Linux-Networking Digest #729, Volume #11 Wed, 30 Jun 99 11:13:44 EDT
Contents:
I need help setting up my network. (Travis)
Re: Connecting to ISP (Clifford Kite)
Re: running "off-line" cgi ? (Olivier Sessink)
POP3 proxy traversal (Tage V. Madsen)
Re: Why not C++ (Stephan Houben)
Re: Linux routing (Kyle Bedell)
Re: Why not C++ (Basile STARYNKEVITCH)
Re: Banner after print job. ("Daniel Wagner")
Re: WIN95>LINUX>WIN98>NT4Proxy? (Jonathan Guthrie)
"invalid password" (Win95) using samba ("Bart")
Re: DHCP Daemon.. ?? (Wouter Liefting)
WebCam & Linux? (Bachir Djafri)
Re: Private DNS useless?? (Wouter Liefting)
Automount of SMB Filesystems (Jack Holt)
Re: change TcpWindowSize ? (Wouter Liefting)
Re: Automount of SMB Filesystems (Timothy Kelley)
can't ftp/telnet as root (Ron Bombard)
PPP and win95 dailin ("J. 'FIK' Brand")
Net tools for 2.2.9? (Stephen Davies)
Re: Proxim Symphony (Albert C. Lee)
Re: phoneline/wireless networking drivers (Albert C. Lee)
Re: Very Slow Network - 'pings' out of sequence (Wouter Liefting)
Re: Cluster management - software?? ([EMAIL PROTECTED])
Re: Preventing inbound packets w/ ipfwadm (Bob)
----------------------------------------------------------------------------
From: Travis <[EMAIL PROTECTED]>
Subject: I need help setting up my network.
Date: Tue, 29 Jun 1999 20:39:50 -0400
I setup my 2 linux boxes with the following command:
# ifconfig eth0 192.168.42.x
Where x is 1 for the first linux box (Linux1) and x is 2 for the second
box (Linux2)
My question is:
1. If Linux1 is my server do I have to setup a DNS server?
2. If I have to setup a DNS server where can I get info on setting it
up?
3. Do I have to set up the computers to be Linux1(2).hostname and
Windows1.hostname? Or can I set them up to just be Linux1(2) and
Windows1
I am going to install Samba support so I can connect to my Windows 95
computer and my Windows 3.1x computer.
I am also planning on installing IP Masquerading.
------------------------------
From: kite@NoSpam.%inetport.com (Clifford Kite)
Subject: Re: Connecting to ISP
Date: 30 Jun 1999 06:59:10 -0500
Tomm Prickett ([EMAIL PROTECTED]) wrote:
: This is a multi-part message in MIME format.
: --------------897C7D194D2495105C209491
: Content-Type: text/plain; charset=us-ascii
: Content-Transfer-Encoding: 7bit
: Very new to Linux (Red Hat 5.0) (but old hand with UNIX). I got a modem
: to dial-out to my ISP using minicom, but after entering userid and
: password, nothing but heiroglyphics, then "NO CARRIER." Any suggestions
: would be greatly appreciated.
: ([EMAIL PROTECTED])
Here's some help for the "problem":
http://axion.physics.ubc.ca/ppp-linux.html
And please don't post to newsgroups in html.
: --------------897C7D194D2495105C209491
: Content-Type: text/x-vcard; charset=us-ascii;
: name="prickett.vcf"
: Content-Transfer-Encoding: 7bit
: Content-Description: Card for Tomm Prickett
: Content-Disposition: attachment;
: filename="prickett.vcf"
: begin:vcard
: n:Prickett;Tomm
: tel;pager:888-582-6708
: tel;fax:630-260-4199
: tel;work:630-260-7167
: x-mozilla-html:FALSE
: adr:;;;;;;
: version:2.1
: email;internet:[EMAIL PROTECTED]
: end:vcard
: --------------897C7D194D2495105C209491--
--
Clifford Kite <kite@inet%port.com> Not a guru. (tm)
/* Microsoft is a great marketing organization.
* It _has_ to be */
------------------------------
From: Olivier Sessink <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.help,comp.os.linux.development.apps,comp.os.linux.admin
Subject: Re: running "off-line" cgi ?
Date: Wed, 30 Jun 1999 22:30:17 +1000
David wrote:
>
> I would like to create an offline database and a search engine on Linux,
> with output in HTML interpreted by Netscape.
>
> Is it possible to run CGI scripts on a non-connected machine ?
> Do I need to configure HTTPD ? Modify usr/bin/perl, if I use Perl
> scripts ?
what about running it like:
./yourscript.cgi > /tmp/output.html
netscape /tmp/output.html
cu,
Olivier
___________________________________________________
) Olivier Sessink
(( _ Email [EMAIL PROTECTED]
|~~~| )
| |' Working without coffee is like driving without fuel
`---'
------------------------------
From: Tage V. Madsen <[EMAIL PROTECTED]>
Subject: POP3 proxy traversal
Date: Wed, 30 Jun 1999 12:27:24 GMT
Hi
I'm wondering if there is a de facto standard for POP3 to traverse a
proxy/firewall directly, i.e. without a router.
There is nothing mentioned in the POP3 RFC, but I know that WinGate
supports a notation of username#mailserver.com, meaning that you set up
the POP3 client to connect to the WinGate server, and then use
username#mailserver.com for username.
Is that supported by other proxys/firewalls aswell?
Tage V. Madsen
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.
------------------------------
From: Stephan Houben <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.development.apps,comp.os.linux.development.system
Subject: Re: Why not C++
Date: 30 Jun 1999 14:39:51 +0200
[EMAIL PROTECTED] (Nathan Myers) writes:
> Johan Kullstam <[EMAIL PROTECTED]> wrote:
> >actually i don't mind the templates in C++. they are rather weak, but ...
>
> FUD, again. C++ templates are not weak. They allow construction of
> libraries that cannot be constructed in any other language.
Templates in C++ solve a problem that simply doesn't exist in most other modern
programming languages. The fact that it exists in C++ is due to the fact that C++
is based on C.
Languages like C and Pascal are "strongly typed", which basically means that when I
have
a function that squares an int:
int square(int x)
{
return x*x;
}
,then this function cannot square floats. In order to square floats, I have to define
a new
function with almost identical code:
float square(float x)
{
return x*x;
}
Now, this problem doesn't exist in dynamically typed programming languages like Python,
since there you would do:
def square(x):
return x*x
,and the type of x only plays a role at run time (when the correct * operation has to
be selected).
In other programming languages, e.g. Haskell, you *do* have typing, but there
types can be more general, i.e. the following definition:
square x = x*x
would be automatically typed by the compiler as being of the type
square :: (Num a) => a -> a
, implying that square is a function taking some value of an type a and producing
a value of the same type, where a may be any type of type class Num, which means that
a * operation has to be defined on a.
Now both these options are much less cumbersome than the C++ way of doing things;
moreover, in the Haskell way, you *do* get static typing with all the advantages
(more efficient code generation, compile-time error checking).
IMHO, C++'s templates are a useful hack to repair a basic flaw in C's type system.
However, there are certainly much more elegant solutions.
Greetings,
Stephan
------------------------------
From: Kyle Bedell <[EMAIL PROTECTED]>
Subject: Re: Linux routing
Date: Wed, 30 Jun 1999 07:58:51 -0400
[EMAIL PROTECTED] wrote:
> I've the following Problem:
>
> We have a internet connection via LAN; It works with DHCP and there is
> only one card (hw-adress) allowed.
> But we have more PCs connected via ethernet and TCP with 10. IPs.
> Now there is a second card in the linux-PC. One gets over DHCP the
> connection to the internet and the other works with ip 10.10.10.20
> intern.
>
> Does somebody know how to set the routing, so that we can reach the
> internet from the other PCs an use the linux for routing???
>
> thanks
>
> Thomas
Hi Thomas
I have half an answer for ya as I too am just now visiting here to learn
the networking config for RedHat 6 and I am doing what you are, in that I
have the @ home service and they do not support home LANS (your'e on your
own they say) Its painffully easy to do though, I've just not done it in
Linux because Im just starting linux.. I know this much: you must
configure each device in the /etc/sysconfig/network-scripts/ifconfig eth0
and eth1 respectively and, in addition, you must enter all hosts on you
network in the /etc/hosts file. eth0 and eth1 are your interface
devices. Im not clear on how to identify which device is which (i.e. if
you have two different cards it will be easier to tell them apart vice 2
identical cards) Your address of 10.10.10.20 should be assigned to the
INTRAnet (your LAN) NIC card and that (static) address will be the
default gateway address each of your client machines will use in
accessing the Internet. You must configure each client accordingly. I
just thought fo something regarding the setup of eth0 and eth1,.... do
one and then add the other later.
I am using Rogers@home with DHCP, but my IP has remained the same since
signing on. I would advise though that you do not use 10.10.10.20 if
these machines are to access the internet as it may cause ARP
confilicts I can tell you that when I set up a 6 host-Win 98 Home Lan,
I HAD BIG PROBS using 10.10.10.** . I would recommend that you use
something like 192.168.0.** (cl B address ) Once I did that I had a
happy LAN :) .
Unfortunately that's all I have for ya, I'm pretty sure there are a
couple things here that I'm missing. (Due to lack of experience) but the
aforementioned instructions are for sure. If you find out more me know
would ya? greatly appreciated and in turn if I find out more I will post
it here
TTYL and I hope this is of some use to ya
Kyle Bedell
------------------------------
From: Basile STARYNKEVITCH <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.development.apps,comp.os.linux.development.system
Subject: Re: Why not C++
Date: 30 Jun 1999 13:39:33 +0200
>>>>> "Nathan" == Nathan Myers <[EMAIL PROTECTED]> writes:
Nathan> FUD, again. C++ templates are not weak. They allow
Nathan> construction of libraries that cannot be constructed in
Nathan> any other language.
I believe this is false. For example, the functor (ie module
templates) of Ocaml are at least as powerful than C++ templates.
I don't known (yet) very well other functional languages, but it may
be possible that SML97, Clean, Haskell, Erlang, Mercury, Godel, ...
have equally powerful features.
I beleive looking into comp.lang.functional FAQ might be useful.
Ocaml is more and more used, even in industrial context. See
"http://caml.inria.fr/ocaml/" for details
If you reply to me, please remove ANTISPAM from reply address.
N.B. Any opinions expressed here are only mine, and not of my organization.
N.B. Les opinions exprimees ici me sont personnelles et n engagent pas le CEA.
=====================================================================
Basile STARYNKEVITCH ---- Commissariat � l Energie Atomique
DTA/LETI/DEIN/SLA * CEA/Saclay b.528 (p111f) * 91191 GIF/YVETTE CEDEX * France
phone: 1,69.08.60.55; fax: 1.69.08.83.95 home: 1,46.65.45.53
email: Basile point Starynkevitch at cea point fr
------------------------------
From: "Daniel Wagner" <[EMAIL PROTECTED]>
Crossposted-To: alt.os.linux,comp.os.linux
Subject: Re: Banner after print job.
Date: Wed, 30 Jun 1999 13:58:10 +0200
Hello!
Perhaps a look into /etc/apsfilterrc may help, of course only if you use =
apsfilter.
Daniel.
--=20
Java rulz! Linux rulz!
Registerd Linux User #65688
E-Mail: mailto:[EMAIL PROTECTED]
ICQ: 41472160
WWW: http://www.computer.privateweb.at/daniel.wagner/
Tozz schrieb in Nachricht <7lcfk4$6i$[EMAIL PROTECTED]>...
------------------------------
From: Jonathan Guthrie <[EMAIL PROTECTED]>
Subject: Re: WIN95>LINUX>WIN98>NT4Proxy?
Date: 30 Jun 1999 13:10:17 GMT
eldee <[EMAIL PROTECTED]> wrote:
> Is this Possible? Can I hook up our office computers running Win95 to a
> Linux box running Apache & Samba, then connect the Linux box to a Win98
> box running Wingate, which in turns connects and has an account on the
> NT4 Proxy the company is running to access the Internet?
> It sounds painful just repeating it, does anyone out there think it's
> actually possible to do?
>From Linux's perspective, all you have to do is set the gateway to the IP
address of the box running Wingate. The critical thing for the success of
this scheme is the configuration of the Win98 box. Unfortunately, you've
asked on the wrong newsgroup for that. ;-)
--
Jonathan Guthrie ([EMAIL PROTECTED])
Brokersys +281-895-8101 http://www.brokersys.com/
12703 Veterans Memorial #106, Houston, TX 77014, USA
------------------------------
From: "Bart" <[EMAIL PROTECTED]>
Subject: "invalid password" (Win95) using samba
Date: Wed, 30 Jun 1999 14:09:32 +0200
I guess I'm faced with a "classic" problem, yet as a newbie I don't know how
to solve it :-(
Here it is:
Samba is up and running.
I log in on my Win95 machine [" client for Microsoft network" as primary
network logon] using the same username & password as I have for Linux on my
other machine.
On my Win95 machine [network neighbourhood], I can see the shared folders.
Clicking on them, I'm asked for the password. I fill in the password, and
get an error-message saying that the password is incorrect...
In my smb.conf file I have (among other things, but these seem to be
important)
security = user
encrypt passwords = yes
I'm really new to this stuff, so any hints are appreciated and thanked for
in advance.
B@rt
------------------------------
From: Wouter Liefting <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.setup
Subject: Re: DHCP Daemon.. ??
Date: Wed, 30 Jun 1999 16:34:25 +0430
Reply-To: [EMAIL PROTECTED]
Robert Daumann wrote:
> Take the tool Webmin - it's runnung with a browser - www.webmin.com
Doesn�t kill -HUP <PID of DHCPD> doesn�t work anymore nowadays?
- Wouter.
>
>
> {MoosEMaN} <[EMAIL PROTECTED]> schrieb in im Newsbeitrag:
> R69e3.169$[EMAIL PROTECTED]
> > ...just installed and am successfully running DHCP
> >
> > when I modify /etc/dhcpd.conf to add static IPs they only take affect
> after
> > I reboot the server...
> >
> > how do I restart teh dhcp daemon without rebooting?..
> >
> > thanx
> >
> >
> >
> >
> > --
> > Daniel Tatone , Network Analyst
> > Webcam: http://mooseland.montreal.qc.ca/webcam ICQ: 843922
> > Personal HomePage: http://www.richterit.ca/mooseman
> > e-mail @ Work: mailto:[EMAIL PROTECTED]
> >
> >
> >
------------------------------
From: Bachir Djafri <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.development.apps
Subject: WebCam & Linux?
Date: Wed, 30 Jun 1999 14:34:08 +0200
Hello,
I have a WebCam (pc camera) and want to
know how to use it with Linux?
Does anyone know how to do?
Thanks in advance.
Bachir.
------------------------------
From: Wouter Liefting <[EMAIL PROTECTED]>
Subject: Re: Private DNS useless??
Date: Wed, 30 Jun 1999 16:07:56 +0430
Reply-To: [EMAIL PROTECTED]
Nicholas E Couchman wrote:
> I would say yes, especially if you are tired of typing IP addresses. I
I would say no. /etc/hosts is much easier to set up. Especially if you only
have five machines or so, and not that many configuration changes.
> have a DNS server running on WinNT (it was harder to configure than any
> Linux daemon I have ever setup), and it has been great. If you DHCP you
> can link it to your DNS server, reserve IPs for certain computers w/ DHCP,
> and have them assigned a host name automatically.
> --Nick
Ok. I admit, I�ve got this setup at home as well (although I use Linux, not
WinNT), but not for convenience but for practice. But it took me the better
part of an hour to set it up, while setting up /etc/hosts would take five
minutes or so.
- Wouter.
------------------------------
Date: Wed, 30 Jun 1999 13:38:08 +0000
From: Jack Holt <[EMAIL PROTECTED]>
Crossposted-To: saic.linux
Subject: Automount of SMB Filesystems
I was doing some reading in the man pages for mount and it appears that
I should be able to add an entry to /etc/fstab to cause my favorite
Windows shares to be automatically mounted when the system boots.
Does anyone know what I would put in the fourth field of fstab to get
this to happen?
For instance, I want to mount //cp-its-srvr20/saicnet on a mount point
of /saicnet. I presume that I would format the line something like...
//cp-its-srvr20/saicnet /saicnet smbfs ?????? 0 2
Anybody??
------------------------------
From: Wouter Liefting <[EMAIL PROTECTED]>
Subject: Re: change TcpWindowSize ?
Date: Wed, 30 Jun 1999 16:32:30 +0430
Reply-To: [EMAIL PROTECTED]
Vidar Andresen wrote:
> In article <[EMAIL PROTECTED]>,
> [EMAIL PROTECTED] (Bio Hazard) wrote:
> >On my NT machine, I read about how I can improve my TCP/IP network
> >performance by changing the MTU size and TcpWindowSize. The changes I
> >made actually tripled my network performance! Now I'd like to do the
> >same to my Linux machine, if possible.
> >
> >I did find out how to change the MTU from within ifconfig, but I'm
> >wondering if it's possible to change the TcpWindowSize on Linux.
>
> man route.
>
> window W
> Modifier specifies the TCP window size for TCP Con-
> nections over this route. This is typically only
> used on AX.25 networks and with drivers unable to
> handle back to back frames.
>
> >Is it even necessary to modify these settings?
>
> The Ethernet-HOWTO at chap 4 maybe..
>
> Mvh Vidar Andresen
The MTU size is something that is dependent on your physical network. Ethernet for
instance will always need 1500 bytes as MTU (sometimes 1492 but ok), but Token Ring
may use variable MTU sizes. However, that is something your network administrator
will have to decide. If you mess with it without consulting him/her, your network
speed may improve, but performance for the rest may go down.Over larger distances,
Linux has Path MTU discovery (PMTU) enabled by default, so you don�t need to worry
about it - until you disable it (it�s a kernel option).
The Window size is something which is calculated dynamically - you don�t want to
mess with it since Linux is generally better in optimizing it than you are - unless
you use very strange network types like AX.25.
The fact that stock Windows NT is not configured optimally for TCP/IP does not mean
that this is also the case on Linux.
- Wouter.
------------------------------
From: [EMAIL PROTECTED] (Timothy Kelley)
Crossposted-To: saic.linux
Subject: Re: Automount of SMB Filesystems
Reply-To: [EMAIL PROTECTED]
Date: Wed, 30 Jun 1999 14:15:15 GMT
On Wed, 30 Jun 1999 13:38:08 +0000, Jack Holt <[EMAIL PROTECTED]> wrote:
>I was doing some reading in the man pages for mount and it appears that
>I should be able to add an entry to /etc/fstab to cause my favorite
>Windows shares to be automatically mounted when the system boots.
>
>Does anyone know what I would put in the fourth field of fstab to get
>this to happen?
>
>For instance, I want to mount //cp-its-srvr20/saicnet on a mount point
>of /saicnet. I presume that I would format the line something like...
>
>//cp-its-srvr20/saicnet /saicnet smbfs ?????? 0 2
I don't know about fstab ... if the share requires a password, I don't
see how it would work (anyone?) You could just put "smbmount" in your
rc.local
------------------------------
From: Ron Bombard <[EMAIL PROTECTED]>
Crossposted-To: redhat.networking.general
Subject: can't ftp/telnet as root
Date: 30 Jun 1999 13:10:59 GMT
Greetings!
I know this is a simple thing, but I can't seem to figure it out.
I just installed RedHat 6.0 and can't telnet or ftp into it from another
host as root. any other login is fine, just root.
what do I have to do???
Thanks.
--
Ron Bombard, Network Administrator
[EMAIL PROTECTED]
PO Box 2567, Glens Falls, Ny 12801
http://members.theglobe.com/virtual_ron
Sometimes loosing a wife can be hard... in my
case it was nearly impossible!!!
===================================================
_O_ _____ _<>_ ___
/ \ | | / \ / _ \
|==/=\==| |[/_\]| |==\==/==| | / \ |
| O O | / O O \ | >< | | |"| |
\ V / /\ - /\ ,-\ () /-. \ X /
/`---'\ /`---'\ V( `-====-' )V /`---'\
O'_:_`O O'M|M`O (_____:|_____) O'_|_`O
-- -- -- -- ---- ---- -- --
STAN KYLE CARTMAN KENNY
------------------------------
From: "J. 'FIK' Brand" <[EMAIL PROTECTED]>
Subject: PPP and win95 dailin
Date: Wed, 30 Jun 1999 15:39:44 -0000
I want to use a Linux machine as a ppp-server, the clients are Win95
How do i set up 'pap' so that it works with dialin-adapter from Win95
Jurgen
------------------------------
Date: Wed, 30 Jun 1999 21:55:27 +0930
From: Stephen Davies <[EMAIL PROTECTED]>
Subject: Net tools for 2.2.9?
I am currently running kernel 2.2.9, tcpdump V3.4 and net tools 1.52.
This combination give me errors in at least two places:
1. route add -net 127.0.0.0 gives SIOCADDRT too many arguments
and
2. running tcpdump gives "tcpdump uses obsolete (PF_INET,SOCK_PACKET)
In both cases,all functionality seems to be there (except that there is
no route entry displayed for lo).
Am I using the correct net-tools? If not,where doI find the correct
release and if so, what else might I be doing wrong to cause the above
behaviour?
Cheers and TIA,
Stephen Davies
========================================================================
Stephen Davies Consulting P/L [EMAIL PROTECTED]
Adelaide, South Australia. Voice: 041-980 1417
Computing & Network solutions. Fax : 08-8272 8863
------------------------------
From: Albert C. Lee <[EMAIL PROTECTED]>
Subject: Re: Proxim Symphony
Date: Wed, 30 Jun 1999 13:36:45 GMT
> Does one really need the Ethernet Bridge? It's pretty pricey. I
> figure, what's the real difference between using a Modem and a Cable
> Modem? Why would one need an Ethernet Bridge if one is using a Cable
> Modem? An Ethernet Hub perhaps, but why the bridge?
Hi Dan,
Well, most (if not all) cable modems are equipped with RJ-45 10bT jacks
instead of serial ports (for regular analog modems), so it needs to talk
to a network device. My modem (3Com 56k LAN) is one of a few solutions
out there that sits a 56k modem on the LAN like a cable modem.
If you have only 1 wireless client (a laptop), the Ethernet bridge
connects directly to the cable modem and the bridge talks to the laptop.
If you have a LAN already, and want a wireless client, the bridge is the
only solution to adding a wireless client, short of making the proxy
server on your LAN a wireless client also.
The bridge is *VERY* pricey, but is the cheapest solution I could find
that would allow me to connect my laptop wirelessly to an existing LAN.
Most Ethernet bridges run between $900-$1500, and each wireless client
costs between $350-$500.
Proxim has a very strong reputation in the wireless LAN industry, and
part of what you're paying for is name. But overall, I have found that
with the name comes exceptional performance, and ease of setup.
-Al
--
Nikon CP950 Samples: http://www.cavecreations.com/cp950
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.
------------------------------
From: Albert C. Lee <[EMAIL PROTECTED]>
Subject: Re: phoneline/wireless networking drivers
Date: Wed, 30 Jun 1999 13:39:32 GMT
The device he's referring to is the Ethernet Bridge. You need connect
it to a hub, and you can have up to 8 (?) wireless clients talk to the
Bridge.
-Al
> What's its name? I cannot find it at proxim.com/symphony.
>
> Thanks.
>
> Dan
>
> On Sun, 20 Jun 1999 16:10:23 -0700, "Andrey Smirnov"
> <[EMAIL PROTECTED]> wrote:
>
> >Hello,
> >
> >Proxim has a product that allows to create a wireless network and
it's not a
> >internal card, but a external device. And you don't need any OS
specific
> >drivers to make it work. The only draw back is the high price.
> >
> >Good luck!
> >
> >Ruth AnneF wrote in message
> ><[EMAIL PROTECTED]>...
> >>I was wondering if there are any drivers for any of the phoneline or
> >wireless
> >>home networking kits, as in Diamond HomeFree, Intel AnyPoint or
Proxim
> >>Symphony. I know WebGear is making Linux drivers for Aviator2.4,
but
> >they're
> >>not due out until July, and I would like to get my house networked
before
> >then,
> >>and hopefully without the expense of wiring up my house, but I need
for the
> >two
> >>Linux boxes that I have to be part of the network (one being a
> >masquerader).
> >>Thanks.
> >
> >
> >
>
>
--
Nikon CP950 Samples: http://www.cavecreations.com/cp950
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.
------------------------------
From: Wouter Liefting <[EMAIL PROTECTED]>
Subject: Re: Very Slow Network - 'pings' out of sequence
Date: Wed, 30 Jun 1999 16:36:13 +0430
Reply-To: [EMAIL PROTECTED]
Alex wrote:
> I have two linux boxes on my network - identical in hardware and software
> setup. (99% sure) But one of them is very slow at communicating with other
> machines over the network. Pinging the other linux box usually results in
> every third packet being 3 seconds later than all other packets, and so also
> out of sequence. (Sometimes its OK, sometimes its worse) As you can
> imagine, ftp & telneting to and from the machine is practically unusable.
> It's a mystery. Any ideas on the problem ? Thanks.
> Alex.
Duplicate IP addresses? Duplicate MAC addresses?
- Wouter.
------------------------------
From: [EMAIL PROTECTED]
Subject: Re: Cluster management - software??
Date: Wed, 30 Jun 1999 12:55:40 GMT
I'm unclear about whether snmp can be run over ssh.
Can anyone advise, because it'd be nice to have a simple way to acquire
realtime-ish performance data - and ssh/snmp could do that in a secure
way.
In article <01bec02e$8d5f1540$[EMAIL PROTECTED]>,
"Don Mills" <dmills{nospam}@techcom.net> wrote:
>
>
> Tobias Anderberg <[EMAIL PROTECTED]> wrote in article
> <[EMAIL PROTECTED]>...
> >
> > >Does anyone know of centralized cluster management software for
> > >a group of networked Linux boxes? We have a number of machines
that I
> > >would like to administer from a single centralized point. I've not
seen
> > >much in the way of Linux software for this purpose. Any ideas?
> >
> > www.beowulf.org
> <rant>Ignore this idiot. Beowulf is a multiple processing cluster,
not a
> distributed server cluster or anything like what you are asking...why
are
> so many people not understanding that point? It seems like everytime
the
> word cluster and Linux are mentioned in the same conversation somebody
> shouts out Beowulf when they should be shouting out Fake or
LinuxDirector
> or any of the other HA solutions people are working on. If you are a
> nuclear physicist attempting to model blast effects from a 100 Megaton
> weapon, yes by all means Beowulf is an awesome alternative to higher
priced
> options (Sun E10000, SGI Origin 2000) but if you are attempting to
provide
> load balanced or highly available services it will do NOTHING for
you. And
> especially to just put the URL with no explanation...thanks tobias
for that
> revelation</rant>
>
> Now as for your question, it depends on what type of adminstration
you want
> to do...if you are asking is if there is a centralized server manager
as
> with NT server manager the answer is not as such. If you are looking
to
> manage user/groups across the enterprise then you have NIS, LDAP/PAM
or
> some other project like Ganymede. If you are looking to manage
something
> else, your options are limited. SAMBA boxes can be managed by the NT
> server manager (if you can take using it)...for anything else you
might be
> stuck with SNMP if a MIB is included or you can hack one. At that
point
> you can use any SNMP compliant manager to run things (HP OpenView,
> Unicenter, Scotty/TKined)...of course remote management is also what
SSH
> was designed for ;-)
>
> --
> Don Mills
> CSA SCNA CCNA CCDA
> Network Security Officer/WAN Engineer
> VA Dept. of Social Services
> [EMAIL PROTECTED]
>
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.
------------------------------
From: Bob <[EMAIL PROTECTED]>
Subject: Re: Preventing inbound packets w/ ipfwadm
Date: Wed, 30 Jun 1999 22:15:13 +0800
On Tue, 29 Jun 1999, John Wolanski wrote:
> Date: Tue, 29 Jun 1999 21:48:51 GMT
> From: John Wolanski <[EMAIL PROTECTED]>
> Reply-To: John Wolanski <[EMAIL PROTECTED]>
> Newsgroups: comp.os.linux.networking
> Subject: Preventing inbound packets w/ ipfwadm
>
> Just have a question. I am using a cable modem hooked up to my Linux box
> (RH 5.2) and am using ipfwadm to masquerade it to another computer so both
> can share the cable modem, using the following commands:
>
> ipfwadm -F -p deny
> ipfwadm -F -a m -S 192.168.1.0/24 -D 0.0.0.0/0
>
> and of course, the 192.168.etc... is my internal network address.
>
> If I wanted to prevent inbound access from a certain IP address, from what
> I gathered of the ipfwadm man page, I would do it thusly:
>
> ipfwadm -I -a deny -S nnn.nnn.nnn.nnn
you may want to try a -P all switch as well.
Last time I looked, there was a -c flag for the policy, which allows you
to Check! if a certain packet would or would not be accepted.
>
> Is this correct? Will this prevent others from the specified IP address
> from accessing my computer, telnetting, FTPing, NFSing (heheh), etc...?
>
> --
> --John Wolanski
> email: jpw AT columbus DOT rr DOT com
>
>
Bob PHILLIPS
Director/System Administrator
[EMAIL PROTECTED] | ISP to the nor'west of Western Australia
| http://www.norcom.net.au
Yes, I am on the interthingy | If it aint broke, fix it, then it will be
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