I use wireshark (ethereal) to moniter the traffic passing through the NIC. I find that system always sends "bad checksum" TCP/UDP packets. In CentOS 5.2 this is seldom. Does your system (5.3) send "bad checksum" TCP/UDP packet ?
View 2 RepliesMy machine is trying to communicate with another computer. I�ve blocked the traffic with this machine with iptables (input and output traffic), but I want to find the origin of this traffic. There�re 90% of probabilities it�s a trojan, and I want to find it.I have logged the packets with iptables (and then dropped), but with this I don�t know the proccess source.I�ve tried with netstat -o, but I don�t get nothing.How can I see the Process source (i.e. the PID) of this traffic?The traffic are TCP packets, with SYN flagged active (my machine is trying to establish a connection with that IP).
View 9 Replies View Relatedi need to write a program in c that can sniff packets from Ethernet and distinguish RTP packets from Non-RTP packets, i have no idea what should i do
View 9 Replies View RelatedI get the following error on 'yum update'. I have tried 'yum clean all' and also:
rm -f /var/lib/rpm/__db*
rpm --rebuilddb
# yum update
Loaded plugins: fastestmirror, protectbase
Determining fastest mirrors
* base: mirror.sov.uk.goscomb.net
* updates: mirror.sov.uk.goscomb.net
[Code]....
Can anybody tell what command can be used to check the checksum for a file or to match the checksum with the one provided by the download provider.
View 1 Replies View RelatedI have several CentOS 5.5 machines running on my network; yum works just fine for them. I used the 5.5 cds to install them. I decided to grab the DVD of 5.6 and build a new machine. Can't run yum.
http://mirrors.finalasp.com/CentOS/5.6/updates/x86_64/repodata/primary.sqlite.bz2: [Errno -1] Metadata file does not match checksum
Trying other mirror.
[code]....
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 have just installed a fresh copy of CentOS 5.3 and from the get-go, the NIC started dropping packets like crazy. I even closed the port on the switch,. moved the cable to a different port,. All yield the same "dropping packets" behavior. Zero on the errors, just dropping packets. Should I stick a diff nic instead?
View 1 Replies View Relatedif am using --log-prefix "BANDWIDTH_OUT:" --log-level 7 to capture packets, I think is there a way to view these?
View 4 Replies View RelatedI've got an odd one, running the CentOS 5.3 kernel, I'm experiencing lost packets on one of the two NICs when tested with ping. In this particular case, it's the internal NIC that causes the problem, pings from the CentOS machine to the public network over the external NIC never loses packets.(internet)<-->CentOS<--> (LAN) <--> desktop
- CentOS can ping the internet with no packet loss
- CentOS loses packets when pinging the desktop(s)
- Desktops lose packets when pinging the CentOS box
- Taking the LAN switch out of the equation still results in lost packets
- When the LAN NIC on the CentOS box "acts up", all desktops start losing packets
I've swapped out the NIC a few times for different makes/models, and I'm still getting lost packets to/from the internal network. So, I'm thinking that there's something squirrely going on higher up in the network stack. But evidently, not enough to log anything to the console or into the log files.At the moment, I'm leaning towards it being an issue with the nForce 750a SLI chipset. But it's odd that it only affects the LAN card and not the WAN card. I've even swapped the positions of the two NICs, and the problem persists on the LAN card.The other possibility is that iptables is eating packets silently, but in a random fashion.
After adding rpmforge on a fresh installation of CentOS 5.4 64bit, I received the error "Metadata file does not match checksum" so decided to try the fix yum -y remove yum-fastestmirror, As discussed at [URL]... Unfortunately, this also deinstalled yum. If I try to reinstall from my CentOS 5.4 DVD, I get:
# rpm -i --aid yum-3.2.22-20.el5.centos.noarch.rpm
error: Failed dependencies:
yum-fastestmirror is needed by yum-3.2.22-20.el5.centos.noarch
But if I try to install the yum-fastestmirror I get
# rpm -i --aid yum-fastestmirror-1.1.16-13.el5.centos.noarch.rpm
error: Failed dependencies:
yum >= 3.0 is needed by yum-fastestmirror-1.1.16-13.el5.centos.noarch
Which is a bit circular.
I've got Tyan S4989 with gigabit ethernet controller Intel Corporation 82571EB. Sometimes server starts drop packets and doesn't respond to any connections and all logs doesn't contain any errors. iptables and SELinux switched off on CentOS 5.3(2.6.18-128.1.6).
View 3 Replies View RelatedI am running Debian Lenny and if I try to install something with apt-get it behaves normally until near the end when I get this sort of thing:
Code:
And more of the same. The file w3m contains this:
Code:
So what please is the syntax error and how do I correct it? What is the function of /usr/share/menu?
I use this command line to transcode media file
Code:
ffmpeg -i in.ts -y -threads 2 -vcodec libxvid -b 300000 -bufsize 8192 -g 300 -s 320x240 -aspect 4:3 -f mp4 -pass 1 out.mp4
[code]....
I just installed Ubuntu 10.04 on my Acer AS1410 netbook. I'm having a huge problem setting up a VNC server for it. I've got it all configured so I can connect to it, it loads up the gnome desktop just fine, I can move the mouse around and everything. The problem is that the mouse seems to click away constantly whenever I am remotely connected. If I hold the left mouse button down on the client end it stops this action, but as soon as I let go of the button it starts clicking away again.
View 2 Replies View RelatedVia a network traffic monitoring tool I see that my laptop is generating lots of outgoing (EDIT : incoming !!) network traffic. Although no download program is running or any other program of which I know that could be generating this much traffic. Something strange is going on and I need to know how I can find out which program( s ) are generating network traffic.
View 7 Replies View RelatedI sorted a large mailing list and the result is in almost sorted order, but not quite.The sort was invoked in the default manner, just "sort".See (below) a segment of the output file.(Note: the actual files have a street address following each name.I have omitted the addresses to avoid complaints about disclosing personal information on-line.) I expect all people named KATZ to be grouped together, but they aren't. This phenomenon occurs elsewhere in the output file, so it has nothing to do with surnames beginning with the character string KATZ.
View 5 Replies View RelatedMay I know what is wrong in the following TAR command? It works, but generate a warning...
> tar -cpzvf /etc/a000/backup.tar.gz /etc/r000
tar: Removing leading `/' from member names
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.
View 3 Replies View RelatedMiro worked well with Wheezy. When I upgraded to Jessie Miro started generating a python error as such:
Code: Select all~$ miro
using /usr/bin/miro.real
Traceback (most recent call last):
File "/usr/bin/miro.real", line 183, in <module>
from miro import startfrontend
File "/usr/lib/pymodules/python2.7/miro/startfrontend.py", line 53, in <module>
[Code] ....
I have been searching for a few weeks trying to find an answer to no avail. I tried three different kernels, renaming ~/.miro, checked all dependencies. I reported it as a bug which sat there for a few days and disappeared.
I have a setup samba and want to get the correct security permissions when my wife creates / copies files from her camera onto the shared/mapped drive on her new laptop (windows 7) I want the permissions set to 770 or maybe 760. See my config below.
Now I can get it to create 760 but even if I change the mask it still generates the same permissions. After every change I restart the samba service. the umask is still 0022, do not know if that makes a difference? The directory permission's are correct with this mask. Do I need to look at groups?
[Code]...
I currently have Red Hat 5.4 installed and subscribed to red hat network for alert updates.The updates will be done by our administrator but I will like to check if the admin has done so on a weekly basis. Is there a command that generates a report or allows me to check if certain updates has been patched? I understand running a yum update will list all applicable patches. Should we just simply update all or only certain applications applicable to our organization environment?
View 2 Replies View RelatedSo, if i want to embed a video stream on my site and use the one that the company provides, it has ugly colors that clash with my website.And, if i do Internet searches for a customizable one that allows color changes, the results i get are to download windows programs.Can you direct me to on on-site code generator or a linux download that generates color-customizable FLV/SWF shockwave flash Players? So that i may use my own Embed GUI with the proper color that matches my website. I cannot seem to find one on my own.
View 3 Replies View RelatedUsing Ubuntu 10.04 on an old HP DV4000 laptop. Trying to do a backup from my laptop's disk to an external USB drive using DD while booted from an Ubuntu boot disk. The laptop's hard drive is not mounted. I was also using a checksum to verify the backup against the hard drive like so:
Code:
$ dd if=/dev/sda of=/media/usbdrive/whatever.img
$ md5sum /dev/sda > laptop.md5
$ md5sum /media/usbdrive/whatever.img > img.md5
Unfortunately over two separate attempts I have not got the checksums to match. However, I have mounted the dd image and retrieved part of the backup from the image, with no apparent corruption. Are there any reasons other than data corruption that could be causing this? I have not tried to restore from said image to see if it "works" (for obvious reasons).
How can I checksum a directory?
Using both cksum and md5sum yields the same error
Code:
root@linux# cksum /bin
cksum: /bin: Is a directory
root@linux# md5sum /bin
md5sum: /bin: Is a directory
[Code].....
I've got a few video files that came with md5's. I want to check them but I don't know how.
View 6 Replies View RelatedI'm running 2.6.32-28-generic. I have a raid1 (two 1tb drives with two partitions... one for / and one for /home.) After a power outage, I'm seeing grub complaining about /dev/md0 not existing (ALERT! /dev/md0 does not exist. Dropping to a shell!)
I booted to the latest live CD to have a look around. My dmesg output includes these ominous lines:
Code:
Here is the whole dmesg output: [url]
I have a large tarball which is bz2 compressed, and I would like to get a md5 sum of the files contained in it, as I have a separate directory on another server containing what I think are the same files. I want to check to see if the tarballs files are the same as the uncompressed files on the remote server. The files are big 10gb+ so I was wondering if there was a quick way without having to uncompress them all and then md5 them.
View 4 Replies View RelatedThis is the first time I have made my own install disks, instead of buying a boxed set. Edmunds Enterprises apparently doesn't sell them anymore. The checksum values are listed on the download site, but how do I compare them with my downloads? My ext3 partition is formatted (blank) awaiting installation, so I will have to do this in Windows, and I don't know how.
View 8 Replies View RelatedAs everyone know, the checksum of PEC in Sbus is CRC-8, but in my project, the checksum way is zero-checksum, the SMBus read transaction as below.
View 2 Replies View Related