No website access for Linux browsers?

No website access for Linux browsers?

Post by Roland Weed » Wed, 16 Jan 2002 21:20:50



Hi all!

On my computer I have both Linux (SuSE 7.3) and Windows 98. I connect to
the internet with DSL using smpppd for Linux and EnterNet for Windows.
I never had any major problems in browsing the Web with Linux. But since
the beginning of this year I have a strange problem with the website of
my bank (www.advance-bank.de). I cannot connect to it with ANY browser
in Linux, neither Lynx nor Netscape 4.7, Mozilla, Opera and StarOffice.
After the message "HTTP request sent, waiting for response..." nothing
happens.

Using windows, Netscape and Internet Explorer can access the site
without any problems.

What could be the technical reason for this? Is there any difference
between an HTTP request sent by a Linux browser and a request sent by a
Windows browser? I also tried different browser identifications with
Opera, but that did not help either.

Any ideas? (Needless to say, the friendly guy at the bank's hotline did
not have any...)

cu,
Roland

 
 
 

No website access for Linux browsers?

Post by Mogens Kjae » Wed, 16 Jan 2002 21:31:58


...

Quote:> But since
> the beginning of this year I have a strange problem with the website of
> my bank (www.advance-bank.de).

I don't have any problems with this site (I've only tried the front
page)
from netscape 4.78 running in RedHat 7.2.

Mogens
--
Mogens Kjaer, Carlsberg Laboratory, Dept. of Chemistry
Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark
Phone: +45 33 27 53 25, Fax: +45 33 27 47 08


 
 
 

No website access for Linux browsers?

Post by Clifford Kit » Wed, 16 Jan 2002 22:28:56



> On my computer I have both Linux (SuSE 7.3) and Windows 98. I connect to
> the internet with DSL using smpppd for Linux and EnterNet for Windows.
> I never had any major problems in browsing the Web with Linux. But since
> the beginning of this year I have a strange problem with the website of
> my bank (www.advance-bank.de). I cannot connect to it with ANY browser
> in Linux, neither Lynx nor Netscape 4.7, Mozilla, Opera and StarOffice.
> After the message "HTTP request sent, waiting for response..." nothing
> happens.

Try

 echo 0 > /proc/sys/net/ipv4/ecn


/* All the world's a net!  And all the data in it merely packets
   come to store-and-forward in the queues a while and then are
   heard no more.  'Tis a network waiting to be switched!
           -Vint Cerf, RFC 1121 */

 
 
 

No website access for Linux browsers?

Post by Roland Weed » Thu, 17 Jan 2002 01:46:15



> Try

>  echo 0 > /proc/sys/net/ipv4/ecn

Hmm... I just tried it, but I just get an error message:

bash: /proc/sys/net/ipv4/ecn: File or directory not found.

Don't know if this is important, but /proc/sys/net/ipv4 looks like this:

conf                               ip_default_ttl         tcp_dsack             tcp_retries1
icmp_echo_ignore_all               ip_dynaddr             tcp_ecn               tcp_retries2
icmp_echo_ignore_broadcasts        ip_forward             tcp_fack              tcp_rfc1337
icmp_ignore_bogus_error_responses  ip_local_port_range    tcp_fin_timeout       tcp_rmem
icmp_ratelimit                     ip_no_pmtu_disc        tcp_keepalive_intvl   tcp_sack
icmp_ratemask                      ip_nonlocal_bind       tcp_keepalive_probes  tcp_stdurg
igmp_max_memberships               ipfrag_high_thresh     tcp_keepalive_time    tcp_syn_retries
inet_peer_gc_maxtime               ipfrag_low_thresh      tcp_max_orphans       tcp_synack_retries
inet_peer_gc_mintime               ipfrag_time            tcp_max_syn_backlog   tcp_syncookies
inet_peer_maxttl                   neigh                  tcp_max_tw_buckets    tcp_timestamps
inet_peer_minttl                   route                  tcp_mem               tcp_tw_recycle
inet_peer_threshold                tcp_abort_on_overflow  tcp_orphan_retries    tcp_window_scaling
ip_autoconfig                      tcp_adv_win_scale      tcp_reordering        tcp_wmem
ip_conntrack_max                   tcp_app_win            tcp_retrans_collapse

Roland

 
 
 

No website access for Linux browsers?

Post by Ralf Bade » Thu, 17 Jan 2002 02:24:42




> ...
>> But since
>> the beginning of this year I have a strange problem with the website of
>> my bank (www.advance-bank.de).

> I don't have any problems with this site (I've only tried the front
> page)
> from netscape 4.78 running in RedHat 7.2.

> Mogens

suse73, kernel-pppoe, mozilla loads the page.
Perhaps the mtu/mru<=1492 issue?
Is there any incoming traffic (tcpdump)
 
 
 

No website access for Linux browsers?

Post by Clifford Kit » Thu, 17 Jan 2002 05:01:22




>> Try

>>  echo 0 > /proc/sys/net/ipv4/ecn
> Hmm... I just tried it, but I just get an error message:
> bash: /proc/sys/net/ipv4/ecn: File or directory not found.

Ok then try "echo 0 > /proc/sys/net/ipv4/tcp_ecn" (I don't enable ECN
so I could have had that wrong).  If that doesn't work then ECN isn't
the problem.

Try reducing the MRU of whatever interface that sends out Internet traffic
to 576 (old standard before PMTU Discovery).  Or if your DSL uses PPPoE
then 1492 as suggested by another poster.

Quote:> Don't know if this is important, but /proc/sys/net/ipv4 looks like this:
> conf                   ip_default_ttl     tcp_dsack     tcp_retries1
> icmp_echo_ignore_all   ip_dynaddr         tcp_ecn       tcp_retries2


/* All the world's a net!  And all the data in it merely packets
   come to store-and-forward in the queues a while and then are
   heard no more.  'Tis a network waiting to be switched!
           -Vint Cerf, RFC 1121 */
 
 
 

No website access for Linux browsers?

Post by Roland Weed » Thu, 17 Jan 2002 05:57:18


Hi again...

Ok, I just wanted to let you know that I just discovered the solution.
It WAS the MTU-problem. I just set the MTU for ppp0 to 1460 and suddenly
everything works fine.

Cheers,

Roland

 
 
 

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Lets make an effort to keep the internet standard and accessible to all
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I use RH 5, w/Netscape 4.05, and love it.

I am using AOL to send this because my company does not have a Usenet feed. . .

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-----------------------------------------------------------------
Peter Olson

http://members.aol.com/~polson1031

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