Wireshark is a open source Network Protocol Analyzer under GNU License.

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5
votes
3answers
271 views

What causes a switch port to receive data not destined for it?

We are having an intermittent fault which is effecting one of our control systems on one of our HP Procurve switches. For some reason, this PLC (10mbit port - 192.168.6.56) which is attached directly ...
0
votes
2answers
747 views

Seeing traffic destined for other people's servers in wireshark

I rent a dedicated server from a hosting provider. I ran wireshark on my server so that I could see incoming HTTP traffic that was destined to my server. Once I ran wireshark and filtered for HTTP I ...
-3
votes
1answer
97 views

Inspecting the E-mail traffic of a Windows Server 2008 R2 [closed]

I have seen that the IP address of my mail server has added to blocked IP address list on http://psbl.org. I am using this server for personal use. So, it is not that much of an issue that I am, as a ...
5
votes
1answer
2k views

Client not getting address from some DHCP server

I'm working on some embedded devices which should be connected to a large network (hundreds of devices) via ethernet and that should be configured using the DHCP protocol. What I'm experiencing is ...
0
votes
1answer
630 views

Capturing network traffic (rtmp) between VMs or using loopback in the same VM using wireshark

I need to to capture RTMP traffic between two virtual machines (server and client) or atleast have the server and client on the same machine and capture the traffic. I am able to capture the traffic ...
1
vote
2answers
189 views

Capture SMTP traffic over long time period

We have an SMTP relay (just an XP box with SMTP) on our network. It's hanging around because some legacy apps used to use it so send emails from code. It hardly gets any traffic, I can see from the ...
3
votes
1answer
235 views

How Wireshark could read data from other ips

When I open wireshark I could see the packets send by machines other than mine. How could its possible? Example 8252 99.150192 somoeneip 239.255.255.250 SSDP NOTIFY * HTTP/1.1 8253 ...
5
votes
1answer
2k views

Can WireShark detect Ethernet PAUSE packets on network when running on Windows?

We have a Windows server which is connected to a switch processing a large quantity of data. We noticed that when we disabled FlowControl on the network adapter, that it appeared that we were getting ...
7
votes
2answers
3k views

tcpdump: snaplen set to 0 but still get “Packet size limited during capture”?

Due to this problem, I'm going to sniff some packets on the MySQL server backend to see what happens: # tcpdump -vv -s0 -c 100 -i bond0 tcp port 3306 and host 192.168.3.87 -w ...
1
vote
0answers
80 views

Divert TCP connection

I am trying to divert a TCP connection. Given a client (C) which is connected to a router R and two servers (S1 and S2) are connected to the router, C initially connects to S1. I am trying to write an ...
3
votes
1answer
392 views

What are capture interfaces in Wireshark?

I am really new to Wireshark, and I am little confused about the term capture interface. I see a list of about 9 to 10 so-called interfaces. What are they? I mean, I have only one Ethernet interface ...
1
vote
4answers
2k views

Sniffing packets of specific binaries / apps / process id?

Is there a way to associate packets with executing binaries? I would be open to traditional sniffing methods or even dtrace for that matter. I have a specific issue on a system with very high ...
0
votes
6answers
1k views

Wireshark running all the time [closed]

Would this cause an issue eventually or is always ok to leave running. SHould it's logs be saved every no and again and if so when?
1
vote
1answer
205 views

Wireshark, using “Decode as”, BACnet is missing as a choice

I'm trying to decode BACnet traffic that was sent on a non-standard port. It looks like I should be able to click "decode as" and choose BACnet or BACapp, but they don't appear in the selection list. ...
5
votes
3answers
13k views

How do I install Wireshark in Red Hat Linux?

How do I install Wireshark in Red Hat Linux? At the Wireshark download page, am I supposed to download "Standard package" for Red Hat under "Third-Party Package"? Does the Red Hat version have a ...
2
votes
1answer
536 views

Is Winpcap able to capture all packets going through a Gigabit NIC without missing any packets?

I want to use Winpcap to capture all network packets going through a Gigabit NIC of a server. Assuming that I am able to utilize the network link up to 100%, the maximum network speed is 1000Mbps. If ...
3
votes
3answers
1k views

TCP segments of an HTTP Request in wrong order

My web-services server sometimes does not receive correct HTTP requests and returns "500 - Internal Server Error". Using tcpdump and Wireshark on the server, I found out that HTTP requests are ...
2
votes
4answers
1k views

Extremely high arp fllooding from the router

My subnet is 10.162.0.0/16. We have a router with a couple of interfaces. Gateway for my subnet is 10.162.0.1. The router is situated in another building and I haven't direct access to it. Line from ...
1
vote
1answer
945 views

How can I find out the source of arp request if it is in another subnet?

Our subnet is connected with other subnets with router. Using wireshark I see some arp requests coming to ip addresses of our subnet from the router. Such as Broadcast ARP 60 Who has ...
3
votes
1answer
1k views

huge packet loss and checksum errors

Our 2008 server began to work very slowly within 2 weeks. Our web sites (iis 7.5) are loading very slowly and sometimes its freezing. We began testing with wireshark and saw that our packets are ...
0
votes
1answer
600 views

Router is continually broadcasting the same ARP request, with the exact contents

I hope the question is clear and that this is correct place to post the question. My router is broadcasting the same ARP frame over and over (once every second). It's probably not a big deal, but I ...
3
votes
2answers
688 views

How to separate PCAP by unique IP address

I have an hour long PCAP file which has about 60 individual network attacks done on our test network here at work. Each attack comes from a unique IP address which was not used elsewhere during the ...
1
vote
0answers
316 views

Creating keytab for computer account to decrypt packet capture

We are having an issue with our blackberry server (EWSTest fails at autodiscover lookup) and I am running a packet capture with Wireshark in an attempt to diagnose the issue. There is a conversation ...
-1
votes
1answer
1k views

Stealing internet by changing MAC address? [closed]

OK - I have a static IP - and I have been on the same provider for years - its a wired network (a cable goes directly to my network card) - and the cable is connected to a switch on a pole in the ...
4
votes
2answers
2k views

syn/ack sequence number confusion

I was looking at some random traffic in wireshark and came across this (using relative seq/ack numbers): 1. myIP -> 74.125.227.96 [SYN] seq=0 2. 74.125.227.96 -> myIP ...
2
votes
2answers
16k views

How to monitor VPN traffic with Wireshark on Windows 7?

I'm running Wireshark 1.6.7 (latest available release) x64 on Windows 7 x64. I only have a single network card on this computer, and Wireshark shows only it as an available adapter to capture packets ...
0
votes
1answer
715 views

Wireshark/encryption and openvpn

I have a linux openvpn router and a home dsl modem. The dsl modem has port 1234 open and forwards it onto eth0 on the linux router. I can connect to the router from a remote location no problem. All ...
1
vote
1answer
3k views

Why Wireshark does not recognize this HTTP response?

I have a trivial CGI script that outputs simple text content. It's written in Perl and using CGI module and it specifies only the most basic headers: print $q->header( -type ...
-1
votes
1answer
259 views

Checking HTTP response for website using Wireshark

Is there a specific way to know if the file that we download through a web server (e.g.: Java) can be verified through Wireshark? I want to check if the file is working perfectly from internal and ...
0
votes
1answer
548 views

wireshark windows - how to remote capture/analyze from a tshark or similar install?

I would like to set up some small, low-end hardware wireshark capture points on my network. I am hoping I can use something like command-line linux (ubuntu mini for example) to keep it light-weight. ...
1
vote
1answer
637 views

how to generate the graph in wireshark?

$ sudo tshark -i eth0 -R 'http.request.method == "GET"' "port 80" Running as user "root" and group "root". This could be dangerous. Capturing on eth0 5.641015 10.53.0.66 -> 209.85.143.104 HTTP ...
0
votes
2answers
5k views

NBSS Continuation Message - Wireshark - Definition?

Looking at a capture and seeing a "NBSS Continuation Message" port 445, but I cannot find any reference anywhere to what this might mean. I assume it's a normal message for the NetBIOS Session ...
1
vote
6answers
4k views

How to record SIP traffic / calls for future auditing?

We have a VOIP (SIP?) phone system and have to record all calls for specific phones in the company. It may be required at a future date to listen to these calls for auditing. These phones happen to ...
9
votes
5answers
17k views

How can I sniff the traffic of remote machine with wireshark?

I can sniff the traffic of my local pc but I would like to know how to I sniff the traffic of a remote machine by wireshark? When in capture option I select remote interface and enter my remote ip ...
4
votes
1answer
524 views

how to view hostnames in traffic entering my webserver (Apache)?

Is there any way I can view the hostnames used by incoming traffic that is accepted by my apache webserver? For example, say the webserver is set up to process incoming traffic for an IP address, ...
1
vote
1answer
294 views

PCAP to Syslog utility

I am looking for a tool which sniff all the traffic on an interface and produce a syslog like Cisco log in real time. Example : Feb 16 10:19:05 tcp S.S.S.S(6083) -> D.D.D.D(80), 1 packet Feb 16 ...
1
vote
2answers
1k views

Can't decrypt imaps traffic in Wireshark

I have currently problems to decrypt IMAPS Traffic in Wireshark. I set up the SSL Key with the correct IP Address, Port 993 and Protocol imap. The Key is the correct one. That is what I see in the ...
2
votes
2answers
2k views

Is there some capture filter (or alternatives) that is especially useful for wireless capture?

I'm capturing wireless traffic in monitor mode with WireShark. I want to capture traffic only for a certain BSS. While wlan.bssid == xx:xx:xx:xx:xx:xx works well as a display filter, I don't want my ...
1
vote
0answers
113 views

Why adding capture filters breaks the traffic dump in wireshark / windump?

I have a strange issue while trying to capture RTP (UDP) traffic. I have a phone using IP 192.168.9.4 and a Windows 2003 PC connected to the same switch (actually to the monitor port of the switch - ...
2
votes
1answer
139 views

CouchDB plugin for Wireshark?

I am trying to understand CouchDB network traffic with Wireshark and find it very difficult. A simple transaction with plain-text content seems to result in many lines in Wireshark, most of them ...
2
votes
1answer
1k views

Debugging slow SMB packets from a specific desktop client

I'm having some serious problems locating a slowdown, and I hope you could assist me with this. We have an office network with ~50 clients and a main file server running Windows Server 2008 R2 ...
1
vote
0answers
266 views

Wireshark like app for embeded Windows CE

Greetings Im looking for a standalone wireshark like app that I can run on a embedded Windows CE device in order to debug some network issues. Is anyone aware of such a thing. I know version 5 has ...
2
votes
1answer
3k views

Wireshark - Filter for Inbound HTTP Requests on Port 80 Only

We are integrating with an outside company in which we have had to make certain IP and port restrictions. First, I am novice at network administration, so If I butcher anything, please forgive me. ...
0
votes
1answer
273 views

What is Reverse Gossip Transfer Protocol?

Playing with wireshark, I see a bunch of packets that say something like rgtp > https [ACK] Seq=???? Ack=?????? Win=????? Len=0 What is a Reverse Gossip Ttransfer Protocol? What is it used for, ...
0
votes
2answers
372 views

Needs help to understand the wireshark results of a data transferring

In my LAN, I have a router that runs a Samba server and my PC connects to the router. I wiresharked during uploading a file from my PC to the samba server. Below is a shortcut of the wireshark ...
3
votes
5answers
7k views

Wireshark filter to only capture Incoming Packets?

I am trying to setup a Filter (so my log files aren't massive) that will capture only incoming traffic. I have looked on http://wiki.wireshark.org/CaptureFilters but so far have been unable to find a ...
1
vote
1answer
1k views

Configuring Wireshark for Rolling Captures during DDoS Attack

We have been getting hit with DDoS Attacks on various machines for months. The datacenter either null routes or sets up an ACL for us. However, it just came to my attention there's a tool floating ...
0
votes
1answer
200 views

Communication problems on secondary interface tap0

I am using UDP over ipv6 as communication stack. I have network client running on secondary virtual interface tap0. It generates messages for server which is supposed to run on the same interface but ...
1
vote
1answer
407 views

Catalyst 3560G SPAN session not mirroring IGMP packets

I am developing a device which acts as a multicast host, and want to observe it as it responds to IGMP Queries. My Catalyst 3560G is set up as follows (full config below): Port 0/1 is a TFTP server ...
1
vote
7answers
4k views

Firewall blocks traffic - how to find out what ports / ip addresses are used by software?

Well I get a "host was not accessible" error when trying to use a software. I don't know which port they use nor which address they are trying to reach. Is there a more or less easy way to figure that ...