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+++++++++ Thank you very much for taking the time to explain the gdipc -g option. Unfortunately, I am still having the same problem. Apparantly, my problem stems more from my inability to define the correct firewall filter/forwarding rule rather than the gdipc configuration. If you have some example of how the rule needs to be set up to do the correct forwarding, I would really appreciate it. I am somewhat new to configuring filter rules. I have done straight port forwarding, but based on your description, it appears I need to redirect one port to another (i.e. filter rule?). I am using a Netgear RP114. The corrective action I have taken based on your message was to open a second port in my firewall and forward that port to the machine running the 'gdipc -g' command. On my Netgear router, it appears as such: Menu 15 - SUA Server Setup Rule Start Port No. End Port No. IP Address --------------------------------------------------- 1. Default Default 0.0.0.0 2. 3645 3646 10.10.22.2 Note: I have tried both defining a range ( 3645 -> 3646 ) and individual ( 3645 -> 3645 && 3646 -> 3646 ) forwarding definitions. I have also tried defining the filter rule: Menu 21.4 - Filter Rules Summary # A Type Filter Rules M m n - - ---- ---------------------------------------------- - - - 1 Y IP Pr=17, SA=10.10.22.2, SP=3645, DA=0.0.0.0 N N N 2 Y IP Pr=17, SA=0.0.0.0, DA=0.0.0.0, DP=3646 N F N And in /winnt/system32/drivers/etc/services: gnudynipsend 3645/udp gnudyniprecv 3646/udp The output still appears as such: F:\Software\gdipc>gdipc -g 3645:3646 ==== gdipc.bat running: Sat Mar 23 06:53:15 2002 ==== Configuration file name: F:/Software/gdipc/gdipc.conf.txt Cache file name: F:/Software/gdipc/gdipc.cache.user.zeropain.com.txt Address validation failed for 24.136.122.212 - UDP packet timed out Attempting update at zeropain.com ... Update to address 24.136.122.212 from 24.136.122.212 successful for user.zeropain.com ============================================================== Apparantly, no matter how I define my port filtering/forward, I am getting the same response back (updating the address of the GnuDIP server correctly, but not being able to determine it hasn't changed). I have trolled some newsgroups for postings on this, but I haven't found an example that I understand will do what I need to do to use gdipc. Thanks for your help! -brian _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx -- GnuDIP Mailing List http://gnudip2.sourceforge.net/#mailinglist