Hi Robert! Can you tech me how to disable reverse DNS for FTP server?
T.Q. Jason Lim Robert Toth wrote: > > Hiya Svavar!! > > The problem is probably related to the fact that your workstation(s) > INSIDE of your lan (on the 10.100.xx.xx network) do not have DNS entries > in your DNS server... Proof is that the reverse DNS for the external > world works great usually (unless you try a non-listed host behind a NAT > gateway, or something similar : this should also take 20 or so seconds > as well as there is no official DNS setup for this) > > Two suggestions: > 1) Enter in your complete DNS database for all your workstations and > inside hosts on your 10.100 network.. (BEST) > 2) Disable Reverse-DNS lookups on the FTP server (less convenient for > logging purposes - You'll only have IP addresses that you'll be forced > to look up by hand if you need to.. Less secure as you won't be able to > enforce Reverse DNS validation rule for logon (ie: drop any non-listed > hosts/nodes that attempt to logon - only valid Internet DNS-listed hosts > are granted access). > > So if you don't want to block anyone from your FTP server, and if you > don't really need FQDN's in the log file, simply disable the Reverse-DNS > lookups in the FTP server configuration. That will remove the delay. > > Otherwise, spend the time creating the missing internal DNS database, so > that you can keep the security rules in place... > > Hope this helps... > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] On Behalf Of Svavar Örn > Eysteinsson > Sent: October 1, 2001 8:56 AM > To: [EMAIL PROTECTED] > Subject: RE: Slow FTP Connection? > > Hi. Thanks for the reply. > I'm not very good at DNS so can you give me a hint. > I checked the reverse address for the server in 10.100. It's : > > Address : 10.100.0.5 > Hostname : x.internal.x.is > TimeToLive : default > > Best regards, > > Svavar Orn > [EMAIL PROTECTED] > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of # sriram # > Sent: 1. október 2001 12:40 > To: Red Hat 7. 1 MailingList > Subject: Re: Slow FTP Connection? > > check the reverse lookup on ur DNS for this machine > > On Mon, 1 Oct 2001, Svavar Örn Eysteinsson wrote: > > !Date: Mon, 1 Oct 2001 12:35:33 -0000 > !From: Svavar Örn Eysteinsson <[EMAIL PROTECTED]> > !Reply-To: [EMAIL PROTECTED] > !To: Red Hat 7. 1 MailingList <[EMAIL PROTECTED]> > !Subject: Slow FTP Connection? > ! > !Hello. > !I'm having a strange problem with my ftp server, not a problem maby a > bug. > !My FTP server is running the latest Kernel 2.4.10 and ProFTPD in Xinetd > !mode. > !The server has two interfaces. The Eth0 is the public(213.176.x.x) > !and Eth1 as internal(10.100.0.5). Every time a make a ftp connection to > the > !server on 10.100.0.5 or 213.176.x.x address it takes about 10-20sec to > !display > !the login window. This happens when i am at work on the internal net. > !But when i do it on some other place, for an example another company > with > !a diffrent pipe and ISP it displays the ftp login window right ahead. > ! > !Any ideas? This is very strange. > ! > !This happens when i do : "ftp 10.100.0.5" or "ftp 213.176.x.x" : > ! > !"Connected to x.x.x.x" > ! > !and it waits there for 10-20secs and finnaly it displays : > ! > !220 ProFTPD 1.2.2 Server (HOSTNAME) [hostname] > !User (x.x.x.x:(none)): > ! > !Is it maby something to do with the firewall? > ! > !Thanks for your time. > ! > !Cheers! > ! > !Best regards, > ! > !Svavar Orn > [EMAIL PROTECTED] > !Reykjavik - ICELAND > ! > ! > ! > !_______________________________________________ > !Seawolf-list mailing list > [EMAIL PROTECTED] > !https://listman.redhat.com/mailman/listinfo/seawolf-list > ! > > ---------------------------------------------------------- > When i read about the evils of smoking , I gave up reading > ---------------------------------------------------------- > > _______________________________________________ > Seawolf-list mailing list > [EMAIL PROTECTED] > https://listman.redhat.com/mailman/listinfo/seawolf-list > > _______________________________________________ > Seawolf-list mailing list > [EMAIL PROTECTED] > https://listman.redhat.com/mailman/listinfo/seawolf-list > > _______________________________________________ > Seawolf-list mailing list > [EMAIL PROTECTED] > https://listman.redhat.com/mailman/listinfo/seawolf-list _______________________________________________ Seawolf-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/seawolf-list
