[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [partly OT]: in-between ISPs



On Mon, Aug 06, 2001, Oleg Goldshmidt wrote about "[partly OT]: in-between ISPs":
> I want to fetch my mail from Netvision while at the office, connected
> to Barak via ADSL. I have a RH7.1 computer, normally running
> fetchmail-5.7.4-4. I also tried downgrading to fetchmail-5.5.0 (from
> RH7.0), and - G-d forbid, Outlook on Windows 2k.
> 
> Regardless of the POP3 client, the result - not always but most of the
> time - is that I get authenticated (also confirmed by telnetting to
> port 110 of the Netvision server), get the STAT and the LIST of
> messages sitting on the server, and then get stuck on the first
> retrieval util the connection times out. A typical fetchmail -v -v
> log is attached below.
> 
> >From time to time it works, as I said, but most of the time I get

Could it be ADSL problems? For example, if your MTU is too high small
packets (like the authentication packets) will pass properly, but once
you try to send large packets (such as segments from the bulk of a message)
it may get stuck somewhere in ADSL limbo. Try setting your MTU (with ifconfig
on your RH7.1 computer) to something lower - say, try 1000. If it still
doesn't work, it's not MTU trouble.

Did you ever notice other types of network connections broken by your setup?
Say, bulk downloads using FTP, or HTTP?

Another guess: does your office have some sort of firewall, perhaps blocking
somehow parts of the POP3 port, or some important types of ICMP messages?

-- 
Nadav Har'El                        |          Monday, Aug  6 2001, 17 Av 5761
nyh@math.technion.ac.il             |-----------------------------------------
Phone: +972-53-245868, ICQ 13349191 |Tact: The ability to describe others as
http://nadav.harel.org.il           |they see themselves. - Abraham Lincoln

=================================================================
To unsubscribe, send mail to linux-il-request@linux.org.il with
the word "unsubscribe" in the message body, e.g., run the command
echo unsubscribe | mail linux-il-request@linux.org.il