Visit Our UNIX and Linux User Community


ftp delays


 
Thread Tools Search this Thread
Special Forums IP Networking ftp delays
# 1  
Old 09-26-2002
ftp delays

Hello,

I'm having a small problem. When I try to connect to a FTP server it takes about 30 seconds for me to open the FTP connection it self. I am wondering what can cause such a long delay. Most of the people tell me that the server is not able to resolve my IP to a hostname and the people recommended me setup reverse DNS. Before I do so, my question is how come I can connect to some FTP server without any problems?

Thanks a lot.
# 2  
Old 09-27-2002
Are these FTP server all public ones?

It does sound like the reverse DNS on the particyular one you are trying to connect to has problems. It could just be resolving against a poor DNS server compaired to the rest you are connecting to.

W
# 3  
Old 09-27-2002
Not all ftp servers will attempt a reverse dns lookup. I'll bet that's why you can connect quickly to some of them.
# 4  
Old 09-28-2002
Would the type of OS the user is running play any role in this?
# 5  
Old 09-28-2002
I have two questions that may provide some clues:

1. If you ping a fast server and a slow server what is the time difference?

2. If you upload and/or download a sizable files to both a fast server and slow server, what is the time difference?

It may be a combination of network performance and system performance (probably mostly the later).
# 6  
Old 10-02-2002
Windows Vs UNIX FTP

Just an observation really, I've noticed some real lag when a Windows (2000) client connects to a UNIX FTP server, but never when I go UNIX to UNIX no matter what flavour of UNIX O/S.

Maybe the lookup is happening from the Windows side and not (by default) with a UNIX FTP connection ? If I get chance I'll look into this some more as it bugs me too.

B

Previous Thread | Next Thread
Test Your Knowledge in Computers #449
Difficulty: Medium
Linux Mint was originally based on Kubuntu.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

[Tip] How to add individual delays to a cron job?

ofIn a big Unix environment you likely install cron jobs like this on a thousand systems: 39 15 * * * { /usr/local/monitoring/sendstats ; } >/dev/null 2>&1If all the system clocks are synchronized (usually via NTP), these jobs run *exactly* at the same time. If the cron job accesses a shared... (2 Replies)
Discussion started by: MadeInGermany
2 Replies

2. UNIX and Linux Applications

Sendmail external email delays and mailertables problems on Solaris

Setup is a Solaris 11 zone running sendmail as a relay to our actual mailservers. All emails to external domains seem to be being tried to be sent directly from this Solaris 11 zone which cannot send mail externally. All emails sent to our pager addresses as defined in the /etc/mail/aliases... (0 Replies)
Discussion started by: LittleLebowski
0 Replies

3. HP-UX

[Solved] Unable to rename file in ftp server .Net:FTP perl

Hello All, I am trying to connect to ftp server and get the files. Also i need to rename the file in other ftp dir. rename method is not allowing me to rename the file in other dir. When i tried copy command by using net::FTP:FILE then perl says it is not installed. Can some body help me to... (2 Replies)
Discussion started by: krsnadasa
2 Replies

4. AIX

ftp connect in passive mode , ftp settings

how to connect to ftp server in passive mode? ftp server.abc and how can i see ftp settings, doesn't exist some ftpd.conf there is some other file where i check the options and configurations of ftp server? Thanks (3 Replies)
Discussion started by: prpkrk
3 Replies

5. UNIX for Dummies Questions & Answers

How to make delays between multiple commands in an alias (ircII)?

Okay so I have an alias that looks like this: ALIAS gscn { MSG gscn Test1 MSG gscn Test2 MSG gscn Test3 MSG gscn Test4 MSG gscn Test5 } How do I make it wait 5 seconds between each command before it executes the next one after that in order from top to bottom? I tried the TIMER... (1 Reply)
Discussion started by: guitarscn
1 Replies

6. Shell Programming and Scripting

Automated FTP script using .netrc to multiple FTP servers

Hi all, I'm using the following script to automated ftp files to 1 ftp servers host=192.168.0.1 /usr/bin/ftp -vi >> $bkplog 2>&1 <<ftp open $host bin cd ${directory} put $files quit ftp and the .netrc file contain machine 192.168.0.1 login abc... (4 Replies)
Discussion started by: varu0612
4 Replies

7. Infrastructure Monitoring

expect telnet unexpected delays

I must automatically monitor and manage a large number of boxes on our network. I have been using perl/Net::Telnet and expect/telnet and also perl/ssh and expect/ssh to reach the command line of the remote boxes. Scripts are working but slow. (Yes, I do use SNMP also but many boxes do not... (2 Replies)
Discussion started by: kp2a
2 Replies

8. Shell Programming and Scripting

passing parameter to ftp script from output of another ftp

Hi, I have a ftp script which first gets all the file names and echo's the latest file. I'm using another ftp command sets to get the file name given by first ftp. The problem is the parameter is not accepted by second ftp. The error message i'm getting is > Rename Temp File calloc:ICMP... (5 Replies)
Discussion started by: ammu
5 Replies

9. UNIX for Advanced & Expert Users

Using FTP to check whether file is completely FTP... plz find the description below

Hi, We have some clients who will place huge files in to one of the remote server. And the shell script written in our local server to retrieve client files (using FTP) placed on one of the remote server of ours by clients. My question Is there any FTP command/script to check from my local... (1 Reply)
Discussion started by: nmsrao
1 Replies

10. UNIX for Advanced & Expert Users

MVS->Unix FTP : Using chmod as part of FTP.

We are transferring file from mainframes to unix, & in FTP process itself we would like to set access rights for unix machine. Has anyone used chmod command in association with site command in ftp? How it should be used? Thanks in advance. (1 Reply)
Discussion started by: videsh77
1 Replies

Featured Tech Videos