Is anyone using snort?
Does it really block any web based attacks?
I know I can do port scans, and it can alert you to a whole bunch of false positvies, but is it blocking/detecting any serious attacks on your web server?
If so, which rules are the one is alerting on?
to replace the current router/firewall/gateway on my home LAN with a lower-end PC running pfSense. (A FreeBSD-based distro with a web GUI for managing pf and the like.)
Since the system will be passing all the network traffic anyway, I'm interested in the possibility of having it watch for anything suspicious. Snort is the obvious choice: I want it to spot incoming/outgoing suspicious network activity.
What I wonder, though, is if there is really a lot of benefit to running this on a home LAN? If it was a big corporate network, I could see wanting it to keep an eye on things, but we only have a handful of machines, and they're all pretty secure.
It'd be running on a ~1 GHz PC with 512 MB RAM... Given that the machine would already be acting as firewall/router, caching DNS server, and running PHP/Apache for the management interface / graph generation, is piling Snort on top of that asking for trouble?
I doubt anyone is writing their own rules so what do you think is the best site for Snort rules for a web server which are strong but also do not result in many false positives.
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View 0 Replies View RelatedDo many hosters use Snort (intrusion prevention software) on their servers as means to raise security level?
If not Snort, what other intrusion detection/related tools are currently popular?
It would be great to learn the opinion of hosters as well. Early-warning intrusion detection could be very useful in many cases.
Does anyone have snort logging to a mysql database?
I am trying to get that to work so I can view the alerts with BASE.
I followed the instructions but snort is not logging to the DB,
I am curious, what is the best way to ban certain IP from accessing server? I have software firewall (APF) and there is, of course, /etc/hosts.deny.
Which is the most efficient? I've read that software firewall becomes unstable after so many entries. Does the same apply to /etc/hosts.deny file?
Or is there a better way altogether?
some Chinese forums hotlinking images from my site and I even delete those images they keep sending me huge amount of http requests to my hosting server and eating 800mb of memory and upto 1GB cause server crash
I tried to block incoming referrer traffic from those sites using htaccess but it didn't work , I still see their http request on my server logs and memory keep goes high , am not sure my code is the right
how can I block these http request from these domains , what is the right htaccess code , I use DirectAdmin panel by the way
Can any one let me know how to block a range IP on SSH?
Eg: i'd like to block all IP: 67.63.123.xxx
I'm currently experiencing a lot of IP's starting with 200 and 201 (from Brazil) some IP’s have over 200 connections. I have APF installed and want to know how to block a block on ip's if this is possible.
IPS:
200.11.*******
201.*******
I have DDos Attack right now so I want to block all the IP from all over the world and just allow certain IP range.
How to do it using APF or any other way.
For example I want to block everything but Germany IP
Code:
53.0.0.0/8
62.4.64.0/19
62.8.32.0/19
62.8.128.0/17
62.24.0.0/19
62.26.0.0/15
62.40.0.0/19
62.44.32.0/19
62.48.64.0/19
62.50.32.0/19
62.50.96.0/19
62.50.192.0/18
62.52.0.0/14
62.61.32.0/19
62.68.0.0/19
62.72.0.0/18
62.72.64.0/19
62.75.128.0/17
62.78.64.0/20
62.80.0.0/18
62.80.96.0/19
62.89.160.0/19
62.91.0.0/16
62.93.192.0/18
62.95.128.0/18
62.104.0.0/16
62.109.64.0/18
62.109.128.0/19
62.111.0.0/17
62.112.32.0/19
62.112.64.0/19
62.112.128.0/19
62.116.128.0/18
62.117.0.0/19
62.128.0.0/19
62.128.160.0/19
62.133.0.0/19
62.138.0.0/16
62.141.32.0/19
62.141.160.0/19
62.145.0.0/19
62.143.0.0/16
62.144.0.0/16
62.146.0.0/16
62.152.0.0/19
62.152.160.0/19
62.153.0.0/16
62.154.0.0/15
62.156.0.0/14
62.165.0.0/19
62.168.192.0/19
62.169.0.0/19
62.176.128.0/19
how can i block to access to some IP?
for examaple scripts in my hosts can not access to some IPs i want
Fortigate appliances blocking an IP that is not in RBLs I have a problem with the IP 66.187.108.157 of my VPS it seems to be blocked by Fortigate appliances, as you can see in this error message:
SMTP error from remote mail server after RCPT TO:[url] host mail.am.com.pe [200.62.221.107]: 554 5.7.1 This message has been
blocked because it is from a FortiGuard - AntiSpam black IP address.(connection black ip 66.187.108.157)
However I have searched in this URL [url]and it is clean.
Any ideas on how to have/force Fortigate databases to become updated.
I'm having difficulties with a whm running on centos dedicated server. The problem is that we receive too much of spam and junk emails. by too much I mean 2000 bulks per week. It's killing us.
how I can stop it.
IM about tired of spam and hackers putting phishing items on my server.
My question is.
How can I block the whole world expect for US, CA and UK?
I've added several countrys to csf's csf.deny list but half of them keep disappearing.
Is there any way to block a particular ISP? Have a visitor that changes IP hourly, but the IP always resolves back to a hostname like dsl.yuns.sksk.uk .
I have CSF installed. Any way to block all visitors from dsl.yuns.sksk.uk?
in one of my servers i have this line in my ConfigServer Security & Firewall:
190.28.118.155 # lfd: 10 (suhosin) login failures from 190.28.118.155 - Mon Jun 16 23:27:50 2008
is this ok? i mean... its an attack of some sort? i know suhosin is meant to increase php security, so its blocking an attack right?
I have blocked this IP 125.115.144.28
/etc/apf/apf -d 125.115.144.28
But
netstat -anp|grep tcp|awk '{print $5}'| cut -d : -f1 | sort | uniq -c | sort -n
It still showing
202 125.115.144.28
Why?
Is it supposed to blocked right away, or need some time to get blocked.
When I checked /etc/apf/deny_hosts.rules
The IP is in the file.
I set up a forum for a small group of users, so I don't really wish to see spiders or bots on it, so I've put a robots.txt file there to prevent all of them from accessing the forum pages.
I know not all bots follow the robots.txt rule, and these days a really annoying bot called MUNAXNET or Munax AB with IP range 82.99.30.0 - 82.99.30.127 is causing the forum to have extra and unexpected loads.
I've tried to block this IP range with .htaccess and uploaded it to the root of the site a few days ago, here is the content:
<Limit GET HEAD POST>
order allow,deny
deny from 82.99.30.0-82.99.30.127
allow from all
</LIMIT>
However strangely it seems that all of these are not working for this bot, today I saw my forum had 80 users online and that army still keeps coming and browsing all pages of my forums...
I tested the .htaccess with blocking myself, and it actually worked for me, dunno why it's not working for that bot..
I was just researching my log analyzers to see whats happening... I noticed something new in the logs, a large number of unnamed robots or spiders... so I found the robot... it was this:
23310 7.99% 23303 9.48% 1159765 18.56% 22 0.12% 77.88.26.26
After some reading, sites say the ip belongs to spider26.yandex.ru
For simply security reasons, would it be in best interest to block the entire subnet? It seems that the same IP ending in .25 belongs to spider25.yandex.ru
I have a Juniper firewall. I'm seeing a ton of traffic from the Twiceler bot in the range of 100,000 hits a day. Luckily they've more recently put up a list of IP addresses their bots use at:
[url]
So, I'm blocking all of these now. However I think it's a simple Netmask issue I'm having. I'm blocking all ports from
208.36.144.0/24
38.99.13.0/24
38.99.44.0/24
64.1.215.0/24
However, I am still seeing the bot in server log files. Could it be that I should not be specifying .0 at the end, but instead .1? Like this in the policy?
64.1.215.1/24
I have spamassassin configured its working 90% but still I am receiving mails from my ID only. Like I have info@domain.com so I am receiving mail from info@domain.com to info@domain.com.
View 7 Replies View RelatedHow do I block known proxy sites such as anonymouse.org or such via CSF (firewall)? I'll need to block by domains, wildcard domains (such as *proxy.tld) and IP's.
What is the proper way and is there a nice list of such proxies? I'm trying to prevent some degenerate troll from accessing my forum.
Since yesterday I have noticed some odd activity at one of my websites - www.cartuningcentral.com
The problem is that I am getting huge traffic from what I would say are traffic exchange programs, which I didn't buy, and don't want to have at all.
Examples of the referrals I am getting are:
[url]
[url]
Full details can be found here:
[url]
Now, I have tried to block all those using .htaccess, but I am by no means an expert on that.
Here's what I have done:
RewriteEngine on
# Options +FollowSymlinks
RewriteCond %{HTTP_REFERER} ^(http://)?67.192.42.*$ [NC,OR]
RewriteCond %{HTTP_REFERER} (tserve) [NC,OR]
RewriteCond %{HTTP_REFERER} (trafficserver) [NC,OR]
RewriteCond %{HTTP_REFERER} (67.192.42.2) [NC,OR]
RewriteCond %{HTTP_REFERER} (67.192.42.5) [NC]
RewriteRule .* - [F]
But it's not working at all.
how to block those referrals please?
It can be either using .htaccess, php, whatever.
I Have APF and BFD Installed but it always seems to show 80 odd events before blocking the IP. Is there a way of setting it to say 10 wrong attempts?
I Tried this, but it hasn't done a thing. below happened after the change.
Quote:
REQ="/usr/sbin/sshd"
if [ -f "$REQ" ]; then
LP="/var/log/secure"
TLOG_TF="sshd"
TRIG="10"
Quote:
Originally Posted by From BFD E-mail
The remote system 205.234.140.219 was found to have exceeded acceptable login failures on URL; there was 83 events to the service sshd. As such the attacking host has been banned from further accessing this system. For the integrity of your host you should investigate this event as soon as possible.
Executed ban command:
/etc/apf/apf -d 205.234.140.219 {bfd.sshd}
The following are event logs from 205.234.140.219 on service sshd (all time stamps are GMT -0600):
Feb 12 09:08:32 serverthree sshd[4552]: Failed password for invalid user test from ::ffff:205.234.140.219 port 35549 ssh2 Feb 12 09:08:32 serverthree sshd[4552]: Received disconnect from ::ffff:205.234.140.219: 11: Bye Bye Feb 12 03:08:33 serverthree sshd[4555]: Invalid user test from ::ffff:205.234.140.219 Feb 12 03:08:35 serverthree sshd[4553]: Failed password for invalid user test from ::ffff:205.234.140.219 port 35745 ssh2 Feb 12 09:08:35 serverthree sshd[4554]: Failed password for invalid user test from ::ffff:205.234.140.219 port 35745 ssh2 Feb 12 09:08:35 serverthree sshd[4554]: Received disconnect from ::ffff:205.234.140.219: 11: Bye Bye Feb 12 03:08:35 serverthree sshd[4557]: Invalid user test from ::ffff:205.234.140.219 Feb 12 03:08:35 serverthree sshd[4555]: Failed password for invalid user test from ::ffff:205.234.140.219 port 35794 ssh2 Feb 12 09:08:35 serverthree sshd[4556]: Failed password for invalid user test from ::ffff:205.234.140.219 port 35794 ssh2 Feb 12 09:08:35 serverthree sshd[4556]: Received disconnect from ::ffff:205.234.140.219: 11: Bye Bye Feb 12 03:08:36 serverthree sshd[4559]: Invalid user test from ::ffff:205.234.140.219 Feb 12 03:08:37 serverthree sshd[4557]: Failed password for invalid user test from ::ffff:205.234.140.219 port 35978 ssh2 Feb 12 09:08:37 serverthree sshd[4558]: Failed password for invalid user test from ::ffff:205.234.140.219 port 35978 ssh2 Feb 12 09:08:37 serverthree sshd[4558]: Received disconnect from ::ffff:205.234.140.219: 11: Bye Bye Feb 12 03:08:38 serverthree sshd[4561]: Invalid user test from ::ffff:205.234.140.219 Feb 12 03:08:38 serverthree sshd[4559]: Failed password for invalid user test from ::ffff:205.234.140.219 port 36033 ssh2 Feb 12 09:08:38 serverthree sshd[4560]:
[snipped irrelevant and lengthy log file - gbjbaanb]
Failed password for invalid user testing from ::ffff:205.234.140.219 port 42990 ssh2 Feb 12 09:10:00 serverthree sshd[4679]: Received disconnect from ::ffff:205.234.140.219: 11: Bye Bye Feb 12 03:10:01 serverthree sshd[4682]: Invalid user testing from ::ffff:205.234.140.219 Feb 12 03:10:02 serverthree sshd[4680]: Failed password for invalid user testing from ::ffff:205.234.140.219 port 43145 ssh2 Feb 12 09:10:02 serverthree sshd[4681]: Failed password for invalid user testing from ::ffff:205.234.140.219 port 43145 ssh2 Feb 12 09:10:02 serverthree sshd[4681]: Received disconnect from ::ffff:205.234.140.219: 11: Bye Bye
----
I am seeing quite a few hacking attempts coming from the TOR network. I'd like to block the TOR network on the firewall level. Anyone know how to block them?
There is a python script, but I am not familiar with Python at all and do not know how run this script. It is supposed to extract all current IP Addresses and provide a list.
I think they have about 450 IP addresses and I would like to block them.
I currently have a private server in my office which has cPanel and APF installed. The server only allows one static IP to access SSH, at the moment I'm away and don’t have a static IP on my current ISP connection so cannot access SSH.
Is there a way to add say 123.456.000.000 which would allow all IP's in the 123.456 block?
What would you think about creating a big text file with IPs of known hackers, bots and similar "bad" creatures to keep out from our servers? Do you think it's worth it?
You can post lists of IPs if you want...
Since some days I have a problem with apf: It can't BAN one of the Ip from file deny_hosts.rules. Other IP's are correctly banned. Of course in apf log are:
apf(28474): {trust} deny all to/from 88.84.141.233
but this ip still have access to my server and scan my ports. I have this problem after editing internals/rab.ports (I added some ports to RAB_PSCAN_LEVEL_2). I don't know how can I fix this problem.
Topic should have title: APF can't block one of the banned IP.
I was told by my colocation provider that in order to get a Class C block through them we would have to upgrade to a full rack or get an ASN. At this time, we don't need the full rack space so I guess I have to go the ASN route (no pun intended).
I'm wondering how easy it is to get an AS number and about how long it would take. I did some research on the apnic site and it looks like the cost is $625 per year for just the AS numbers. Is this correct or is there anything else that we may need.
Are there any sites that sell portable ip address blocks like this [url], but for the united states? I can't really read that site, but it looks like for 150 euros a month you can get a 256 portable IP address block. 89.36.148.0/23 seems to be a block purchased from them [url], then routed to AWKnet.
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