unusable if it is not remotely ...
0
votes
0
answers
437
views
Bind/Fail2ban how to reject requests from certain domain
Today I got my VPS stucked.
Centos 7, 4 cores, Bind 9.11.
From ssh I got
Message from syslogd@host at Jul 18 09:46:16 ... kernel:NMI watchdog:
BUG: soft lockup - CPU#0 stuck for 41s! [f2b/observer:...
0
votes
1
answer
4k
views
HAProxy - Multiple sites, multiple acl's
We are busy with setting up HAProxy. Almost everything is working, except setting it up without multiple sites with different acl's.
What we want:
Using HAProxy with multiple sites, all on the same ...
0
votes
1
answer
165
views
MongoDB foreground index build blocks secondary reads for all databases
Today one of the users of our MongoDB 3.0.12 sharded cluster has (wrongly) issued a foreground index build on its own database (pride_archive_ms), after the operation completed on the primary member ...
0
votes
1
answer
158
views
Got blocked by server after starting TCP nodejs sever. Why?
I recently installed node on my VPS, and tried to complete a tutorial. I saved this code into server.js and hit node server.js in putty. I got instant "ban" from my VPS, I can't access it, however on ...
0
votes
1
answer
30
views
Apache2: How can I get Apache2 to not respond?
I didn't find a way but it can't be so hard : How make Apache2 Listen a port but not responding.
My VH:
<VirtualHost *:80>
ServerName catchall
</VirtualHost>
I don't want to respond ...
0
votes
1
answer
441
views
Debian Dmesg Error - What does this output mean regarding an outage on eth1?
The tale of the NIC that quit;
I have chucked the end of dmesg output from a server into pastebin;
This server (PowerEdge 1850) has two NICs, eth0 and eth1. eth1 has a couple of VLANs defined on it, ...
0
votes
1
answer
398
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 ...
0
votes
1
answer
66
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 ...
-1
votes
1
answer
607
views
How to block via Windows 2008 R2 firewall based on workstation's name?
over 8GB of traffic from a workstation named KHAOSSERVER has occurred since yesterday; in the Security Event Log are records like this:
An account failed to log on.
Subject:
Security ID: NULL ...
-1
votes
1
answer
1k
views
How to block videos by title on youtube using Squid?
For example,i want to block videos that contain the word "cat" in the title.
I also do not want the blocked videos appearing in:
-Recommended Channels tab
-Recommended/related videos
-Search ...
-1
votes
2
answers
2k
views
Allow visits only via domain, block by ip address
I am trying to block people from accessing my server via my ip address. Ideally I would like them to only be able to access it using my domain name. I have searched Google and unable to find ...