With the last 4 bit at zero, it means that all the bits must match but the last 4 do not have to. So with your starting number of 112 you can have an additional 15 address or 112 - 127. Anything out side of that range your ISP will not send to you through their router. That is why you can ping other machines on your intrAnet but not the internet. Actually your ping most likely reached its destination, but the response was not routed back to you by your ISP. It is still a little confusing to me too. I went to our network admin who ran a program. He put in the starting range, x.x.x.112 and the subnet. It then gave him the valid IP range. Your confusion has help me to learn. I love this list. Christopher K. Bipes Mailto:firstname.lastname@example.org -----Original Message----- From: Jim Langston [mailto:email@example.com] Sent: Thursday, October 07, 1999 4:13 PM To: MIDRANGE-L@midrange.com Subject: Re: Confusion reigns supreme (TCP/IP) Hmm... I verified the default route and it was correct, and it still wouldn't work. I was assigning my AS/400 a high IP address, x.x.x.139 and it wouldn't work We just got a new internet line and I had tried the same thing on my old line, with a high internet address, and it didn't work. So, I just removed the x.x.x.139 address, and added x.x.x.115, added the default route and... it worked?!? I am told that my ip range is x.x.x.112 Block Size: /28 So, I have 112-140. My net mask is 255.255.255.240 This is what confuses me, and maybe it has something to do with it? 240 in binary is 11110000 255 in binary is 11111111 wouldn't a mask of 255.255.255.240 mask off all bits but the last 4? so wouldn't my range be from 0 to 15 with 0 and 15 being unusable? Or is there something I don't understand about net masks? (I wouldn't doubt that). Anyway, thanks for the help, but there is something funny going on, I think, with the AS/400 (or V3R7M0 in particular), IP address, netmasks and the internet. Regards, A still confused Jim Langston +--- | This is the Midrange System Mailing List! | To submit a new message, send your mail to MIDRANGE-L@midrange.com. | To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com. | To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com. | Questions should be directed to the list owner/operator: firstname.lastname@example.org +--- +--- | This is the Midrange System Mailing List! | To submit a new message, send your mail to MIDRANGE-L@midrange.com. | To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com. | To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com. | Questions should be directed to the list owner/operator: email@example.com +---
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