• AS/400 TCP/IP: Port numbers

    What are the different port (numbers) used by AS/400 for remote connection using HTTP connection.

    Naveens140 pointsBadges:
  • Networking: How to step through a TCP/IP stack

    I was a recent QA engineer that worked for a proprietary embedded operating system. My company built a ATN stack and I have to admit, the best moment I had there was stepping through it with a debugger (eye-opening network moment). Just watching each layer build their part of the packet was...

    ITKE54,720 pointsBadges:
  • Why is a TCP/IP reset RST flag being sent?

    Over the past several days, I can't seem to figure out why my application's TCP/IP connection is basically "hiccuping" every 10 minutes or so. After running Wireshark, I realized the other end is sending a packet with the reset RST flag set (after 10 minutes of inactivity). From what I've read,...

    ITKE54,720 pointsBadges:
  • How to code RAW Berkley sockets on TCP/IP?

    How does one create RAW Berkley sockets on TCP/IP? I’ve read a few tutorials, but all seem to be overwritten. I’m looking for the easiest and most straightforward way to do it.

    ITKE54,720 pointsBadges:
  • What layer of the TCP/IP would ARP and RARP belong to

    ARP translates Layer 3 addresses to Layer 2 addresses, and knowing fully well that it is not an IP-only or Ethernet-only protocol. Can anyone help with this, it's getting a bit confusing.

    Freshfall5 pointsBadges:
  • Windows 7 must restart print spooler every morning in order to print

    We are currently deploying Windows 7 64bit PCs within our organization. Some of the computers need to have their print spoolers restarted in the mornings or else they won't print. After the spooler has been restarted they seem to print fine. We deploy printers via Group Policy from Windows 2003 and...

    erin0201215 pointsBadges:
  • How can a general user trace the origin of TCP/IP data generated by persistent e-mail anomaly?

    Thank you very much for taking time to consider this question. What do you recommend for a general user who needs to trace the origin and route of TCP/IP data associated with an e-mail message? My SOHO computer is infected by some form of malware. The ISP's tech support could not resolve it; the...

    Troubleshoot201415 pointsBadges:
  • Testing stateful firewall with TCP/IPv6

    This may seem as a general question but I'm wondering how experienced users actually test "stateful firewall" with TCP/IPv6. I would include these two tests:Echo reply without requestTCP ack without synIs there anything else other than this? Especially that pertains to IPv6?

    ITKE54,720 pointsBadges:
  • Detecting / Reacting to DNS tunnels

    Lately, I've been seeing a lot of talk discussing TCP/IP over DNS requests (usually because port 53 UDP is open and unfiltered). What techniques are out there to detect and block such tunnels? Have you seen such tunneling on a network before?

    ITKE54,720 pointsBadges:
  • Sending a one-bit message through a Citrix session

    We have several programs that are running both locally / on a Citrix session. We need to send a one-bit message from the program, which is running locally, to the program running on the Citrix session.We've thought about these options: Utilizing TCP/IP Utilizing the shared clipboard to briefly send...

    ITKE54,720 pointsBadges:
  • AS/400 TCP/IP error

    Hi, while connecting to the AS/400 from my local system its throwing the error socket error function error CWBC01003 in AS/400. How can I be able to resolve the problems?

    Naveens140 pointsBadges:
  • TCP/IP in Windows Server

    IP of my Windows Server 2003 are not displaying in status.

    Winners10 pointsBadges:
  • Analysis and prevention of Flooding attack by using TCP/IP or UDP programs or any other software

    Hi, I'm doing my final year project on flooding attack. In this, I want to do analysis and then prevention of flooding attack with the parameters known as 1. Packet size 2. Rate of transmission 3. Bandwidth What do I do from this? Please help me.

    Classes10 pointsBadges:
  • TCP/IP

    I am getting this error on TCP/IP connection. Emails are not going out from AS/400 "2 = TCP connection closed due to R2 retry threshold being run."

    Msatbh85 pointsBadges:
  • Strange DNS resolution.

    Hello. This week one of our AS400 got me all surprised. I do not know what to do, where to look, so I would like to ask here...just in case. On this AS400, among others there are four host table entries. These entries are set to 2.xxx.xxx.xxx addresses. The DNS has 9.xxx.xxx.xxx addresses. Customer...

    Champs60 pointsBadges:
  • iSeries AFPDS printing to an IP printer is not supporting images to IP printer.

    I am attempting to eliminate several pre-printed forms by using AFPDS, however I am running into a problem printing images. I first encountered the problem in trying to shade boxes. After research revealed that box shading is actually an image, I tried adding our company logo, confirming that I am...

    Len5 pointsBadges:
  • Various Ethline failures

    We have moved 15 of 20 AS400 / iSeries to a new business DMZ.  The five systems that fail range from OS level V4R5M0 to V5R4M0 and system types 50S to 520.  Some failed systems are LPARs where half the systems of the LPAR are functioning with their new IPs while the other half fail.  The failed...

    Wwillett45 pointsBadges:
  • Device setup with static tcp address

    How do I add a static IP address to a device on AS400? I have just been handed this problem and have never dealt with device communications. The device is a handheld PC connecting through 5251 telnet (static address) from a remote location through a communications link.

    Ace910 pointsBadges:
  • TCP/IP protocol suite Ebook

    Hello sir, I want to know each & everything abt TCP/IP protocols. e.g security problem with TCP/IP protocol.etc. Plz suggest me any good ebook/pdf base on TCP/IP protocol suite. Thanks u sir for provide me CCNA security information. Thanks.

    Citiusaltius4tius60 pointsBadges:
  • Don’t Fragment bit

    Could anybody please explain me about the data transfer when Don't fragment bit is set and incoming protocol is TCP/UDP?

    Techy001325 pointsBadges:

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