--- Devdas Bhagat dodobh@nettaxi.com wrote: >

+++ Amish Mehta [01/04/02 17:46 +0530]:

...

Hi,

I want to connect my home and office computers(atleast share files,

full TCP/IP would be best). But the problem is both computers have invalid IPs 172.16.x.x and I do not have control over gateways to ....

The invalid IP range will not be a problem. Just ensure that they are in different subnets. At least one of the systems will need a static IP address. Run the VPN server on this system. The other system will act as a client.

Probably Amish has a setup like this -

+---------+ +----------+ +---------+ +-------+ | Home PC |----| Cable GW |---<> Internet <>--| Off. GW |--|Off. PC| +---------+ +----------+ +---------+ +-------+

1. Since both the PCs are on private subnets, even if we managed to route the packets from the home PC to the office gateway, the office gateway will reject the packets bound for its private subnet because they are initiated from an external host. (This is if a firewall has been configured properly). 2. IPSEC won't work because the Cable GW does natting on the packets originating from the Home PC. And there is not control over the cable GW. 3. We can connect to the Office PC with a PPTP connection, but it will need a VPN service on the Office GW.

In any case, you'll atleast need a VPN server on your Office GW.

...

setup VPN(one on in2 cable network, other on star cable network). I can keep both computers on 24 hrs, having access to internet via their local gateways. But I do not know how they will find each other.

One of them needs a static IP address,

...

Currently I manually email and download files but is there a way I can actually FTP to and fro?

I would recommend scp actually, but you need the VPN first. Devdas Bhagat

He can't do even an ssh/scp without his admin's grace. So Amish, try maskaoing your admin. (That'll not help much if he is a good admin)

:-)

Nilesh.

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Hello Luggers,

--> Luggers..this is the CyberRoam software that has reached my hands......u'll r free to download it from the following location.

http://www.qmailtheeasyway.com/rel/

It's an executable called..."24onlineClient".

Below is the instructions from the Elitecore guys......

PN: I dont take ny responsiblity for ny screwups u make with the Software......Pliss use it @ ur own peril.

Trevor Warren

******************************************

Dear Customer,

This 24online client will run on any linux platform only. Not on Solaris or MAC.

Put this 24online Client in your home directory on linux machine or in /root directory. Also you need to enter first configuration Details like server ip , username, password.

Login Steps:

1. copy 24onlineClient executable to /root folder 2. Be super or Root user 3. do chmod 755 /root/24onlineClient 4. At prompt# type : 24onlineClient -s A. It will ask you for AskonExit: type y B. it will ask for AutoLogin: type n C. it will ask for ShowNotification: type y D. It will ask for server ip address: type 172.16.0.1 or whatever is 24online server ip address.

5. To run client type this at # prompt : /root/24onlineClient -u username (username means whatever username you have created in 24online GUI) like manager, administrator ..etc 6. It will ask for password. (password is case sensitive) make sure about casename. 7. and Last type Enter. it will login. 8. You can check instance of 24online Client running by command at #ps -ef

Logout Steps At # Prompt type : 24onlineClient -l

Thanks Harish Chib Elitecore Technologies

===== ( >- GNU/LINUX, It's all about CHOICE -< ) /~\ __ http://www.qmailtheeasyway.com __ /~\ | ) / mailto: trevorwarren@yahoo.com \ (/ | |_|_ \ Urgent ->9820349221@maxtouch.co.in / _|_| ___________________________________/

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--- SP sandeep_from@yahoo.com wrote:

hi,

I am looking for some good books on Firewall. Can someone advise some good books and approx. cost.

[snip] depends on wat kindda firewallin ur lookin out for...

1 that comes to my mind is the 1 from BPB Firewalling using Ipchains for approx 300/-.

The issue is that Ipchains on linux only addressed the network layer of firewalling......application layer nd uer level firewallin cant b achieved........with the available tools.....

Trevor Warren

Help Appreciated. --SP

===== ( >- GNU/LINUX, It's all about CHOICE -< ) /~\ __ http://www.qmailtheeasyway.com __ /~\ | ) / mailto: trevorwarren@yahoo.com \ (/ | |_|_ \ Urgent ->9820349221@maxtouch.co.in / _|_| ___________________________________/

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building internet firewalls from O'reilly is good. Also, look at "building linux firewalls"...I forget the publisher and author...shud be able to give you those details by evening.

regards ----- Original Message ----- From: "SP" sandeep_from@yahoo.com To: linuxers@mm.ilug-bom.org.in Sent: Sunday, April 14, 2002 6:32 PM Subject: [ILUG-BOM] Good Books on Firewall

hi,

I am looking for some good books on Firewall. Can someone advise some good books and approx. cost.

Help Appreciated. --SP

---

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+++ Nilesh Chaudhari [13/04/02 22:59 +0100]: <snip>

+---------+ +----------+ +---------+ +-------+ | Home PC |----| Cable GW |---<> Internet <>--| Off. GW |--|Off. PC| +---------+ +----------+ +---------+ +-------+

1. Since both the PCs are on private subnets, even if we managed to

route the packets from the home PC to the office gateway, the office gateway will reject the packets bound for its private subnet because they are initiated from an external host. (This is if a firewall has been configured properly).

Correct. That is why a VPN is needed. A VPN is an IPSEC tunnel over IP. This means that the RFC 1918 packet is encapsulated in a valid public IP packet, which the gateway will accept and the VPN server on the gateway will deal with.

2. IPSEC won't work because the Cable GW does natting on the packets

originating from the Home PC. And there is not control over the cable GW.

BTW, according to the original mail, both PCs are behind a cable modem from the same provider.

3. We can connect to the Office PC with a PPTP connection, but it will

need a VPN service on the Office GW.

In any case, you'll atleast need a VPN server on your Office GW.

Without a proper diagram of the logical setup, it is hard to guess exactly what is needed. <snip>

He can't do even an ssh/scp without his admin's grace. So Amish, try maskaoing your admin. (That'll not help much if he is a good admin)

This will depend in the exact need.

Devdas Bhagat