vulnerability of Linux
by 198mdk＠oninet.pt
"Linux may not be as vulnerable as Windows, but if you think Linux viruses don't exist, you'd better think again. Virus writers have any number of possibilities"
I have just read this sentence and I'm concerned because I have only firewall(from router a from FC4) working on FC4. Could you explain to me wich actions I should take? Note: I have Toshiba laptop, FC4, Gnome and Thunderbird. The only programs I know are Clamav and Spamassassin. Is it enough? Although I know FC4 has SELinux. Best regards, Joao.
18 years, 6 months
Linux newbie question: problems using XDMCP to remotely start KDE session from a Windows PC
by Jason M. Dolinger
Hi all,
I am brand new to the Unix/Linux world, just started taking the
plunge. First of all, please forgive me if this is not the
appropriate place to ask such questions...
I just installed Fedora Core 4 and have been playing around with it
for several weeks now. I also have a Windows XP machine connected to
the same router as the linux box. I'd love to be able to do
everything from one machine, therefore setting up an X server on the
windows box to run X programs and have them appear on my windows
machine. I downloaded Xwin32 and have been able to do what I just described.
However I'd like to take it to the next level and be able to popup
the entire KDE desktop on my windows machine. I believe that the way
to do this is using XDMCP, and then Xwin32 is only remotely managing
the KDE session running on the Linux PC. However, upon trying to use
the XDMCP option in Xwin32 to connect, my entire Windows desktop
turns grey, with a slightly linux-y looking mouse pointer, but
nothing ever happens. I need to Alt-tab to get back to any of my
other windows programs. Has anyone ever seen this before?
A few things:
1. In the KDE Login settings (I believe that runs gdmsetup), I've
checked "Enable XDMCP" on the XDMCP tab (I'm using the SAMS Red Hat
Fedora 4 book and it led me to believe that this is all I would need to do).
2. I've edited /etc/X11/xdm/xdm-config to comment out the line
"DisplayManager.requestPort: 0". I added a "!" in front of that line.
3. I've edited /etc/X11/xdm/kdmrc to change the line "Enable=false"
to "Enable=true" under [Xdmcp]. Both this step and step 2 I found
from various internet postings and thought I'd give them a try.
4. On my network, my windows PC gets a dynamic IP address from my
router and I configured the Linux machine to use a static IP. I've
set up Xwin32 to connect to Linux using it's IPaddress, and the
Xwin32 configuration specifies the IP address of the windows machine
to route its display back to. Both machines can only ping each other
using their IPaddresses, not hostnames (I've nothing set up in the
host files for either machine).
Between each configuration steps 1, 2 and 3, I restarted the Linux
machine (the postings mentioned restarting just X, but I didn't know
how to do that. They actually mentioned restarting the X server, but
that didn't make sense to me. Isn't the Xserver what is running on
my Windows PC, but I made the changes on the Linux side? I thought I
would need to restart whatever is running on the Linux side, is that
referred to as the X client?).
Well, that's really it. Have I missed a magic step somewhere along
the line, or is the problem more complicated, related to my
hardware/firewall setup perhaps (I tried this while disabling my
Windows firewall, no luck)? At this point, I'm not really sure if
the issue is the Linux configuration, my network or the X server
configuration on my PC. Maybe a different X server (CygwinX
perhaps?) would give me better luck?
Sorry if this is such a basic thing, I really am just barely starting
to figure this thing out.
Thanks, any help would be appreciated!
Jason
18 years, 6 months
Re: Automatic email relay agent?
by Hongwei Li
> probably the best way to handle the "travelling user" need is with
> smtp-auth -- where the sending client authenticates.
>
> look at/for the following lines in your sendmail.mc
>
>
> dnl # The following causes sendmail to additionally listen to port
> 587 for
> dnl # mail from MUAs that authenticate. Roaming users who can't reach
> their
> dnl # preferred sendmail daemon due to port 25 being blocked or
> redirected find
> dnl # this useful.
>
>
> the concept of temporarily adding a random/dynamic ipnumber isn't
> very good as it open a (admittedly probably small) window that might
> be able to be used by a spammer type should they come upon it.
>
Thank you very much for the help! I uncomment the line
DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
but, I have a question: if outlook express does not use port 587, then what to
do? How to make sure that if outlook express finds port 25 blocked, it will
try port 587?
What about the other line
dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
does that help if it is uncomment too?
Thanks!
Hongwei
18 years, 6 months
unexpected DNS look ups being logged
by Tim
Hi,
I see things reported in logwatch that I don't expect. For instance,
named reports resolving addresses that are part of spams I'm receiving.
However, I'm not using spam filtering, I'm not loading HTML with images
that might contain web bugs (and these spams were plain text, anyway),
so I didn't expect Evolution to go checking on the addresses.
Anybody else see the same thing, or can explain it?
Thanks.
--
Don't send private replies to my address, the mailbox is ignored.
I read messages from the public lists.
18 years, 6 months
FC4 - KVM mouse needing reset
by Doug Coats
I have a number of FC4 boxes set up as servers hooked up to a KVM
switch. Every once in a while when I go to use them at the machine
the mouse is messed up. It moves sporadically and acts as though I am
clicking on things that I am not.
Is there any way to reset the mouse from the command line without
rebooting the machine? Thanks for your help!
Doug
18 years, 6 months
How to autologin as a superuser
by harshavardhanreddy mandeepala
hi
I am using Linux fedora core 3.
How can i autologin as a superuser (root).
i am able to autologin as a non-root user but not as a root.
i can hande the security issues if i can autologin as a root.
so if u know the solution mail me to hvreddy11110(a)gmail.com
thanks in advance.
Regards
M.Harshavardhan Reddy
18 years, 6 months
Re: ssh & port 22 problem
by Stewart Nelson
> When I try to connect from a remote machine to my one at home
> using ssh I get the error message "ssh: connect to host 64.146.133.1 port
> 22: Connection refused" -- but using ssh in the outgoing direction (i.e.
> from home to the remote location) works fine. Any suggestions as to how
> to troubleshoot this?
Hi Jerry,
I looked at your IP to see what kind of router you had.
It appears to be supplied by your ISP, because telnet showed:
Sawtooth Technologies, LLC Stevenson, WA Unauthorized Access is Prohibited
gw-sawtooth.pdx.rain.net 98.10.20-0 For Service Call +1 509 427-4865
Sawtooth Technologies Ether 204.119.0.254 PL/DHGL/109201/ELG 204.119.4.30
So you may need to call them to get the password or to forward port 22
for you.
--Stewart
18 years, 6 months
FC3 rpm of Skype on FC4
by Paul Smith
Dear All
Does the rpm of Skype (online at its website) for FC3 work fine on FC4?
Thanks in advance,
Paul
18 years, 6 months
