Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [checksum]

70 questions
2
votes
2 answers

Windows checksums?

I am looking for a official source for windows checksums (in my special case windows xp). Normally I use the "Microsoft Benefit Portal" for that, but seems like it's gone, at least I can't find it anymore using google ): Anyone knows where to find…
stefan.at.kotlin
  • 905
  • 3
  • 13
  • 20
2
votes
2 answers

How to enforce rsync against performing checksum?

We perform nightly backups of a Windows file server by first creating an incremental backup file on the server each night (as well as a complete backup on Thursday night), and then copying that to a backup server running Linux/Ubuntu. In order to…
HorusKol
  • 751
  • 5
  • 13
  • 31
2
votes
1 answer

Does DisableTaskOffload disable all related LAN Adapter settings?

I have been getting problems disabling Checksum Offload in a lot of LAN adapters manually. Does setting the DisableTaskOffload value in the registry disable all of the related parameters regardless of LAN card? ie…
vfclists
  • 1,632
  • 5
  • 22
  • 37
2
votes
2 answers

How can I verify the integrity of a WAN connection?

We have two scanners in our branch office which upload images to the head office via FTP. In the last week, both scanners have started delivering a lot of corrupted images. I suspect that the problem may be with the WAN link, and that TCP might not…
Nic
  • 13,425
  • 17
  • 61
  • 104
2
votes
0 answers

tcpdump: invalid cksum from client to localhost interface even after disabling offloading

I'm having a strange issue. In linux I have two windows open. one running tcpdump and one running curl. I used curl to try to make a connection to local host and tcpdump logs invalid checksum errors. This is the log from the tcpdump…
Mike
  • 21
  • 2
2
votes
0 answers

Disable or recalculate tcp checksum validation on `docker0` interface

Because I need to use esp in transport layer in a docker container, I want to disable tcp checksum verification in the docker container. Is there any way this is possible? If not, is there some way I can give the packages to a custom netfilter…
networkstudent
  • 21
  • 1
1
vote
0 answers

Suddenly cannot ssh into any machine

Suddenly I was not able to ssh to any machine. I thought it to be my router/network issue & I tried it with different network but the result was same. I took tcp dump on both server & client and found that the checksum is incorrect. Client is on…
Ishan Jain
  • 11
  • 2
1
vote
1 answer

ICMP/Internet checksum if packet entirely constists of zeros

We are currently investigating a strange behavior of different devices: if we send "empty" ICMP packets (that is, ICMP-SEQ and ICMP-ID are 0x0000 and no ICMP payload), for example using nping --icmp --icmp-seq=0 --icmp-id=0 8.8.8.8 then different…
Adrian W.
  • 11
  • 1
1
vote
2 answers

Is the TCP checksum over the payload?

I was somehow convinced that the TCP checksum was a header checksum (similar to the IP checksum), but I'm now having doubts reading the Wikipedia article: The checksum field is the 16 bit one's complement of the one's complement sum of all 16-bit…
Randomblue
  • 1,165
  • 5
  • 16
  • 33
1
vote
3 answers

Install Java EE 6 on CentOS 6

Having problems installing Java EE 6 in CentOS 6 x32. I have removed all previous version of Java and freshly installed temporally jdk1.6.0_34. So my $PATH variable goes to:…
jacktrades
  • 622
  • 3
  • 8
  • 17
1
vote
1 answer

Rsync backups: checksums don’t match

I am a little confused by this although diff –rq dir/ dir1/ does not show a difference This rsync is to backup the directory rsync -avrREz --delete --links -e "ssh -l user" --delete dir/ site.net:dir/ && tar -c /dir/ | md5sum but it does not…
Quintin Par
  • 4,373
  • 11
  • 49
  • 72
1
vote
2 answers

sqlite.bz2 File does not match checksum - centos 5.7

I have tried absolutely everything, without good results... yum always fails with "sqlite.bz2 File does not match checksum" for different repositories, every single time, but always with the above error. ive tried setting ... * http_proxy *…
DPI
  • 11
  • 2
1
vote
1 answer

Windows 2003 Std server sending ip packets with checksum 0

So I was just doing some server side troubleshooting on the network I noticed that 1 of the servers sends all packets with the IP level checksum set to 0. It caught my eye because in my wireshark capture, all packets (no matter what application…
Archit Baweja
  • 280
  • 7
  • 17
1
vote
1 answer

MediaWiki panic after modifying a file. Checksums maybe?

I've recently installed the latest version of MediaWiki on a dev server. I wanted to add some information on the edit page, and for this needed to modify an existing .php file to add in some more text. I used grep to find which file contained the…
n0pe
  • 363
  • 5
  • 13
1
vote
0 answers

Debian Bookworm Preseeding MD5 Checksum error

I have tried everything I can think of and different ways of calculating the MD5 but everytime the install comes back with Checksum does not match. Can anyone help me? This is my txt.cfg. The checksum I've got for the preseed.cfg below it is…
Colin Liew
  • 11
  • 1
1 2
3
4 5