Tagged Questions

0
votes
1answer
46 views

How are IaaS Virtual Machines Isolated?

I am currently examining Hypervisor firewalls for my graduate thesis, but I unfortunately don't have a lot of experience with IaaS environments. How are IaaS Virtual Machines network isolated from ...
-4
votes
0answers
61 views

Remotely Accessible Security Camera [closed]

I hope this question meets you well. I am trying to set up my computer TOSHIBA NB305-N310 to be able to be remotely accessible while the camera is recording video to an external hard drive. The ...
2
votes
2answers
77 views

any reason not to run tmux/wemux on a bastion host?

Is there any reason to worry about running tmux/wemux on a bastion host? It seems to me that it would open up vectors to have your terminal sessions hijacked by some locally exploited account on the ...
3
votes
5answers
153 views

Blocking network access to host(s) at the kernel level in Linux?

Getting it out of the way: Not iptables! What I'd like to do is block network access to certain IPs, subnets, and/or hostnames at the Linux kernel level, such that no user, including root, could ...
2
votes
1answer
200 views

Tacacs+ scenario: can I permit user to configure only for one interface and deny others

I'm currently deploying TACACS+ with a Cisco device, I use a TACACS server from here: http://www.shrubbery.net/tac_plus/ My scenario is: I want to permit a user to configure my router but only for a ...
1
vote
1answer
48 views

Does pppd encrypt traffic?

There is pppd program that can be used to create point-to-point conections over various channels (including other network). It supports authentication and compression. But does it encrypt traffic or ...
5
votes
2answers
1k views

Is it possible to use the aircrack-ng tool to crack a WPA2 Enterprise network?

is this tool (aircrack-ng) capable of cracking into a WPA/WPA2 Enterprise network? This tool has major success cracking the passwords of WEP/WPA networks. If it can, how, but if not, is there another ...
5
votes
1answer
4k views

TCP Peer unexpectedly shrunk window messages in dmesg log

We get quite few messages like these in our dmesg log on various servers. TCP: Peer 0000:0000:0000:0000:0000:ffff:d431:5861:56369/80 unexpectedly shrunk window 2522304441:2522312601 (repaired) TCP: ...
5
votes
2answers
334 views

How can I use nmap to distinguish between a normal linux machine and an android device?

According to this link: here, nmap 5.2 onwards is now supposed to detect android smartphones. I am using nmap 6.01 but it only identifies android devices as running a linux kernel.
2
votes
2answers
2k views

IPTables DDoS protection working with per client IP address counter AND UDP

I am looking to protect LAMP server with a software, which will detect above average number of requests from single IP numbers (in this case DNS queries), and add these hosts to IPTables deny chain. ...
2
votes
1answer
90 views

Network abnormally slow during night hours

My network recently the last week as become abnormally slow around 11 pm. Very slow buffering youtube videos during all hours. Ive recently purchased the new router about two months ago but not ...
0
votes
0answers
238 views

Using more multiple VPN client's to connect to the same CISCO ASA VPN client connection [closed]

I am currently using CISCO VPN client in a Read Hat Linux machine to connect to a CISCO ASA. I am planing to connect another LINUX maching to the same ASA using the CISCO VPN client. Does any ...
10
votes
3answers
656 views

VPS security best practice

I've just signed up for a linux VPS to host a website I've been creating and I need some advice on the best approach to secure it. I've previously been hosting it off a VM in the house, but I want to ...
1
vote
1answer
295 views

Should Windows 2008 R2 be used as an externally facing DNS name server?

When compared to more traditional DNS name servers, what are the benefits / drawbacks of using a Windows 2008 R2 as a public ns record for a company. What limitations, or security issues would I ...
11
votes
2answers
327 views

Network policies under AppArmor/SELinux

I am attempting to sandbox some untrusted processes using Linux's MAC frameworks -- either SELinux or AppArmor. I see that both SELinux and AppArmor allow the selected granting of socket level access ...
4
votes
4answers
10k views

Tips for a secure iptables config to defend from attacks. (client side!)

Own examples: ############### # KERNEL PARAMETER CONFIGURATION # PREVENT YOU SYSTEM FROM ANSWERING ICMP ECHO REQUESTS echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all # DROP ICMP ECHO-REQUEST ...
5
votes
4answers
156 views

software to keep a list of IP that try to access ssh over a set of rules and feasibility

i'm interested in software or set of scripts to keep a lists of filtered IP that attempt to brute-force ssh, and to label an IP as brute-forcing i would add some checks like: one attempt to log as ...
0
votes
2answers
2k views

IPTables default security rules for a gateway/router?

On a router such as dd-wrt or tomato, what would be some default iptables rules? I am asking for rules on a router/gateway - For example; blocking SYN flood attacks, or XMAS attacks. The basic ...
3
votes
1answer
410 views

Firewall rules to block unwanted protocols on given ports

Does somebody has an idea, that what kind of iptables/pf rule must i use to achieve this?: i only want to allow these connections [on the output chain]: on port 53 output only allow udp - dns on ...
6
votes
2answers
302 views

What features do you look for in an Enterprise Log Management solution?

This question is for IT Pros, and people who manage a company's infrastructure. Developers should see this related answer for tools geared for them. What are your requirements for such a Event Log ...