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

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2
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1answer
150 views

Understanding LDAP traffic with ActiveDirectory

In looking at LDAP traffic through Wireshark I was curious to understand the conversation between the a windows client and Active Directory. Each conversation would vary to less than 80k bytes. But ...
-3
votes
1answer
85 views

Where to optain my client key for SSL decryption? [closed]

example.pcap is a traffic capture I have made on my local Linux box of and now I would like to decrypt it. tshark -o "ssl.desegment_ssl_records: TRUE" -o "ssl.desegment_ssl_application_data: ...
3
votes
5answers
8k 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 ...
3
votes
3answers
12k views

How can I configure Wireshark to list my dial up connection as a possible capture interface?

I am trying to monitor traffic coming into to my machine via an incoming dialup connection. I am using Wireshark with WinPCap 3.1 ( I rolled back to 3.1 from 4.0 because I read that this was the ...
0
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0answers
35 views

How to meet the arp table and the network toology with wireshark

I'm wondering if is possible meet(see) the arp table in a network traffic with wireshark or find some way to build manually the arp table, and how to see the router and swiches of topology( for ...
3
votes
1answer
89 views

Corrupt DNS requests

Sometimes in some network captures that include my DNS server, I find there are failed lookups for what seem like invalid requests. When viewed in Wireshark these show up with what looks like escaped ...
0
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0answers
47 views

upnp keep alive packet

I took a wireshark packet dump and Iam able to track the initial MSEARCH, SSDP out message to multicast IP etc., from my-device. but how do I see the incoming keep alive message from the other-device ...
2
votes
0answers
755 views

Troubleshooting Packet Loss on pfSense + Ubiquiti UniFi (Wireshark maybe?)

I'm dealing with an annoying situation in a small network in my church, which I'm the primary volunteer IT caretaker, of about 20 PCs, give-or-take. We're in Chattanooga, home of Gigabit internet, so ...
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 ...
0
votes
1answer
108 views

nmap repeats the scan to a specific port multiple time

I scanned a subnet (16 hosts) while dumping the network traffic with wireshark. I did it 2 times and I noticed that in the traffic there is the normal SYN-SYN/ACK and SYN-RST from open/closed port, ...
0
votes
2answers
759 views

Wireshark “length” column - what does it include?

Can anyone tell me what the "Length" column in WireShark refers to? I'm pretty sure it's the "size" of the entire frame on the wire. I did some calculations, but I didn't get the number that ...
1
vote
0answers
497 views

FTP Connection Suddenly hanging on 'waiting for welcome message'

We've had our FTP server (Proftpd) running on Ubuntu Server 12.04 for over 12 months now with no connection issues. In the last few days there have been issues with slow connections to the server, ...
0
votes
0answers
177 views

Wireshark: fully customized output from TShark?

I'm using TShark to analyze some packet capture logs and would like to produce some nice lists from the logs. I want the lists to be in text format, so they could be viewed/printed/etc. easily on ...
0
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0answers
60 views

Early tear down of communication

I have an application which performs an LDAP search which works in one domain but not in the other, when analyzing the packets sent between the application server and the domain controller being ...
2
votes
1answer
2k views

tcpdump not picking up traffic redirected by iptables

The following iptables rule is used to redirect all internet traffic coming in from eth1 to port 3000 at localhost (interface lo with ip 127.0.0.1): iptables -t nat -A PREROUTING -i eth1 -p tcp ...
-1
votes
1answer
99 views

Analyzing twitter packets [closed]

Thanks for your time. I'd like to find a way if a client has made a 'GET' or a 'POST' request for twitter. We are currently doing an educational project and we wanted to understand how we can achieve ...
1
vote
1answer
482 views

How can I write a filter to get tcp sequence number inconsistency?

I am using WireShark 1.12 and I am trying to filter SYN , SYN/ACK , ACK by inconsistencies. Would anyone know how to write a filter for this version? Currently I am using this: tcp.ack & tcp.seq ...
10
votes
5answers
20k 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 ...
-3
votes
1answer
200 views

How do I get statistics on HTTP traffic from Wireshark? [closed]

I have captured traffic with dumpcap and filtered http only with Wireshark. I want to see statistics about that http traffic. For example: requests grouped by method and URL, ordered by number of ...
1
vote
1answer
498 views

Can firewall block packets visible in Wireshark?

Wireshark shows that an RTP package is received on a PC. Is it possible that despite detection by Wireshark, something (firewall?) is still prevent the application listening to the required port on ...
0
votes
1answer
6k views

Convert .txt file to .cap to open it by Wireshark

I have packet in a text file how I can convert it to .cap file? I need to analyze this packet by Wireshark. Thanks
0
votes
0answers
96 views

Why am I getting ICMP traffic with wireshark DNS filter?

I am surfing the web and looking at dns traffic in wireshark with the "dns" filter active. When I ask for a non existant domain or subdomain I get a Destination Unreachable (Port Unreachable message). ...
3
votes
2answers
847 views

Why is Wireshark not capturing certain POST requests?

If I use this filter in Wireshark: http.request.method == "POST" and use the vote buttons to vote for a stack exchange question, then Wireshark captures the corresponding POST request. I can also see ...
3
votes
0answers
157 views

RTP analysis - Discerning ptime (packetization time) for a given VoIP packet capture

I would like some help on the subject of an automated way of discerning the average packetization time (ptime) of a VoIP call's packet capture. The reason I am not depending on the value in the SDP ...
0
votes
1answer
40 views

Is it possible to mimic the client of a https web service

There is such a windows application that communications with the server through https protocol, it is an auction tool and works only several hours per month. I have captured network packets (by ...
0
votes
1answer
24 views

Why am I seeing prefixed/duplicated packets coming from a comcast device?

I'm looking at traffic my CPE from Comcast in Wireshark, and for every packet, there is an additional packet that is the exact same, except for 4 additional bytes at the beginning of the frame ...
0
votes
0answers
86 views

wireshark not showing netflow source addresses nfdump does

Hi guys i'm experiencing following issue, hope someone can explain me what's happening. I got a pcap with a dump of udp packets containing netflow data. I've used tcprewrite and tcpreplay to ...
0
votes
1answer
22 views

See historical packet receipt statistics in Windows

I know this is a long shot, but it would be really useful to me right now. Does anyone know of a Windows function or 3rd party tool that can show stats about the receipt of packets on a network ...
1
vote
0answers
186 views

Can I use tshark to write SSL-decrypted packets to a file?

I have a PCAP file containing SSL-encrypted HTTP traffic and the private key from the relevant web server. I'd like a PCAP file that contains the decrypted HTTP traffic to feed into a different tool. ...
0
votes
1answer
385 views

SIP INVITE packet has WAN address rather than call manager LAN IP

I am using SIP between two subnets (192.168.3.0/24 and 192.168.30.0/24) each connected via VPN. I have a call server on 192.168.3.100, and two phones 192.168.30.118 (Ext. 3128) and 192.168.30.119 ...
2
votes
1answer
132 views

Intermittent switch failure and data flooding, hardware capacity?

We are using a switch (ZIO-SW500) connected to the building main network and we suffers from intermittent network halt. Normally the network works well. But, sometimes traffic designated to other ...
1
vote
2answers
2k views

TCPDump and IPTables DROP by string

by using tcpdump -nlASX -s 0 -vvv port 80 I get something like: 14:58:55.121160 IP (tos 0x0, ttl 64, id 49764, offset 0, flags [DF], proto TCP (6), length 1480) 206.72.206.58.http > ...
-5
votes
1answer
369 views

how to sniff from a remote machine? [closed]

I have a PC and a tablet that connected to a TP-Link ADSL modem. PROBLEM: I want to see the packets that send and receive from my modem not my PC( to see both wire and wireless packets) I search ...
1
vote
2answers
5k views

Wireshark TCP Window Size Value

I am debugging an application with Wireshark and watching the TCP Window Size value shrink on one side of the communication. If the packet's TCP section shows a "Window size value: 1", does that mean ...
6
votes
2answers
8k views

No interface available for Wireshark running on Ubuntu with wireless connection

I'm completely new to wireshark. I have Ubuntu on a Dell with wireless connection. When I go to Wireshark Capture Option, I cannot select any interface since no interface is listed. What is the ...
2
votes
2answers
641 views

Network flooded with seemingly empty packets

Let me preface this with the fact that I'm just a web developer at my company with little networking knowledge. Earlier today there was a department that lost all of their network connections so I ...
3
votes
2answers
441 views

Packets returning but traceroute fails

I get this output from traceroute: #traceroute -i eth1 -s 192.168.12.14 192.168.1.72 1 192.168.12.1 (192.168.12.1) 1.410 ms 2.076 ms 2.251 ms 2 * * * 3 * * * etc.. But in another terminal I ...
-1
votes
2answers
630 views

block all packets in windows 7 (so nothing appears in wireshark)? Can anything locally installed do it?

is it possible to block all packets in windows 7, so that nothing appears in wireshark? I have tried choosing Block all for incoming. for outgoing, I see it has no block all option, just a block ...
5
votes
4answers
3k views

Capturing multicast data with Wireshark with IGMP Snooping Enabled at the switch

I am trying to capture multicast traffic via Wireshark (actually TShark), however the switch has IGMP snooping enabled and will only send Multicast traffic on the ports that have an active IGMP ...
0
votes
0answers
109 views

ZyXel ES-2024 - Mirrored port showing duplicated traffic

I have a ZyXel ES-2024 PWD switch. I would like a computer plugged into port 26 to see all traffic that passes through port 2, both inbound and outbound. I have configured port mirroring for the ...
3
votes
1answer
605 views

Need help understanding capturing from Wireshark?

I am having issues with my FTP servers. Connecting, sending and receiving fail sometimes, and it is not consistent. I manage to capture and filter by IP the packets, I just need pointers on what can ...
2
votes
0answers
124 views

replay decrypted ssl traffic with tcpreplay

I have an pcap format from some https traffic from one of my web-servers. So I can use the key from my webserver to decrypt the traffic in wireshark. The problem I'm now facing is that I can't get an ...
8
votes
4answers
32k views

How do i convert wireshark capture files to text files?

How can I convert wirshark captures (.cap) files to text files or some format from which I can read the file and parse its contents ? Regards, Mithun
0
votes
1answer
194 views

Wireshark seems to ignore my filters

I'm trying to make use of Wireshark 1.10.6 for Windows and I want to only capture the traffic to port 443 (to diagnose some weird HTTPS problems I'm having). So I open Capture -> Capture Filters... ...
2
votes
2answers
138 views

EC2 hosting, trying to understand network security model

We are hosting few virtual machines at amazon. Security groups and other configurations are set up to allow access only from desired addresses and to desired parties. The machines do talk with each ...
30
votes
3answers
2k views

ISP broadcasting all IP-packets, so I can see traffic of other clients from ISP

Recently I wondered why my router shows a constant downstream of 5 MBit/s, while I am downloading almost no data. I discovered the "packet logging" function of my router, with which I was able to log ...
2
votes
2answers
129 views

How can I get a list of the ports that Wireshark knows?

When I need to choose a new port to use (internal to an organisation) I used to look in /etc/services. This is no longer sufficient, as Wireshark knows about many other ports that are not in ...
1
vote
2answers
341 views

Can I capture ISP SNMP information with Wireshark?

I am trying to do some heavy digging into SNMP, BPI+, ISP networks. Since wireshark can be used to capture network data, would I be able to use it to remotely capture my ISP SNMP agent information and ...
0
votes
1answer
141 views

Linux unfriendly IIS/ASP.NET :-) : Quick download on windows but slow on linux [closed]

This particular web site (gops.tay.be) serves objects quick if I try to request the page using windows, but I get them very slow if trying using linux. There is no difference if I use browser or curl: ...
0
votes
2answers
160 views

Caculating packet offset

In Wireshark, if I want to write a filter which accepts only ICMP destination unreachable ( type 3 ) messages, the filter is icmp[0] == 3 . How do I count the packet offset of 0 in this instance ? ...