Security is not a product, but a process.

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0
votes
2answers
6 views

Strange characters in nginx log starting with \x

I was hacked and checking nginx logs I found several requests like this one: 169.229.3.91 - - [18/Jun/2016:09:42:19 +0000] ")\xE7\xD1?\xD6\x18.\xC0\xCE\xA3\x7FR\xEA~O$\x0BLi\x13\xA0m\xE7\xF0H4\x92\...
0
votes
1answer
12 views

Centos 6 Require Password to Enable NIC

We are using a dedicated NIC as a port forward target to allow support access to port 22 on a CentOS 6 machine. I would like to prevent the NIC from being enabled without a password. I know I could ...
0
votes
0answers
7 views

TLS auth issue: 'CompanyA@exmple.com “via” SendGrid.me' email is dropped by Exchange

Looking for clarification about what Exchange 2007 considers to be "anonymous authentication" for TLS at the Receive Connector. At the company I'm SysAdmin for, about 3 months ago we were getting "...
0
votes
2answers
19 views

Securing Mail From Admins - Office 365

I'm trying to determine the best solution that allows me to assure our CEO that his Office 365 mailbox cannot be read by anyone, including myself, an admin. Obviously the mailbox is already locked ...
6
votes
6answers
9k views

SSH access problem: debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY

We have a server XXX ON Amazon EC2. SSH is running on a standard (22) port. I placed my pubkey at the /.ssh/authorized_keys file The fun thing is that YESTERDAY it was working great! But today, I ...
1
vote
1answer
8 views

Apache SSL FS disable SHA1

I am using apache 2.2.15 and are about to make it as secure as possible. When I do a scan of one of my websites via the Qualys SSL Test. https://www.ssllabs.com/ssltest/analyze.html It lists me the ...
0
votes
0answers
7 views

ModSecurity duplicate anomaly logs reported instead of single

This is my second time configuring ModSecurity with the OWASP ruleset. Previously I've used version 2.2.5 of the ruleset and now on a different server 2.2.9. I'm trying to configure anomaly detection ...
2
votes
1answer
1k views

Grant NON-administrator privileges to IIS 7

We are implementing a pseudo-Platform as a Service environment. It's a fairly simple set up that parallels Infrastructure as a Service: basically our clients will each have a access to their own ...
0
votes
2answers
713 views

SSH Failed password login - log password

today I checked the log of my sshd and I have discovered tons of lines like :Oct 12 Oct 12 12:31:34 my_user sshd[15324]: Failed password for invalid user admin from 104.194.25.135 port 2683 ssh2 ...
49
votes
7answers
33k views

How to add a security group to a running EC2 Instance?

I have an Amazon EC2 instance running and I will like to add another security group to that instance and then remove the current security group from that instance. Is this possible?
1
vote
1answer
25 views

OpenStack Horizon behind reverse proxy (nginx preferred)

Current situation: I have a Triple-O OpenStack installation (Liberty) where even the "public" network is in a private environment (10.24.7.0/24 network). The only way to get access to that network is ...
-3
votes
0answers
20 views

Secure tomcat (by ip AND basic auth) [duplicate]

I have a server working with tomcat. Inside webapps i've secured one folder. This folder has basic auth to access, all this works. What i need is to protect this folder in another way. Only people can ...
0
votes
0answers
13 views

Multi user passwordless directory specific ssh login

I am running Ubuntu 14.04 LTS. I want to allow multi user passwordless ssh login. But I want to give directory specific ssh access. For example: My home directory(server home) has two folders user1 ...
25
votes
9answers
13k views

How to view all ssl certificates in a bundle?

I have a certificate bundle .crt file. doing openssl x509 -in bundle.crt -text -noout only shows the root certificate. how do i see all the other certificates?
1
vote
3answers
90 views

Are there any disadvantages of blocking port 80 for security reasons?

To improve security, we would like to make https access to all customer sites that we host mandantory, and guarantee this in our terms and conditions. The problem is that currently the Apache ...
-1
votes
1answer
27 views

Server security management service & tools

I'm in a small company and have several servers running Ubuntu, we don't have enough resource for server security management, jobs include: Audit who is login the server Monitor suspicious server ...
-2
votes
0answers
17 views

Unknown port 49152/tcp

After nmaping my server, I have found one strange filtered port accessible from internet : PORT STATE SERVICE 80/tcp open http 49152/tcp filtered unknown On the server side, I can't ...
-1
votes
1answer
11 views

sendmail : closing port 25

Nmaping my server I got theses results : PORT STATE SERVICE 25/tcp filtered smtp 80/tcp open http On the server-side : netstat -lpn Proto Recv-Q Send-Q Local Address ...
0
votes
1answer
6 views

ModSecurity IIS Block Out of Country IPs by X-Forwarded-For

Problem We've had someone that has been trying to crawl our site with random, malicious urls (for about 12 hours now). Here is the log file 2016-06-29 08:17:02 10.X.X.X GET /assets/plugins/lightbox/...
0
votes
1answer
20 views

Is it safe to use only iptables for security?

I have 2 servers on different machines. First machine should send requests to second machine via tcp. Both machine have static ip addresses. Does it secure to protect this interaction between servers ...
0
votes
2answers
2k views

Passed SSL checker, but browser doesn't show secure?

I've set up my SSL certificate following the instructions at http://splittingelectrons.wordpress.com/2012/02/24/how-to-configure-an-ssl-certificate-for-apache-on-amazon-ec2/ I've checked my website ...
4
votes
2answers
4k views

Windows GPO Software Restrictions Policy not working with %TEMP% variable

I'm trying to put in some meagre additional malware prevention measures, by restricting the execution of *.exe in a handful of locations -- in particular, the temporary folders that various ...
0
votes
1answer
18 views

AWS EC2: Secure configuration via IP access list

My company have a network with a fixed IP address/IP address range. Is it save when I configure my Security group that all traffic from this IP address will be accepted and everything else will be ...
0
votes
0answers
11 views

MYSQL error: IP address could not be resolved

My website is hosted with Linode, I installed webmin on Ubuntu 14.04 to manage it. Recently my database server keeps shutting down, when I look at /var/log/mysql, there are several log files in there ...
0
votes
1answer
23 views

How to make git forget my credentials

I am using GIT in windows. The repository stores my credentials and uses it for manipulating remote directory. For security reasons, I want to manually enter my credentials every time I do ...
0
votes
0answers
21 views

avoid data leak by block internet access for PCs, but allow internet access through remote desktop

In a small network(in my company), I would like to block some computers(PCs) to access the internet, so that sensitive data or files in those PCs can not be leaked. But I still need users of the PCs ...
-4
votes
2answers
45 views

Does it make sense to have a server dedicated to login? [on hold]

Since the login process itself involves an expensive hash, it also makes this part of any app vulnerable to (D)DOS attacks. Is it a good idea to put the login portion of the app on it's own dedicated ...
0
votes
1answer
219 views

TACACS+ configuration: how to receive priv-lvl value?

I need to configure TACACS+ server to know if the given user is authenticated* and what is his priv-lvl. As a client I'm using tactest (tacacs.net) and TACACS+ Client Java Library (AXL). I tried with ...
3
votes
2answers
2k views

windows 2008 R2 TS printer security - can't take owership

I have a Windows 2008 R2 server with Terminal server role installed. I'm seeing a problem with an ordinary user who is member of local printer operators group on the server. If the user opens a cmd ...
0
votes
1answer
1k views

How to enable connection security for WMI firewall rules when using VAMT 2.0?

I want to use VAMT 2.0 to install product keys and active software in remote machines. Everything works fine as long as the ASync-In, DCOM-In, and WMI-In Windows Firewall rules are enabled and the ...
3
votes
2answers
36 views

Does Active Directory send a user's access token across the network?

Question: does AD send a user's access token across the network? Research: The following two passages contradict themselves--given that TGTs are transmitted across the network by design. From the ...
0
votes
0answers
25 views

Web server got compromised (What to do next?) [duplicate]

My webserver got compromised (I think). The last 3 days inbound traffic spiked up to abnormal levels, in 3 days +/- 2.5TB of bandwith got used. when reading my access logs I see thousands of requests ...
0
votes
0answers
261 views

Glassfish 3 unable to deactivate SSL3 for IIOP

I'm running Glassfish 3.1.2.2 and want to disable SSL3 for the IIOP ports (default 3820 and 3920). I set configs.config.server-config.iiop-service.iiop-listener.SSL.ssl.ssl3-enabled=false configs....
0
votes
0answers
19 views

FTP server secured by denying write permission to chrooted home directory (virtual users) [closed]

I have a Pure-Ftpd server configured in a way that users have no write access to their ftp root directory. Instead user can write only to subdirectory created within its home dir (this subdir is ...
8
votes
3answers
809 views

Password similarity

I wanted to change my password on a unix machine. I did a normal "passwd" and typed in my old and my new password. Then the machine came back to me with the following message: BAD PASSWORD: is too ...
1
vote
3answers
1k views

How to find which local process is sending spam on a Windows Server 2008 server

I am managing a Win Server 2008 system with a number of hosted web sites. Recently I found that something was sending spam through our SMTP server. The logs indicate that the connections were being ...
-1
votes
1answer
22 views

Updating Ubuntu Webserver

Our webserver is on AWS running on Ubuntu 14.04.3 LTS. When I ssh into the server I see this message. 196 packages can be updated. 123 updates are security updates. Should I update our ...
0
votes
0answers
14 views

FTP file upload positive or negative file extension list

I'm setting up an FTP on IIS and I want user's to not be able to upload possible dangerous files based on file extensions. Now I'm uncertain if I should create a positive list to allow or negative ...
-1
votes
0answers
6 views

How safe are proxies if your IP could be cross-referenced? [migrated]

Let's say you're the NSA. And let's say you have "backdoor" access (for the sake of this discussion we'll assume that includes at a minimum the mapping of an IP address to a logged-in user) to Google. ...
0
votes
0answers
16 views

Tracking filesystem changes in runtime

I need to have program that tracks changes made to the file e.g. when I am installing software from supplied installer instead of packages. I do not want to checksum every file in filesystem because ...
1
vote
1answer
30 views

Security of SSL certs on AWS ELBs / SSL offloading

I have some concerns about security and am wondering how AWS will store an SSL certificate deployed to an ELB. I have a wildcard SSL cert for my domain that I want to make sure doesn't persist ...
0
votes
0answers
17 views

Arch Linux install without root password

Is it possible to install (and later maintain) Arch Linux (or some of its derivatives) without ever setting root password - using only user account and sudo? The same way it's done in Ubuntu and many ...
0
votes
1answer
53 views

Kali Linux Running in AWS

Normally I run Kali in a virtualbox VM however due to the nature of a project it may be useful to run Kali from an AWS EC2 instance. So imagine my joy when I learned there was a Kali AMI only to be ...
1
vote
1answer
93 views

Every website on the server redirects to a foreign page, even after clean install

First of all, this is my first time posting here, so sorry if I posted in the wrong section. To get to the point: I have a CentOS 7 + Gnome server, with VestaCP configured and running 2 WordPress ...
0
votes
1answer
23 views

How make Docker auto-survive kernel upgrades and restart?

Brief question: Docker, Ubuntu 16.04, auto-security-upgrades & reboot. Then how can I ensure the newest linux-image-extra-`uname -r` has been installed before Docker attempts to start the ...
1
vote
3answers
106 views

How to simulate a WORM environment w/Active Directory/NTFS

In NTFS/Active Directory, assume I have two drives mapped: H:\ I:\ Users can edit files in H:\, but not in I:\ . I want users to be able to, using a script, move their files to the I:\ drive unless ...
4
votes
2answers
1k views

How to set up two-factor authentication with OTP on FreeBSD?

I have a FreeBSD server that I like to be able to get to from anywhere. Normally I use SSH publickey to log in, or if I don't have my SSH private key available then I might use regular password over ...
0
votes
0answers
7 views

Is mod_evasive on ajax application a good idea, or will it block on false negatives?

I have a web application that injects content into the users page dynamically via ajax at the click of a button. A user may click the button multiple time in quick succession. In increasing the ...
0
votes
1answer
22 views

Integrating Web Application Firewall into this architecture

I need some help figuring out how to implement a Web Application Firewall (WAF) in my existing architecture. Currently I have 2 HAproxy servers clustered using keepalived which are responsible for ...
4
votes
2answers
3k views

Windows 2008 R2 Server Security Log filling with event 521

I understand that status code 0xc0000008 means Invalid Handle. How do you resolve this issue (besides a restart)? What is the best way to determine the cause for this? Log Name: Security ...