tcpdump and connection troubleshooting Post: 302183536

7 More Discussions You Might Find Interesting

1. Programming

How To Use tcpdump

I have two net-card. one is 172.16.24.99(ENG) ,another is 172.16.25.99(ENG-B). Both masks is 255.255.255.0. I will monitor data on the tcp port 8055 in ENG, How do I set option of tcpdump command

2. Cybersecurity

i would like to know about tcpdump

i would like to know about tcpdump i would like to use tcpdump to get information about these - Date - time - source hostname - source mac address - source ip address - destination ip address - see outbound only then i use command like this tcpdump -i le0 -n -q -tttt -e src net...

3. Solaris

Solaris 10 ftp connection problem (connection refused, connection timed out)

Hi everyone, I am hoping anyone of you could help me in this weird problem we have in 1 of our Solaris 10 servers. Lately, we have been having some ftp problems in this server. Though it can ping any server within the network, it seems that it can only ftp to a select few. For most servers, the...

4. Ubuntu

[TCPDUMP] Connection lost

I'm on Ubuntu – but it's the same on Debian. I'm using tcpdump in order to track the connection of computers on my private network. At some point, the internet connection of the computers launching the script is lost as well as the targeted computers. Here's the command line: tcpdump -i wlan0...

5. UNIX for Advanced & Expert Users

How keep running a program n an another computer via a connection ssh when the connection is closed?

Hi everybody, I am running a program on a supercomputer via my personal computer through a ssh connection. My program take more than a day to run, so when I left work with my PC I stop the connection with the supercomputer and the program stop. I am wondering if someone know how I can manage...

6. Debian

Tcpdump Help !

Hi. Need Help with TcpDump Trying to sniff associatio-request with tcpdump but when i run this tcpdump -i eth0 wlan subtype assoc-req i get this error can anyone help me with this error ? Thanks alot !!:)

7. IP Networking

TCPdump

I've recently started learning to use TCPdump, and I find it pretty interesting. There's one thing I don't understand. When I tell it to capture packets on, say, the WiFi interface en1, it often captures packets sent or received by other hosts on the network. How can it do this? My...

LEARN ABOUT NETBSD

irip

IRIP(4) 						   BSD Kernel Interfaces Manual 						   IRIP(4)

NAME

     irip -- Raw IP over ISDN network driver

SYNOPSIS

     pseudo-device irip count

DESCRIPTION

     The irip driver interfaces the IP subsystem of the operating system with the ISDN layer so that transport of IP packets over an ISDN link is
     possible.

     The driver just packs IP packets without anything appended or prepended into raw HDLC packets on the B channel and transfers them to a remote
     site.  IP packets received from the remote site are queued into the local IP protocol stack.

     The format of the resulting packet on the B channel is:

	   (HDLC opening flag) (IP-packet) (CRC) (HDLC closing flag)

     In the case where an IP packet for a remote site arrives in the driver and no connection has been established yet, the driver communicates
     with the isdnd(8) daemon to establish a connection.

     The driver has support for interfacing to the bpf(4) subsystem for using tcpdump(8) with the irip interfaces.

     The driver optionally (when compiled with the IRIP_VJ option) provides Van Jacobson header compression, under control of the link0 and link1
     options to ifconfig(8):

	   link0	    Apply VJ compression to outgoing packets on this interface, and assume that incoming packets require decompression.
	   link1	    Check incoming packets for Van Jacobson compression; if they appear to be compressed, automatically set link0.

     The default values are on for link1 and off for link0.

SEE ALSO

     bpf(4), isdnd.rc(5), isdnd(8), tcpdump(8)

AUTHORS

     The irip device driver and this man page were written by Hellmuth Michaelis <hm@kts.org>.

BSD
								   July 6, 1998 							       BSD