KS-Soft. Network Management Solutions
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister    ProfileProfile    Log inLog in 

Detecting TCP checksum errors

 
Post new topic   Reply to topic    KS-Soft Forum Index -> IP-Tools
View previous topic :: View next topic  
Author Message
jsavage



Joined: 16 Nov 2004
Posts: 2

PostPosted: Tue Nov 16, 2004 3:29 am    Post subject: Detecting TCP checksum errors Reply with quote

Can IP Tools be used for detecting any occurances of TCP Checksums being incorrect with respect to the pseudo header + payload ?

If not, what tools are recomended for A. checking for such errors and B. generating test packets that can be used to demonstrate the tool ?

James Savage
Back to top
View user's profile Send private message
KS-Soft



Joined: 03 Apr 2002
Posts: 12791
Location: USA

PostPosted: Tue Nov 16, 2004 2:24 pm    Post subject: Reply with quote

IP-Tools can provide information about invalid incoming TCP packets ("Local Info" utility -> "Statistics" -> "TCP" -> "Incoming Errors" counter).

But you need to detect such packets in automatic mode, right?
In this case you may use Advanced Host Monitor http://www.ks-soft.net/hostmon.eng/index.htm
Use "SNMP Get" test method with OID=1.3.6.1.2.1.6.14.0

On the other hand, if you need to see detailed information about TCP packets, our tools cannot help you.
You need some sort of sniffer...
I think this list will be useful http://www.snapfiles.com/Shareware/network/swpacketsniffer.html

Regards
Alex
Back to top
View user's profile Send private message Visit poster's website
jsavage



Joined: 16 Nov 2004
Posts: 2

PostPosted: Wed Nov 17, 2004 11:16 am    Post subject: Reply with quote

Thanks for that. I have taken a look at Advanced Host Monitor but am a little over awed by it at the moment. I can only see SNMP, SNMP Trap and SNMP test so how do I specify 'Get' ? Presumably I set the alert to monitor the Oid you mentioned but what should I compare it to ?

James
Back to top
View user's profile Send private message
KS-Soft



Joined: 03 Apr 2002
Posts: 12791
Location: USA

PostPosted: Wed Nov 17, 2004 2:47 pm    Post subject: Reply with quote

"SNMP" and "SNMP Get" is the same test method

Quote:
Presumably I set the alert to monitor the Oid you mentioned but what should I compare it to ?


Compare to previous value using "increase by" option of the test.

Regards
Alex
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    KS-Soft Forum Index -> IP-Tools All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group

KS-Soft Forum Index