Networking :: Unable To Ssh Without Dropping Firewall Security On Dsl Modem?
Apr 22, 2011
I have a home network with a linux dhcp server and a couple of clients. The Internet comes from a dsl modem with a different subnet than my wireless router. The network works fine and I have no problems, but I now need to ssh to a work computer and the only way I can do that is if I drop the security in my dsl modem. So I thought all I need to do is use port forwarding on my dsl modem, but it won't let me because it is on a different subnet. I tried putting the dsl modem on the same subnet, but that did not work and made it so I could not access anything.
As soon as i'm starting to copy a large file enough file (>700Mb) to my ubuntu box (connected to an Asus router via wifi) from a Windows 7 client (connected to router via ethernet cable) i get a dramatic drop in speed. upload starts at 1,0Mb/sec with a ping to ubuntu box at <1ms, and in 2 minutes it drops to 200kb/sec with a ping of over 1000ms! The ping increases with every second in a linear progression.
To exlude router as a possible problem copying to a windows 7 notebook connected to router via wifi results in an average of 2,7Mb/sec with an average ping of 150ms.
MB Model: Asus P5B Deluxe wifi OS: Ubuntu Server 9.10 + desktop installed Wifi configured via GUI
I got a new ISP, and it uses PPPoE. Let's say it's over eth1. After I connect there is a ppp0 -or similar interface. My question is what kind of firewall policy should I use on eth1? (block all, allow ppoe passthrough only or should I just do nothing?)
I did a port scan on my server from outside my network and saw that port 10080 AMANDA is open.Amanda isn't installed on any of my computers or my server and the port is not forwarded by my modem or router. So why is this port open and how can I close it?
I Installed a game server on my ubuntu desktop which is on port 7777. I can join the gameserver without any problems on my local network but when I'm trying to join using my external IP address its not working.
This is what I did:I Forwarded my port inside my router but it still didn't work.
I Removed UFW from my ubuntu machine
I Tried portforwarding with an other machine (iMac) and it's working there
Is there any Security on Ubuntu Desktop that's blocking my gameserver
I Got 2 Network cards in my Ubuntu PC
1. Is A Ethernet card that I use to connect my iMac to the Ubuntu PC (Internet Sharing on my iMac) For fast file transfers.
2. Is A WLAN card that I use to connect my Ubuntu PC to our network.
I have tried various rules, like opening port 53 for the DNS with little success. I finally figured that you need to set the source port to 53 and NOT the destination port.However, I have been unable to figure out what ports apt-get requires. The only way I get it to work is to accept everything in iptables.
I am trying to make a vnc connection from pc #2 to pc #1. Pc #1 is a debian pc behind a zyxel router (P-2602HW-D1A). Pc #2 is a windows xp pc another place at the internet.I have configured the zyxel router to forward incomming trafic on port 5902 to the local ip-adress of the debian box. The debian box is running a vnc server, listening on port 5902.But i dosn?t work.I have tryed to scan the zyxel routers ipadress on port 5902 from the internet, but the scanner says that the port is closed.The vnc server on pc #1 is working fine on the local network. I can connect to the server from a pc on the same side of the zyxel router.Is it deffenitly a router problem, or could it have something to do with debians own firewall?
i got the new Ubuntu 10.04 and manage to get my cisco aironet wireless adapter 340 series working on my wireless dlink modem , but the problem is when i have the wep security on the modem the cisco wont connect
I downloaded the usb-modeswitch and usb-modeswitch-data as suggested by one of the users from [URL] but whenever I try to install after going to the folder using sudo make install, none of the packages get inatalled. I am a new user and I am using ubuntu 9.10. I want to use my MICROMAX 300G USB modem to surf internet but can not do.
I have a ZTE CDMA 1x Modem (Reliance Netconnect). The modem has a USB interface and it works as a PLUG-&-PLAY device on windows (and has a Flash Storage too for driver information for windows.) I am unable to find my modem on Linux machine so that i can use wvdial for getting connected to internet on my linux machine. This the dmesg output for my modem.
Bus 005 Device 005: ID 0af0:6971 Option Globetrotter HSDPA Modem
My Problem is following:
Output of /var/log/messages:
Code:
Jun 25 16:16:25 destination kernel: [29898.995150] usb 5-2: new full speed USB device using ohci_hcd and address 6 Jun 25 16:16:25 destination kernel: [29899.148020] usb 5-2: New USB device found, idVendor=0af0, idProduct=6971 Jun 25 16:16:25 destination kernel: [29899.148031] usb 5-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
I am using Linux Mint 9 Gnome: Isadora (since the same Network Manager applet is used in Ubuntu, I am asking the question here too)I was trying to configure my wireless card to connect my PPPoE connection by using the command pppoeconf wlan0 and also pppoeconf.I was not able to dial my PPPoE connection when connected via Wi-Fi. When I restarted my system, in the Network Manager, under Wireless Networks it says "Device not managed". Now I am not able to use my Wi-Fi card at all and cant connect to my Wi-Fi modem.
There is no hardware Wi-Fi switch, only the key combination Fn+F2 to enable or disable the wireless card.I have used the key combination Fn+F2 (which enables or disables the Wi-Fi card) many a times, but the same thing is displayed in the network manager.If I use LiveCD mode and use any distro even Isadora, the Wi-Fi works fine.My ethernet connection is working fine. I can connect to the internet if I connect my modem using Ethernet port.
I have a ZTE MF100 3G internet USB modem working fine under ubuntu 10.04 but, there is a little problem:-It does connect in 2 modes: 2G and 3G. If 3G signal is fairly strong, downloading speed reaches 200 KB/s for 600 MB/Day, then for the rest of the day it switches to 2G mode with 15 KB/s max downloading speed. If 3G signal is weak, it switches automatically to 2G, and that's what I hate. Under Windows, I can manually force the modem to connect in 3G mode even if the signal is weak.
Tried turning firewall off, i tried port forwarding tcp port 22, but it still doesn't work. Also am unable to ping modem over WAN, i can ping the modem locally though. Tech support claims pinging and ssh is not part of the internet so they wont support it in any way.
I was testing the security of my Ubuntu 10.04 64bit install by running a port scan from [URL] and I came upon some odd results. It appears that basically all my ports are closed, but only Port 646 is dropping packets silently. Furthermore, Port 80 is open.
I have squid as a proxy on the Suse box, and with the default firewall I have to enable masquerading to allow clients on the eth3:1-3 to send and receive mail through the Suse box. I found the Suse firewall completely inadequate (all P2P software/connections are allowed once you enable masquerading) and had to install ConfigServer Security & Firewall. In die configuration of csf I could get my way around getting smtp to work for the eth3:1-3 clients, but pop3 connections does not go through the box. I know I need to allow port 110 and 995 to masquerade of NAT (or something) and then the same for port 22
I am learning to setup firewall in my home for that i have selected four system(sys1,sys2....sys4) for testing .I have configured sys2 to act as a firewall with two NIC. sys3 and sys4 are inside the firewall . sys1 is not connected to firewall for testing purpose.
the IP assignments are follows :
sys1 : ( fedora, not connected to firewall i am thinking, But i am not sure )
what happened is that sys1(not connected to firewall) can ssh to sys4(connected,inside firewall),since the rules are written not to ssh form sys1 to sys4..
then I came to know whatever the request I give, It directly goes as sys1 --> sys4. Not as sys1-----> sys2(firewall)---> sys4 .and the firewall is not filtering and processing anything for both inbound and outbound (i think it's my mistake some where). the requests are directly going inside without firewall.
I've FC10 installed. After updating a few days back, I'm unable to use Network Manager to connect to the net through my USB Modem. All the threads I've read say to do
Code: yum update NetworkManager but how can I do it without net connection? Can anyone post the exact link of the Network Manager's latest and BUG-FREE rpm so that I can directly run it?
find and install modem driver for the Alcatel X200 USB modem?
I've been all over the internet trying to locate Linux drivers but no success. Alcatel's website says is not supported, only in Windows. I'm sure there's gotta be a way to use the X200 in Linux.
i'm running Kubuntu karmic and i've been using a 3G Huawei E1552 modem to connect to the internet, everything was going well when suddenly my modem stopped working. I've tried reconfiguring everything, i even reinstalled kubuntu from scratch with no success.Here's a part of my /var/log/debug
HTML Code: Feb 8 17:14:01 alberto-laptop kernel: [ 1532.099883] usb-storage: device found at 7 Feb 8 17:14:01 alberto-laptop kernel: [ 1532.099888] usb-storage: waiting for device to
I couldn't connect my Micromax 300G modem in Debian Linux. From internet (in Windows Vista), I came across the information of USB_ModeSwitch and then I downloaded it. While going to install it, I came across the problem that TCL-interpreter is not available in Debian Linux. Then again I restarted my laptop in Windows Vista and connected my Micromax modem and from internet downloaded TCL8.5.10-src.tar.gz. But while going to install it, I came across the problem that " configure: error: no acceptable C compiler found in $PATH " . Also as presently, I am unable to connect my modem therefore I am unable to issue the code:" apt-get update ".
I have Ubuntu running on an old PE server. It is running Virtualbox with an instance of Ubuntu inside. The instance is there to run my honeypot.
The server box IP is192.168.1.10. The Virtualbox is bridged with it's own IP of 192.168.1.200. The honeypot daemon is listening to 192.168.1.201 with arpd.
I set up the UFW with DENY. And then enabled only the ports leading to the honeypot scripts which are abound to IP .201. I then forwarded the ports necessary to run VNC to .200.
Here is the UFW status: buntu@ubuntu-desktop:/var/lib$ sudo ufw status Status: active To Action From -- ------ ---- 192.168.1.201 21/tcp ALLOW 21/tcp 192.168.1.201 4444/tcp ALLOW 4444/tcp 192.168.1.201 5544/tcp ALLOW 5544/tcp
Up until recently, as in a few days ago, I was using Ubuntu and had ufw managing the firewall.It's been "recommended" that iptables itself be used. Where do I do the rules go (as in a file) and how do I call those rules at startup?
im currently running fedora 11 on my computer and i have this old firewall called firestarter. firestarter is very outdated but it has better rules for blocking connections like IGMP does any one know how to add filter rules so i can block IGMP trace and other unknown protocols it would be cool
