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

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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
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0answers
129 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
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1answer
281 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
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1answer
103 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 ...
13
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3answers
26k views

How can I filter https when monitoring traffic with Wireshark?

I want to observe the HTTPs protocol. How can I use a Wireshark filter to do that?
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2answers
1k 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 > ...
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votes
1answer
254 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
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2answers
3k 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 ...
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0answers
120 views

Wireshark - view complete packet

I am trying to use Wireshark to capture some HTTP packets, but when the packet is too long, Wireshark truncates it in its window. The bottom window still shows the entire packet, but I am not able to ...
6
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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
492 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 ...
2
votes
2answers
325 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 ...
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2answers
457 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
2k 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 ...
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0answers
82 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
400 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
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0answers
102 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
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4answers
29k 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
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1answer
2k views

Understand wireshark capture for ssh key exchange

I need to understand SSH key exchange, I have tried to read RFC document but it seems very difficult to understand so I have captured packets using wireshark ,I found various packets for ssh ...
0
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1answer
153 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
104 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 ...
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0answers
203 views

Exporting SNMP OID values from wireshark capture?

I am trying to figure out how I can export the SNMP OID values that wireshark picked up. My issue is that when I export the raw data it is all together and not seperated. All I want to to is get only ...
30
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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
115 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 ...
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2answers
250 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
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1answer
131 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: ...
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2answers
138 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 ? ...
3
votes
3answers
16k views

Excessive 'TCP Dup ACK' & 'TCP Fast Retransmission' causing issues on network. What's causing this?

I'm getting excessive TCP Dup ACK and TCP Fast Retransmission on our network when I transfer files over the MetroEthernet link. The two sites are connected by one sonicwall router, so the sites are ...
0
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2answers
648 views

How can I create a packet capture file on a headless server for a single process?

I'm writing a python script on a headless server, and I'd like to see the packet capture output for the script. I can't run ettercap or Wireshark on the server as there is too much other noise ...
2
votes
1answer
341 views

Strange Ethernet II packets in wireshark

Looking at a wireshark capture, I'm seeing something really strange. Ethernet II packets with random data are being sent on the network. The larger packets in the capture seem to contain bits and ...
0
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2answers
99 views

Occasional Delay on Website Resources: Packet Loss Due to Bandwidth Cap?

My website loads more slowly than I think it should, due to a few of the assets taking an absurdly long time to download from the server. I've been trying to track down the cause of this. I'm about ...
0
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2answers
257 views

server sending hpoms-dps-lstn packets to unknown IP

I have a server running pacemaker with corosync and some standard services as mails, web, ssh... When I run wireshard in my network I keep getting those packets that my server is sending to the IP ...
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votes
1answer
259 views

How to monitor all network traffic [closed]

I have installled wireshark on my server but can only monitor traffic through the local nic but all network traffic does not go through the server. I would like to monitor all network traffic. Are ...
2
votes
1answer
4k views

tcpdump capturing tcp resets by host

I am trying to figure out where my tcp resets on my webserver happen. I have the following capture: tcpdump -fnni bond0:-nnvvS -w dump.pcap 'tcp[tcpflags] & (tcp-rst) !=0' When I look at the ...
0
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1answer
824 views

Wireshark - Capture syslog traffic form local workstation

I am using wireshark version 1.10.3 on windows 7 x64 enterprise. I am trying to capture all outbound UDP traffic, in particular syslog traffic. I have tried a capture filter UDP, but all I can see ...
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3answers
3k views

Can Wireshark capture an entire Ethernet frame including preamble, CRC and Interframe spacing?

I am examining an Ethernet frame in Wireshark. According to the "Ethernet frame" Wikipedia article and accompanying diagrams, "A frame starts with a 7-octet preamble and 1-octet start frame delimiter ...
0
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1answer
119 views

Network card capable of capturing a tonne of packets and not dropping them?

Edit: Our server is trying to capture packets at between 500-600Mb/s, but is dropping packets 'due to kernel'. Data is being written to SSDs, and isn't bottleneck there. What things should I look ...
2
votes
1answer
185 views

How to block own rpcap traffic where tshark is running?

Platform :- Fedora 13 32-bit machine RemoteMachine$ ./rpcapd -n ClientMachine$ tshark -w "filename" -i "any interface name" As soon as capture starts without any capture filter, thousands of ...
1
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1answer
224 views

“tshark: There are no interfaces on which a capture can be done” in Amazon Linux AMI

My goal is to capture packets with tshark in Amazon Linux AMI. While typing tshark in the command line there's an error: "tshark: There are no interfaces on which a capture can be done" How to ...
1
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0answers
119 views

NFSv3 Asynchronous Write Depends on Block Size?

I am trying to figure out if my NFSv3 deployment is performing SAFE asynchronous writes. I suspect that it is doing strictly synchronous writes, as I am getting poor performance in general. I used ...
1
vote
1answer
156 views

How can I measure the cumulative network usage of a process, from execution beginning to end

I want to measure how much bandwidth git pull uses, preferably by prefixing git command with desired program, i.e. nettally git pull Alternatively, is there some sneaky way to accumulate nethogs / ...
0
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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 ...
16
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2answers
32k views
2
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2answers
2k views

Wireshark filtering-trying to filter out my own local ip

i'm trying to filter out my ip address(local address) "192.168.5.22" I used "ip.src != 192.168.5.22|| ip.dst !=192.168.5.22"(without quotes) and I keep seeing my address pop up im in a heavy traffic ...
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 ...
0
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0answers
800 views

Window Size goes to zero

We are seeing an issue with our web servers where a client is doing a HTTP POST and sending xml files. We are seeing weird behavior where we are sometimes only receiving part of the data. (Sometimes ...
15
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4answers
6k views

Change protocol associated with port in wireshark

I'm trying to monitor some web traffic using wireshark. Our web proxy is on port 9191. How can I get the wireshark view to treat port 9191 just like port 80 - ie as HTTP. Just using Decode_As on the ...
1
vote
1answer
96 views

Wireshark not found after installing RHEL 5.5 [closed]

After installing Wireshark in RHEL 5.5 (32bit) with following command: yum install wireshark Wireshark not found: [root@localhost ~]# wireshark bash: wireshark: command not found What ...
0
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1answer
90 views

tshark duration of a conversation for a ip address

i can retrieve the follow info from a .pcap : ================================================================================ IPv4 Conversations Filter:ip.addr==1xx.1xx.0.1xx ...
0
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1answer
158 views

Wireshark - Difference between fixed parameters and tagged parameters

I'm new to Wireshark. I'd like to know what are fixed and tagged parameters and the difference between them. Web search didn't help. Kindly explain it to me in simple terms.