similar to: Problem SSH

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 I recently tried adding a firewall to my Samba 4 server using the port information I found on the wiki. Below is a dump of the resulting rules. root at dc01:~# iptables -S - -P INPUT DROP - -P FORWARD DROP - -P OUTPUT ACCEPT - -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT - -A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m

Hi, to prevent scripted dictionary attacks to sshd I applied those iptables rules: -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -m recent --update --seconds 60 --hitcount 4 --name SSH --rsource -j DROP -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -m recent --set --name SSH --rsource And this is part of logwatch: sshd: Authentication Failures: unknown

This was sent to me regarding the wiki. ---------- Forwarded message ---------- From: "Martin Kon??ek" <mkonicek12 at gmail.com> Date: Mar 7, 2013 4:44 AM Subject: mistake on Securing SSH To: <timothy.ty.lee at gmail.com> Cc: Hi TImothy, I saw wiki http://wiki.centos.org/HowTos/Network/SecuringSSH and it is pretty good, but there is a mistake. *Instead of having* iptables

Alright, I have setup the new rules and am waiting to see if I have any issues. If I do, I will keep working on it. I also read the article below, which mentions exactly what you I was told about 2008 and newer using different ports. https://support.microsoft.com/en-us/kb/929851 Here is the new configuration: root at dc01:~# iptables -S -P INPUT DROP -P FORWARD DROP -P OUTPUT ACCEPT -A INPUT -m

Hi, what mount ntfs file system? My centos return this error: mount: type file system ntfs not suported for kernel I need compile new kernel? thanks

I just looked up 42 and 68. I do not use WINS or BOOTP. I am removing range 1024-5000 and replacing it with 49612-65535 now. I already allowed 389 TCP. Lead IT/IS Specialist Reach Technology FP, Inc On 12/29/2015 03:58 AM, L.P.H. van Belle wrote: > Hai, > > Im missing a few things. > > And maybe time server port to open? Are your dc's time server also? > These are the

Message-ID: <479F2A63.2070408 at centos.org> On: Tue, 29 Jan 2008 07:30:11 -0600, Johnny Hughes <johnny at centos.org> Subject Was: [CentOS] Unknown rootkit causes compromised servers > > SOME of the script kiddies check higher ports for SSH *_BUT_* I only see > 4% of the brute force attempts to login on ports other than 22. > > I would say that dropping brute force

Hello, up to CentOS 5.3 it was possible, to control new ip connections by "recent", "seconds" and "hitcount" -A INPUT -m state --state NEW -m recent --set -p tcp --dport 80 -A INPUT -m state --state NEW -m recent --update --seconds 60 --hitcount 1000 -p tcp --dport 80 -j LOG --log-prefix "FW DROP IP Flood: " -A INPUT -p tcp -m tcp --dport 80 -m state

On 03/08/2017 11:00 AM, Paul Heinlein wrote: > On Wed, 8 Mar 2017, Mark Weaver wrote: > > > Hello all, > > > > I've been googling my brains out since yesterday looking for up-to-date > > information on this matter, and have found information that is > anywhere from > > 15 to 5 years old. I'd really like some information that much more > up to

I added these rules to IPTABLES to slow brute force attacks. iptables -A INPUT -p tcp --dport 22 -s my_subnet/24 -j ACCEPT iptables -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --set --name SSH iptables -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --update --seconds 60 --hitcount 5 --rttl --name SSH -j DROP I would like log entries when connections are dropped to see

What module I can run for my IDE Device Tape? In the Debian use modprobe ide_tape Error: FATAL: Module ide_tape not found. Tanks -- Cimed Ind. de Med. Ltda Mauricio Merlin Machado Analista de Suporte Tel. (11)2244-7257

fail2ban might be good for this. On 04/05/2011 01:00 PM, asterisk-users-request at lists.digium.com wrote: > > Date: Tue, 5 Apr 2011 08:44:41 -0700 (PDT) > From: Steve Edwards<asterisk.org at sedwards.com> > Subject: Re: [asterisk-users] Iptables configuration to handle brute > force registrations? > > On Tue, 5 Apr 2011, Gilles wrote: > >> I'm no expert

I ask because I only receive attacks when I activate icecast. I can not do anything at the application level ?. i used ubuntu server 16.04. thanks. 2018-06-05 14:52 GMT-05:00 Alejandro Flores <alex at mordormx.net>: > I think you should contact to your connectivity provider, hopefully they > can provide you the Anti DDOS protection. > > > On Tue, Jun 5, 2018 at 2:16 PM,

Hello, all. I read this document about iptables recent module. http://blog.andrew.net.au/2005/02/16#ipt_recent_and_ssh_attacks and I would like to filter the excessive spam mail sending ip address by iptables recent module. and some questions. iptables -A INPUT -p tcp --dport 25 -m state --state NEW -m recent --set --name SPAM iptables -A INPUT -p tcp --dport 25 -m state --state NEW -m

Over the last two weeks, we have had at least two "incidents" where our asterisk server got flooded (a hundred or more per second) by SIP packets. Once from 114.31.50.10, second time from 173.212.200.146. We became aware of the problem when bandwidth started suffering because asterisk got very busy sending back replies or rejects (dunno which, I didn't investigate it any further).

On 03/08/2017 06:42 PM, Paul Heinlein wrote: > On Wed, 8 Mar 2017, Mark Weaver wrote: > > > On 03/08/2017 11:00 AM, Paul Heinlein wrote: > >> On Wed, 8 Mar 2017, Mark Weaver wrote: > >> > >> > Hello all, > >> > > >> > I've been googling my brains out since yesterday looking for > >> > up-to-date information on this

Hello, I have well performing iptables in centos 5.2 and 5.3 : -A INPUT -m state --state NEW -m recent --update --seconds 60 --hitcount 1000 -p tcp --dport 25 -j LOG --log-prefix "FW DROP IP Flood: " Centos 5.5, updated today: Without -hitcount : iptables accept the line Including -hitcount : iptables brings an error message: Applying iptables firewall rules: iptables-restore:

Hi! I need to delay failed ssh password authentication as an additional measure against brute force ssh attacks. I understand, that shoud be accomplished through pam, but googling gave me no example. I have CentOS 5.2. -- Veiko Kukk

Hello all, I've been googling my brains out since yesterday looking for up-to-date information on this matter, and have found information that is anywhere from 15 to 5 years old. I'd really like some information that much more up to date on the subject. Specifically configuring Sendmail SMTP authentication (_no smart host stuff_). I've got Sendmail 8.14 installed on a CentOS 7.3

Is the maximum permitted value for --hitcount documented anywhere? I reliably get a iptables-restore error when I specify a hitcount value greater than 20 but I cannot find any mention of there being a maximum value. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB at Harte-Lyne.ca Harte & Lyne Limited