Security :: Laptop Wifi Security In Public Library?
Jul 8, 2010
I recently got a nice, lightly used IBM Thinkpad laptop. It has wireless capability for the Internet. Linux is the only OS in the laptop. At home, I don't have wireless-- I have a wired DSL connection for my laptop and for my IBM desktop (which also only has Linux as OS).
When I took the laptop to the public library, wireless is provided there for free and I had no trouble connecting to the system there. But since I'm new to wireless, what do I need to have installed to have a secure laptop when in the public library (or when I'm anywhere else that offers free wifi) using the wireless connection? [I use Firestarter as my firewall in the laptop and in the desktop.] Do I have to install some software to make sure my laptop is secured from spying and invasions when in the library or is the Firestarter enough? If Firestarter is not enough, what is that wifi security software by name?
[My OS is MEPIS 8.5, a Debian-based distro.]
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May 8, 2011
I'm concerned about security of having a LAMP server on my laptop as having any server makes the system less secure. However, if I were to create a new partition and install a lamp server on that and only use it when offline, would the security of my main partition be affected at all?
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Mar 7, 2010
I am trying to figure out the best way to set up 1-1 NAT for three public ips to three private ips through a ubuntu gateway machine.
I am running ubuntu server 9.10 and the set up is:
Internet/ISP modem -> NIC 1 Ubuntu Gateway Machine NIC 2 -> Three PCs with Private IPs
I had a few questions on how to do this correctly and securely.
1) What packages do I need to install (aside from the basic ubuntu server installation and possibly DHCP3-Server)
2) How do I assign all three public IPs to the NIC connected to the ISP modem? All addresses will be static, will I need the DHCP3-Server package?
3) Once I have the three public IPs assigned how do I map each specific public IP to the private IP address associated with it and provide the correct loopback? I want to make sure each response from the internal machines are sent out as their specific public IP.
4) Aside from allowing all connections, how should IP tables be configured to allow web services to one internal machine, mail to another internal machine and DNS to the other internal machine?
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Jun 6, 2011
I've got a p12 certificate (I own the secret key), and I would like to export the public key to gpg keyservers. How to achieve this?It works flawlessly inside gpgsm and kleopatra, but I cannot send keys:
Code:
$ gpgsm --send-keys 0xDA4E5DD0
gpgsm: this command has not yet been implemented
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Dec 2, 2010
looking at my router logs i've noticed for the past while a range of source ports from 60000 to about 65000 from my source external ip to destination external ip always on port 80. I have 3 boxes on this network and this only seems to happen when i connect the one laptop. I even reinstalled the distro downloaded from trusted source but the router is still logging this.. netstat -ntulp shows nothing operating in this range. chkrootkit shows nothing.. Was thinking maybe someone was spoofing the external address but it's been happening on network startup for a month now
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Oct 18, 2010
I have an encrypted document (with my key) which I should decrypt. After the generation of my key, my computer is formated and new reinstalled. Now GnuPG find my key public and I can't use it for decryption!
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Jul 22, 2010
I have to make sym link of phpmyadmin in /var/www in order to run phpmyadmin. I read that links can't be chmod-ed. The link ot folder phpmyadmin has 777 permissions. When browse in it every file has only read and for the root read/write access.
Is that a problem (777 access rights on sym link phpmyadmin on /var/www folder)?
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Sep 8, 2010
I can't get this to work on my machines.
So far I have:
1. created a key with ssh-keygen on the server to be logged in to
2. copied the .pub key to my local machine
3. chmod 700 ~/.ssh on both machines
4. chomd 600 ~/.ssh/ic_rsa on the server, and on known_hosts on my local machine
5. added the .pub key to ~/known_hosts on my local machine
my local machine doesn't have an "authorized_keys" file which is what everything is telling me I should append my .pub key to. The only thing that was in my .ssh folder was known_hosts, so I tried that. I also tried making an authorized_hosts file to no avail, changing permissions appropriatly on all files.
Should I/Can I reset ssh in some way? Is there are reason I don't have an authorized_keys file or is my known_hosts file my authorized_keys file?
Would it be better just to uninstall/reinstall ssh?
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Jul 17, 2011
how safe is it to run Ubuntu updates when I'm connecting via a public network (wireless or wired) from a hotel (or other public settings). I'm not familiar with the internals but is there an additional validation mechanism for the package servers other than the URL ?
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Mar 24, 2010
I have trouble with rsa authentication:
I did create an rsa certificate with ssh-keygen using my root account on a client: ssh-keygen -t rsa -b 2048 no passphrase I did copy the rsa pub_key from my client to the server scp id_rsa sampleuser@sampleserver:/home/sampleuser/.ssh/authorized_keys
I did change the ownership to the "sampleuser" of the pub key file on the server: I trayd to connect:
ssh sampleuser@sapleserver
I get that: permission denied (public key)... I know I do smth wrong but I don't know what.
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Feb 18, 2010
In my ~/.ssh I have a number of public keys and one private key (id_rsa). How can I verify which one makes a pair with the private one.Or, can one generate the public one from the private key (in reasonable time)?
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Mar 26, 2010
At the moment we have one SSH server with the private key being on a usb flash drive, and the public key being on the server in authorized_keys2. Now that three more servers are coming online, should we generate new keys, so we have muliple private and public keys (one pair for each server), or use the same two keys to access all the servers
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Mar 31, 2010
I am using Nautilus to connect to an external server. Currently, I use password authentication, and all works fine. I just type sftp://SERVER and the connection is established after providing the login credentials. However, I changed the server to only accept Public Key Authentication and disabled password authentication, and as a consequence I could not login using Nautilus anymore. Is there some way to make this work?
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Aug 26, 2010
I have a problem with my ubuntu account. I am running 4 virtual machines, based on jeos-8.04 and I am using a public key authentication to login to my account (via ssh). This is not the problem, I have the key and the passphrase. But when I am logged in, I can't sudo, because I forgot the password for the accout.
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Nov 4, 2010
I'd like to know if this is common security flaw or normal to open up FTP to the public which is of course protected with password for 3rd party access to maintain our public facing / production website ?
If yes, what sort of FTP application to install in Ubuntu ?
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Jan 13, 2011
Our local community wants to provide broadband access for people who don't own a computer. I have been given the task of setting this up and I am going to use Ubuntu. Internet access will be via a usb dongle to a T-Mobile 3.5g network. Initially we are intending to limit access to just Internet browsing. Most users will probably be older people, rather than teenage hackers. configuring/securing a default Ubuntu install for this sort of use.
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Feb 14, 2011
Within the documentation of example OpenVPN setups there is a setup that shows an OpenVPN Server with two network interfaces. One interfaces is plugged into the public internet network and the second interface is plugged into the private network.
Normally I assume that it would be best to place the OpenVPN system inside the network behind the router and firewall and open only the ports needed on the router to allow access to the OpenVPN system. All other router ports would be closed. This is the first example they show. To see what I am talking about see page(s) 6-7 here -> [URL]
If one were to use the two interface public facing setup, when would that setup best be justified? I guess if you didn't want to open any ports on the router/firewall then this could be justified but then you have to lock down this public system individually instead of having it protected by the network firewall.
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Apr 8, 2010
I've been looking awhile now, but no patch for this is yet to be found. Does anyone have more info, or better, a fix? Last version from GNU's ftp server is also vuln as of this writing.
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Mar 13, 2010
I'm trying to find a secure way to backup files on my Prod Server to Backup Server. It must be automated, so I will need to run a command with cron which will login to Prod Server from Backup Server and backup data. 1. Do you think it would be secure enough to do this by creating an passwordless RSA private key on Backup Server and adding it's public key to authorized_hosts file on Prod Server? I can't think of a way to Automate this without having to enter any passwords without passwordless RSA key. Is there another. more secure way? 2. Should I create a special user for backup, which will only have read access to all files in the directory that I am backing up? If so, How can I run a check that this new backup user indeed has read access to ALL files in the folder that I intent to back up? How can I ensure the backup process will not skip files due to some permission problem? 3. I'm thinking of using rsnapshot tool, which uses rsync.
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Nov 4, 2010
I'd like to know if this is common security flaw or normal to open up FTP to the public which is of course protected with password for 3rd party access to maintain our public facing / production website ? If yes, what sort of FTP application to install in your Linux webserver?
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Apr 20, 2010
I just installed it by following steps in [URL]
but when I run "msfconsole", I got the following error messages telling me that ruby-openssl is not installed. I installed it "apt-get install libopenssl-ruby" but same message still comes again. I'm running Ubuntu 9.10.
root@qa-ud910-32-1:/opt/metasploit3/msf3/external/ruby-lorcon2# msfconsole
*** The ruby-openssl library is not installed, many features will be disabled!
*** Examples: Meterpreter, SSL Sockets, SMB/NTLM Authentication, and more
[-] ***
[Code]....
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Apr 16, 2010
I need to write program (preffer Python) to change range for users. Does anyone know some library which can help me to do that? Maybe someone has written program like that?
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Nov 2, 2010
no more open wifi -- fire sheep make hacking open wifi a breexe.starbuck and Micky d's are open to the fire sheep.
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May 13, 2009
the only error message I can find comes from "dmesg|tail"all it shows is
"no IPv6 router"any body know what is going on here or where where to look for more clues the next time I get around public wifi Oh the windoze washers and apple polishers don't seem to have any problems at all
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Jun 18, 2011
I wish all of my Internet connections will go through a proxy server. HTTP as well as FTP, and every other type of link. How can i do that?
On top of that, is there a free ubuntu-users' public proxy list?
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Apr 19, 2010
I am new to Ubuntu and till now I have chosen it to be my favorite distro. I use my laptop in various networks, home, work, school. When I run firestarter the wizard does not give me the option for wireless INTERNET, only ethernet.
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Apr 2, 2011
Whilst my office is decorated I have to move my computer. To make this as easy as possible I have setup my first ever wifi. An access point (wired to adsl router). It is working by using wicd and I am wireless at the moment. What security should I put in place (wicd says unsecured). I am probably quite safe as the nearest road or house is 200m away but I would like to learn what I need to do as this is the first time in over 20 years of computing that I have gone wireless.
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Jan 14, 2011
I just set up my ubuntu 10.10, which boot up by usb drive,
and I found a problem that I can't get my internet when I was
sitting in a public library. The firefox show me every website is
untrust. Normally, when first connect to this network, I need to
accept a library contract on webpage, which called spyder.local.
Does anyone could fix it? or there is something related to the
firefox setting. I currently keep every setting by default
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May 4, 2010
The wifi is not working for me. The scan detects the wifi signal but fails to connect. The wifi I have requires WEP authentication, even if I give the right passphrase it fails to connect. The problem is happening in SUSE 11.2 installed in HP dv7-3065dx laptop.
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Feb 15, 2011
I got a laptop as garbage from my company. I would like to buy an pcmcia lan card in order to use it as the first hop of my double hop firewall. I will connect this lap to my providers modem with the on board port and connect my wlan router to the second port,on the pcmcia card,which shall serve as the second hop. I have read about smoothwall as os for my lap and it sounds good.But i would like to have a monitoring of each packet, whether in or out. So i will have to install an x ui. I prefer fvwm.2. Does anyone have such a paranoid setting?
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