On Fri, 28 Nov 1997, Nathan E Norman wrote:
> On Fri, 28 Nov 1997, Paul Tanner wrote: > > : Since my ISP upgraded to x2 56K I have been unable to ftp several sites > : (including ftp.debian.org) However I can ftp , for example, > prep.ai.mit.edu . > : > : The ISP's old 33.6 system is available, as before, using the old phone > : number. (x2 was installed on a new phone number) After a failed attempt at > : ftp, I can log out of my 52k connection, then log on using the old phone > : number, and ftp the same site and, only a couple minutes later ---it works! > : (but at 31.2 or slower) I have repeated this enough times to be convinced it > : is not a random failure. > > If I were a betting man, I'd guess that the problem lies in this > paragraph ... modems have IP addresses, so new modems are going to be > assigned new IP addresses. Many FTP sites try to resolve the IP address > they find within an incoming packet back to a name, for some added sense > of security. ftp.debian.org is a site that does this. If you do not > have a PTR record defined, you won't be able to ftp!! Likely as not, > your provider has not gotten around to reverse name-serving their new > modem pool, so many FTP sites are convinced you're a charlatan. > > You can test this if you know what your IP address is - simply do an > nslookup on the IP address. You'll find out soon enough if it's reverse > name-served or not. > > If the new modems aren't reverse name-served, feel free to complain to > your provider. :) > This address didn't work: ~$nslookup > 206.221.238.117 Name: ts4-117.keynet.net Address: 206.221.238.117 About 5 minutes later on the 33.6 line, this one did: ~$nslookup > 206.221.238.182 Name: ts1-182.keynet.net Address: 206.221.238.182 Thanks for the reply Paul Tanner -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
