The tcpip tag has no wiki summary.
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0answers
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netstat showing too many connections (Established) [closed]
Possible Duplicate:
Too Many ESTABLISHED connection from a single IP address in Apache
netstat -ntp |grep 80
shows too many ESTABLISHED connection from single IP address. Around 300 of ...
4
votes
2answers
51 views
How do I fake dropped packets (or actually make them fail)?
Background
One of our clients suffers from an intermittant problem with their internet where it will drop packets when a user downloads a large file (their IT is looking into the problem).
I have ...
0
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3answers
90 views
Too Many ESTABLISHED connection from a single IP address in Apache
netstat -ntp |grep 80 shows too many ESTABLISHED connection from single IP address. Around 300 of them and it is not an attack and user is using a 2G connection to access Apache. This is the case ...
2
votes
3answers
78 views
Odd ping result on network
Can anyone explain why when I ping 192.168.23.019 it gives me a reply from 192.168.23.17?
Then If I ping .23.19 I get a request timed out reply. But I can RDP onto .23.19
These are virtual machines.. ...
3
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2answers
70 views
Unable to increase the dynamic port range on Windows Server 2008
I'm trying to "tune" the TCP/IP stack on some Windows Server 2008 machines by following the instructions here: ...
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1answer
34 views
Can a large number of network hardware interrupts cause a machine to be underutilized?
I don't know much about networking sorry.
I'm building a client / server where the server streams a lot of data to the client and I'm trying to maximise throughput (through TCP).
If I run both client ...
1
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2answers
42 views
Error Connection to SQL Server using [HOSTNAME]\instance or [FQDN]\Instance, [IP]\instance working
This one's kind of weird, at least to me.
I've got MSSQL server 2k5 (STD) installed on Server 2k3 R2 SP2 (on account of some legacy software that doesn't yet support x64 or Server 2008), using ...
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1answer
33 views
Routing to an external ip
I have a bunch of equipment (RTUs) that connect to a server to download data using a fixed ip and port. Due to change of ISP provider I need to change the ip of the server that handles these RTUs to ...
2
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3answers
219 views
How to automate DNS server reconfiguration for TCP/IPv4 and TCP/IPv6 in Windows 7?
I need to switch Internet Protocol Version 4 (TCP/IPv4) and Internet Protocol Version 6 (TCP/IPv6) settings for DNS server configuration from "Obtain DNS server address automatically" to hard coded ...
0
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1answer
111 views
Windows XP SP3 TCP/IP No buffer space available
I have the exactly same problem as here: Windows XP TCP/IP No buffer space available
On Windows XP Pro, SP3 if one does an experiment where one tries to open TCP/IP sockets in a loop (bascially, ...
3
votes
1answer
157 views
LVS Configuration issue (Using piranha Tool)
I have configured LVS on cent os using piranha tool .I am using vip of internal n/w as gateway for real server we have two NIC one having exteranl Ip and other for internal n/w which is on ...
0
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1answer
79 views
AFP / Apple Filling Protocol aka Netatalk access over Internet
I got a simple cloud server and thought it would be nice to have mac native afp
Volumes accesss. Installed Netatalk and this seems to work pretty nice.
No sensitive data or something but I don't ...
2
votes
1answer
65 views
Disabling Operating System TCP Management
Is there a way to disable TCP state management of OS, for example on a specific port, or on another ip or if not, disabling the whole tcp management and managing it in an application with root access?
...
2
votes
1answer
31 views
Using a broadcast or network ID as src IP in PPP?
In case of PPP, are we allowed to use any IP address including broadcast & network id as the source address?
For example:
192.168.1.0, 192.168.1.255?
One of the customer has configured a DHCP ...
1
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2answers
143 views
PING: timed out, host unreachable and succes all at once
Is there any logical explanation for this output? I can understand all of the three different results, but all three in one single run of PING?
Could my router be defective? I have no internet ...
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2answers
75 views
TCP and Ports Connection
Can more than 1 TCP connection be active at the same time between the two ports on two different host? Please answer.
2
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1answer
234 views
TCP/IP performance tuning under KVM/Qemu
With more and more companies switching to public cloud services, I'm curious what you guys' thoughts are on TCP/IP tuning in the cloud. Is it worth bothering with? Given that you don't have access to ...
2
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2answers
176 views
How do I prevent excessive ARP requests sent from Windows Server 2003?
OK, I've scoured the 'net already for possible solutions and have found none. Maybe you guys can help me.
I have a Windows Server 2003 setup, with a fixed IP on a routed LAN, standard /24 network.
...
0
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1answer
148 views
PC can't log into SQL Server on different peer network
I have a basic peer network (WORKGROUP) with PCs connected to sql server 2008 on a Windows 7 machine. I took one XP pc and the server home and connected to the server with no problems. When I plugged ...
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1answer
119 views
From TCP/IP network to IPX/SPX network? [closed]
Ok so can a computer from a TCP/IP network communicate with a computer from a IPX/SPX network? If so how will the routers handle the addressing scheme? And what if i wanna telnet that computer from ...
0
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0answers
117 views
How to change outgoing IP address for windows 2008 r2 server?
I have the following issue on my windows2008r2 server with this hotfix (http://support.microsoft.com/kb/2554859),
server has several IPs set to the one NIC, for example 1.1.1.1-1.1.1.5
By default for ...
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1answer
55 views
Where is a TCP/IP connection established?
When a TCP/IP Connection is established, is all handled at the network interface (NIC) level or does it also hit the OS kernel?
If so, is it expensive to the CPU (in terms of CPU cycles)?
3
votes
4answers
121 views
Determining cause of TCP/IP connect issue without traceroute
I'm trying to connect from a company network to a host (via HTTPS), but my attempts fail with timeout. I can resolve the host. I know the host is up. I know there is a firewall filtering by incoming ...
0
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0answers
64 views
How to inspect a socket's traffic class on Solaris
You get a bit of information about socket options with pfiles, for example
93: S_IFSOCK mode:0666 dev:344,0 ino:48867 uid:0 gid:0 size:0
O_RDWR|O_NONBLOCK
SOCK_STREAM
...
1
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1answer
254 views
How to optimize TCP / IP stack in Linux?
Currently I noticed there are about 15K open connections to localhost. It is mainly connecting to Memcached. I am clueless where I should start to optimize TCP/IP stack. Memcached support UDP, but ...
0
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0answers
115 views
Server 2003 - Cannot ping “unable to initialize sockets interface, error code 0”
I recently restored a Hyper-V backup for my 2003 server VM. Everything seems to be working but I cannot establish network connections. I am getting an error on ping "unable to initialize sockets ...
0
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1answer
46 views
Maintaining same TCP session, load balacing
With http live streaming (HLS) we need to deliver video segments one after other to the player to play them in a continuous fashion. Segments are present on many streaming servers and we would load ...
0
votes
2answers
390 views
why is TCP Connection state not changing from CLOSE_WAIT to CLOSED?
I have a client server application running in:
Server: Windows server 2008 R2 [Standard]
Client: Windows XP SP3
Workflow:
Server listens for client connections at port YY.
Client connects to server ...
0
votes
1answer
121 views
Windows 2008 blocked TCP connection
I have a strange problem that I don't know how to diagnose:
I have a small test application that tries to make a socket connection to an RTU on port 5001 (can't change this). The application works ...
6
votes
3answers
387 views
Where is the documentation that states TCP and UDP source port should be over 1024 and random?
I am having a hard time to find where it is documented that the source port should be random and in the range 1024-65535.
In which RFC is this documented?
Edit:
First reference for privileged ports ...
0
votes
1answer
113 views
Detecting TCP/IP connection drop issues in my application
I have a desktop application which talks to a server using TCP/IP. It was working before but now we are running into an issue. The log message on the server shows that the socket is disconnected after ...
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1answer
147 views
How does tcp keep a connection alive? [closed]
In http ( over tcp) there is a header which called keep "alive"
I dont understand how a connection can be open in tcp if all packets come from different
source ( router decision - over the internet)
...
1
vote
1answer
109 views
Multiple Homed Windows 2008 Server / Windows 7 Client
I have a small Windows 2008 network, with some Windows 7 clients. The clients are both laptops with docking stations and I would like them to communicate with the Windows 2008 server (for filesharing) ...
1
vote
1answer
65 views
Nmap reporting incorrect results from an idle scan
I have a VPS that I was scanning to make sure everything is in check. A regular SYN scan reports that ports 25 and 80 are open (which they should be). When I run an idle scan however, I get back that ...
0
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1answer
56 views
How to track down a Windows 7 networking problem
In my attempts to make a remote controlling a Windows 7 x64 machine perform better, it appears that I made things MUCH worse. Problem is, I undid all the changes I had made and the computer still ...
2
votes
1answer
290 views
Concerned about the content of ip_conntrack
Summary
Server OS: Debian Squeeze
Web Server: Apache2
IP Tables 'script': arno-iptables-firewall
There are 170 entries in /proc/net/ip_conntrack on the server. At present, 134 of those relate to ...
1
vote
1answer
155 views
Why won't sql server express 2008 service restart after I enable TCP/IP Protocol?
Whenever I enable TCP/IP connections on my SQL Server Express 2008 database server running on Windows XP SP3, I cannot restart the service, it simply states "The request failed or did respond in a ...
2
votes
1answer
114 views
Issues changing netmask from /24 to /22 on local network
We currently have a network, 192.168.1.0/24. We are close to being out of numbers.
If we change the netmask on our servers to /22 (255.255.252.0) all equipment (hosts) with 192.168.1.xx/24 will still ...
1
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2answers
82 views
Multiple systems with the same IP/subnet
Given multiple systems (embedded devices) on a LAN with a factory-set default IP of 192.168.1.1/255.255.255.0, is it possible to communicate with them using UDP broadcast and to receive an answer for ...
0
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0answers
37 views
connection monitoring application
Could you advise me some tool that allows to see traffic speed per connection? I have found currports tool, it's nice, but it doesn't show speed. Also I use Outpost Firewall for this purpose, but it ...
2
votes
2answers
310 views
What do all the settings in the Advanced TCP/IP Properties DNS Tab Mean?
Can someone explain TCT/IP > Properties > Advanced > 'DNS' tab please?
I know what DNS, primary DNS suffix and DNS suffix are, but this tab has some confusing properties.
3
votes
2answers
501 views
How do I set up IP over FC?
I have 2 systems, with a Broadcom BCM5701 and a LSI7202p, of which are connected with a LC->SC cable. The cards are properly detected in Linux, however I wish to set up IP over FC. I've read online ...
0
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2answers
81 views
how to implement elastic ip like architecture in private server farm
what are the ways by which I can implement elastic ip like architecture in my private server farm?
There is only one global ip available but I should be able to ssh any server from external network by ...
3
votes
1answer
41 views
Machine cannot communicate on local network any more
I have a machine that has a problem I've never seen and cannot understand.
The machine is a Dell laptop with Windows 7 Ultimate. The user tried to do something fancy with this machine (bridging the ...
1
vote
2answers
105 views
Solaris VM Experiencing Frequent Timeouts
We are having an issue with all of our Solaris VMs. The issue we're seeing is frequent timeouts when when connecting via SSH or HTTP. It only seems to affect initial connections... when I connect via ...
4
votes
3answers
435 views
Backups take so long that the firewall closes the connection
A bit of a mashup of systems here, so bear with me. Essentially, I'm having some trouble using the Backup Exec agent for Oracle, while trying to backup a remote Linux server. The BE agent appears to ...
0
votes
1answer
55 views
connection established, waiting
I work for some administration. We are responsible for app development, I'm personnaly responsible for the software application servers (Glassfish) and there is a team which manages the infrastructure ...
0
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1answer
392 views
Trying to get DNS services running on Windows Server 2008 R2, what am I getting wrong?
Ok, So I am basically trying to get a home server pc up that will provide Domain name services, act as Mail server and web server. I have one static IP, well it's not officially static but hasn't ...
4
votes
1answer
208 views
Behaviour of solaris tcp stack with relatively high RTT and bursty traffic
I have an application that is distributing data from New York to Tokyo over TCP running Solaris 10. Mean throughput is < 1Mbps, peak throughput can reach 20-30Mbps for seconds at a time though ...
1
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2answers
505 views
OpenVPN and TomatoVPN
Wondering if someone can help me with the following.
I have updated my Linksys router with TomatoVPN and used the following config:
Interface Type:TAP
Protocol:UDP
Port:1195
Firewall Custom
...
