Slackware :: Network. No Rc.netdevice. No RX Or TX Packets?
Aug 8, 2010
I created a similar thread last week in the networking section but only got one response. I was hoping to get a little more help here as this forum helped me tremendously to partition my hard drive safely. That was over a week ago, and ever since then I have been struggling with setting up my network. Here is what I have done.Basic set up with netconfig. I selected DHCP and followed the directions on the screen.ifconfig -a shows eth0 with no RX or TX packets at all, but at least it showed me information. If it was not detecting my card (which is compatible with linux), it would have said no device found. correct?
dhclient eth0 just hangs there for half a minute until I can add a command again.dhcpcd eth0 times out.I read (in slackbook chaper 5.2.1) that the correct kernel module may not be loaded. So I opened rc.modules with pico and went to the netdevice section. In slackbook it said to find my device and uncomment it.... but I cant find it! (I have an atheros ar9285 in my stock compaq CQ61 laptop) I also opened rc.netdevice and it was empty..It seems like the more I learn about the network, the more lost I get. I keep hearing that configuring a network on slackware is easy, am I just missing some simple step?Also, whenever I startx, akonadi gives me an error. I also get another error saying that it could not parse XMS file. Is that just due to my lack of an internet connection at the moment?
I just installed Slackware 13 with xfce and everything went well (eventually). At first, my wireless didn't work, but then I found /etc/rc.d/rc.wireless.conf. Everything was working, and I was happily surfing and downloading packages.But then one day... It just stopped! I tried to ping google, and it could send packets but not receive them.I'm connecting through an unlocked network in my building, so I guess it's DHCP (thats what i set it up with the first time 'round
i have a linux server runnig oracle applications. i need to access this server from putty using ssh through internet. i did by registering my static ip with the dnydns.org and i am able to connect to the server. but now there is no security to authenticate any user as any one knowing the password can login to it.
i thought of configuring the firewall of linux server but the client ip`s are not static and they change continiously. so thought of keeping one more pc between the server and the router which will do the work of authenticating. but i am confuse as how to configure it to allow the packets coming from the internet after authenticating and to by pass the packets generated from internal LAN?
I am not a networking expert by any means (in fact I have never taken a networking course), but I have taken several security courses, and generally we wind up discussing replay attacks. For example, the Needham-Schroeder protocol (using symmetric-key cryptography anyway) is flawed because it allows for replay attacks, and I understand why.
I guess my question is actually how someone would perform a replay attack. I know I can sniff network traffic by downloading wireshark. I also have downloaded winpcap and npg on my WinXP virtual machine. I'm trying to use this guide to help me, but I'm quite lost:[URL]What I did was to post a "link" to my facebook profile and I sniffed the traffic using wireshark. What I would ultimately like to accomplish is to copy that packet out of the wireshark output, and then use a tool like npg to transfer the raw packet back to facebook, which should result in a second, redundant post. I just can't figure out how to do that.
I'm pretty sure this should be possible. Facebook only uses an SSL session for authentication during login. After that, the information is just sent in the clear, so I'm pretty sure this should be possible.Can anyone explain how to do such a thing? It would really help my research paper that I'm working on this semester if you can. As of right now the attack we are trying to demonstrate/defend against is using a Windows VM, which is why I'm using winpcap/npg. The attack is actually possible using just about any OS (depending on the exploit used), but our POC is Windows only at the moment
I'm using madwifi linux driver (ath1) in monitor mode to capture some wireless traffic. I can see that all wireless traffic is coming well through the wireless interface (checked using TCPDUMP). What I want to know is how I can forward the captured wireless packets to a different Ethernet interface (e.g. eth2) in the same machine to send those captured packet out to a different computer.
I set 1 for /proc/sys/net/ipv4/ip_forward
for iptables, I tried this rule: iptables -A FORWARD -i ath1 -o eth2 -j ACCEPT
However, I coudn't read any packet from eth2 via TCPDUMP.
I am running into trouble while trying to set-up a iptables routing policy. I have two machines on the same sub-network (xxx.xxx.153.0). One of the machines is used as a default gw for the other (xxx.xxx.153.250 is a gateway for xxx.xxx.153.142 and xxx.xxx.153.254 is a gw for xxx.xxx.153.250). There is no explanation for why the xxx.xxx.153.250 is in the middle -- xxx.xxx.153.142 can go straight to xxx.xxx.153.254, but is is like that for now.I am trying to find an iptable rule to be executed on the xxx.xxx.153.250 machine to route the packets.
I am using vnuml to test a network project. I have one Ethernet card on my ubuntu 9.10( eth0) with network 10.1.0.0/16, and creating a tap0 with subnet 10.4.0.0/16. Now the problem is how to work them together, such that packets from one interface goes to other one?
I have users using Windows XP, Windows 7, Linux (Fedora) and Mac. They all are in a single private network and all access internet through a Linux (RHEL5) system in which Squid acts as gateway. The same is true with my branch offices too except that private network is different and gateway system uses Fedora 9 instead of RHEL5. All the branch offices are connected through point to point leased lines with the head office for file transfer.
My requirement is this: I have a web server located at head office. Presently I am able to access this server from my branch offices through internet. I would like to access this server from branch offices through leased lines. This too I am able to access if I do routing in users system. The file transfer is taking place through one to one system at two ends by creating static routing in those systems.
I'm looking for an open source/free network emulator tool that I could use on Mac OS X, to simulate a slow network connection, limited bandwidth and other network characteristics such as dropped packets etc for both UDP/TCP connections (or even on the physical layer).
I'm looking for the simplest solution that would allow me to run TCP/UDP servers and have a few clients connect to them on localhost emulating various network connections. I'm mainly wondering if I can use something like Linux's netem on Mac OS X (or even better cross-platform Windows/Linux/Mac). Perhaps I can run VirtualBox and a Linux kernel running netem, has anyone had luck with that?[URL]...
I have a small network with 4 users, a Win2003 server for LAN/security functions, and a Dell Blade server running Ubuntu 8.04.1 which runs as our web server on port 80. I manage the Ubuntu server with Webmin v1.42Yesterday, my users weren't able to access the internet nor were they able to receive mail, etc. and no one could access any of the website hosted on the webserver. However, the internal users could access each other's PCs and internal printers and devices - just nothing outside.
I began to troubleshoot: I could see a lot of activity on the Router/Firewall on the port connected to the Ubuntu server. When I unplugged the server, everyone could immedately connect to the internet. So, the problem was originating with that server.When I logged in to the Ubuntu server using Webmin, I checked System>Running Processes and right at the top of the list was the process:ID Owner CPU Command23184 www-data 98.1% ./s 174.120.164.186 7777When I drilled down on this process it said that the parent process was:/bin/sh -c ./s 174.120.164.186 7777I pressed the Trace Process button and it appears to be sending the following repeatedly:Time System Call Parameters Returnxxxx send 125,0123456789ABCDE,15,0 15So, I manually Killed the process and added a rule to my firewall/router to block an IP range that includes 174:120:164:186
A few hours later the same process stars again in Ubuntu,, effectively plugging up my pipeline to the internet and preventing access to the websites being hosted.It suspect that there is some kind of virus on my Ubuntu machine but have no idea how to locate and destroy it. I am relatively new to the Ubuntu world and would appreciate anyone's help immensely! I just don't know what to do!
I'm sniffing network packets in ubuntu, I need to write these packets as raw bytes to memory but libpcap give packets in its special format. how can i save and recover packets in byte format?
My LAN has 2 PCs installed, Ubuntu 10.04 and Windows XP. I run the server on Ubuntu, and client on Windows XP. Because I am doing stress test, so the client will keep sending tons of packets to server.
The strange thing is: After few seconds, the client program crash because of insufficient network buffer, the server is still ok. But after that I cant connect Ubuntu PC anymore until I restart it. And I check the router, the led for the Ubuntu PC is always ON (not blinking), look like it is jam already.
I have a system running 11.04 and it is dropping packets on the hardwired ethernet interface to other systems on the LAN, only in the inbound direction. It drops packets every 5 seconds. I verified this with iperf. Outbound packets pass with no problems. The network card in this system is a Broadcom Corporation NetXtreme BCM5752
I am using tcp for data transmission between 2pcs running linux.During transmission, I have noticed that if I unplug the network cable and reinsert it quickly,connection is not lost(same as i expect)and the sender start to resend the packet after 5s(what i expect is that network packets sent immediately after quick physical disconnect and reconnect).My question is can i reduce 5s to 0s(resend immediately after network cable reconnect)?Any parameters(tcp rto,txqueuelength,..) can be modified to achieve this condition?
I have a DSL brodband connection. The internet connectivity was working fine but lately, I am am facing problems while connecting to internet.Upn connecting the cable to the eth0, the /var/log/messages shows repeated instances of:"kernel:corrupted packets received"Also, if i use pppoe-dicovery, I get " Timeout Waiting for PADO packets" error.There is nothing wrong with the cable. If I connect the cable to a windo$s xp laptop, internet connects fine without any problems.Any idea what could be going wrong? Since the internet was working fine earlier on my opensuse box, im not sure what could have gone wrong with the settings.
I have a hardware device with two ethernet ports, eth0 and eth1 running Centos 5. Basically my goal is to forward packets from eth0->eth1 and eth1->eth0 as well as get a copy of these packets for analysis. If I set IP routing to do the forwarding then I won't get a copy of the packets for analysis.
I do have trouble in configuring my wireless network,though i configured it as what Alien BOB say(http://alien.slackbook.org/dokuwiki/...ckware:network) and google some similar Threads.My latop is Asus F83vf, wireless card is Atheros AR9285 Wireless Network Adapter. The code when I run lspci command is code...
Someone could configure the ipw2100 in ad-hoc mode with WEP? i can't even get the interface up and working (tx-power is off and the ESSID is always "any"). i've tried configuring with iwconfig and the KDE network configurator. There is some previous step to get the wireless card up and running?
I've got a problem which drives me crazy. There is a website I am unable to connect (and a server). This problem appears only when I am workin at home, using my wifi network with my wifi router. Why am I becoming mad? I have four other systems: W2000, WXP, OpenBSD, Debian, they all use the same wifi router for a connection and there is no problem at all. It is not related to that particular computer cause eg. OpenBSD is installed on the same computer, it uses the same wifi card (so no some kind of a MAC filtration on the side of the router) and working on OpenBSD I can connect. For me it seems that accidentally I set some kind of a wall in the Slackware. But where and how? Where should I look for some filters or settings which may cause such strange behaveour?
Let me be clear: it is only about that particular site, I have an internet connection, I can google, I can do all thing, but I'm unable to connect to exactly this one site. Yeah, you know I always said that all companies should employee me as a super alfa tester. I'm able to broke everything. No system is secure when I'm working on it.
I installed slackware64 13.0 on my Dell D630 laptop. Recently I found a wierd network problem:
Sometimes, after couple of hours, I nearly cannot open new websites. It takes so many time to open a page. (I tried in firefox, lynx and konqueror.
But some other connection still work, such as KRDC.
I tried nslookup and dig, they all works very well, so the DNS is ok.
But ping works very slow with some url if I use the domain name. And it runs very fast with the ip of that url. So, maybe there is some problem with the DNS, or something else.
ping result is:
1) ping by domain name
2) ping by ip (same target)
Restart the network with rc.inet1 cannot fix this problem. Only I can do is reboot the computer.
May be it's a kernel(2.6.29.6) bug? Or the bug of my wireless card driver(BCM 4311)?
I just installed slackware 13 with kernel 2.6.33.4 , everything seems to be ok so far, but the system does not load eth0.Ive tried netconfig , ive tried to configure rc.inet1.conf by hand and run rc.inet1 eth0_start but nothing works.After running netconfig the system says everything is ok , but when I run ifcofnig there is no eth0.
I am having trouble getting my wireless card to connect to my network. I believe I have done everything correctly. Here is my wpa_supplicant.conf file:
I have never connected to a wpa network using slackware before, so I am not entirely sure how to use wpa_supplicant. I have altered the conf file, then tried dhcpcd and it times out.
Right now I cannot ping to my default gateway. The machine also has SuSE installed on a separate partition. Networking with the same parameters runs fine in that installation.
I use a troubleshooting checklist for situations like this: - network troubleshooting checklist - (case of wired connection with static ip) - make sure net cable is well plugged in on both sides. CHKD. - make sure ifconfig eth0 details the static IP you want set and that the iface is running (this stage is quite a head start if you've got to it. It would suggest that you have rc.inet1.conf set up properly. CHKD. - HAL checked against eth0, and it also specifies eth0 for this interface. - no problem pinging to 127.0.0.1 - type "route" and see if your default gateway comes up. SEMI-CHK: it does come up but takes a long while .. that's bad sign. It still means your rc.inet1.conf is OK, but here's something else up. - check /etc/resolv.conf for your nameservers .. just in case some over-zealous program has decided to overwrite it. CHKD, all OK .. I use the google nameservers 8.8.8.8 and 4.4.8.8
Despite using what I thought were decent tools of the trade, if I unplug the cable they give the same output!
I have a slackware 12.2 server. We had some really rough storms this weekend that took the power out for many hours. The UPS that it was connect to gave up the ghost and the server went down hard. I powered up the unit and it some up fine but with no network. Ifconfig -a shows that it only knows about the lo interface. Both integrated gig ethernet ports are missing. I am not a slackware expert. Need to figure out what is needed to get it back on the network. dmesg | grep eth0 shows nothing. Nor eth1. ifconfig eth0 returns no such device.
