r12: 0x00000004, sp : 0x0775fcec, lr : 0x079de7e4 Stack dump:
5da89306 c33613f4 c330cfc5 04411507 45515a49 86619f8b c0db0a81
4e395861 cb25b796 e3108934 932766c5 4dcff9e9 711c3463 b9cd5d1e
52149961 9324dea3 d340dc25 15458610 63582ded 689a0c54 dfb43131
02c7d971 a0ebb72c bfaae832 db216923 08ba693b 95e4de97 98d121a2
'
'
Although
dconsole
output may be difficult to interpret by the administrator, it can be emailed to
D-Link support representatives for further investigation.
The
dconsole
command supersedes the
crashdump
command found in earlier versions of
NetDefendOS.
Dconsole can also be run in the Web Interface by going to:
Status > Maintenance > Diagnostic Console
Selecting this option runs
dconsole
automatically and the output is immediately displayed in a
text box. The contents of the text box can be copied and pasted into an email for review by
support personnel. Pressing the Refresh button will run
dconsole
again and display the new
output in the text box.
2.6.6. The pcapdump Command
A valuable diagnostic tool is the ability to examine the packets that enter and leave the
interfaces of a NetDefend Firewall. For this purpose, NetDefendOS provides the CLI command
pcapdump
which not only allows the examination of packet streams entering and leaving
interfaces but also allows the filtering of these streams according to specified criteria. Only the
pcapdump
CLI command usage is described in this section but its functions are also duplicated in
the Web Interface.
The packets that are filtered out by
pcapdump
can then be saved in a file of type
.cap
which is the
defacto
libpcap
library file format standard for packet capture.
The complete syntax of the
pcapdump
CLI command is described in the
CLI Reference Guide
.
A Simple Example
An example of
pcapdump
usage is the following sequence:
gw-world:/> pcapdump -size 1024 -start lan
gw-world:/> pcapdump -stop lan
gw-world:/> pcapdump -show
gw-world:/> pcapdump -write lan -filename=cap_lan.cap
gw-world:/> pcapdump -cleanup
Going through this line by line we have:
1. Recording is started for the
lan
interface using a buffer size of 1024 Kbytes.
gw-world:/> pcapdump -size 1024 -start lan
2. The recording is stopped for the
lan
interface.
gw-world:/> pcapdump -stop lan
3. The dump output is displayed on the console in a summarized form.
gw-world:/> pcapdump -show
4. The same information is written in its complete form to a file called
cap_lan.cap
.
Chapter 2: Management and Maintenance
126
Содержание NetDefendOS
Страница 30: ...Figure 1 3 Packet Flow Schematic Part III Chapter 1 NetDefendOS Overview 30 ...
Страница 32: ...Chapter 1 NetDefendOS Overview 32 ...
Страница 144: ...Chapter 2 Management and Maintenance 144 ...
Страница 220: ... Enable DHCP passthrough Enable L2 passthrough for non IP protocols 4 Click OK Chapter 3 Fundamentals 220 ...
Страница 267: ... SourceNetwork lannet DestinationInterface any DestinationNetwork all nets 4 Click OK Chapter 3 Fundamentals 267 ...
Страница 284: ...Chapter 3 Fundamentals 284 ...
Страница 360: ...The ospf command options are fully described in the separate NetDefendOS CLI Reference Guide Chapter 4 Routing 360 ...
Страница 392: ...Chapter 4 Routing 392 ...
Страница 396: ...Web Interface 1 Go to Network Ethernet If1 2 Select Enable DHCP 3 Click OK Chapter 5 DHCP Services 396 ...
Страница 419: ... Host 2001 DB8 1 MAC 00 90 12 13 14 15 5 Click OK Chapter 5 DHCP Services 419 ...
Страница 420: ...Chapter 5 DHCP Services 420 ...
Страница 424: ...2 Now enter Name lan_Access Action Expect Interface lan Network lannet 3 Click OK Chapter 6 Security Mechanisms 424 ...
Страница 573: ...Chapter 6 Security Mechanisms 573 ...
Страница 575: ...This section describes and provides examples of configuring NAT and SAT rules Chapter 7 Address Translation 575 ...
Страница 607: ...Chapter 7 Address Translation 607 ...
Страница 666: ...Chapter 8 User Authentication 666 ...
Страница 775: ...Chapter 9 VPN 775 ...
Страница 819: ...Chapter 10 Traffic Management 819 ...
Страница 842: ...Chapter 11 High Availability 842 ...
Страница 866: ...Default Enabled Chapter 13 Advanced Settings 866 ...
Страница 879: ...Chapter 13 Advanced Settings 879 ...