I am having trouble with users getting "Page cannot be displayed" error
messages OR their browser just hangs. Sometimes they get to the site and
sometimes not. People have had this problem using IE 7 on XP and Vista
others are using IE 6
I have searched, implemented and verified solutions that I have found for IE
problems but still having this trouble. These people are getting to my
server as evidenced below by the packets I have grabbed and I see info
messages from mod_ssl about establishing the connection. The logs below are
representative of a client with this problem (no firewall logs are
available). These users are not pressing the stop button in the browser. I
was on the phone with a person trying to connect when the log said "Hint:
Stop button pressed in browser?"
I have a bunch of info below and I think I have everything but let me know
if I missed something. Any help would be greatly appreciated, my client is
getting upset and if I don't find a solution soon I may loose this client.
Thanks in advance,
Doug
Setup
------------------------------------------------------------
X86_64 quad Xeon 3GHZ with 2GB memory and 545GB raid and Full T1
Apache/2.0.50
Linux SUSE 9.3
mod_ssl/2.0.50
OpenSSL/0.9.7d
[other modules listed at bottom]
Apache Log:
------------------------------------------------------------
[Wed Feb 06 14:01:15 2008] [info] Connection to child 1 established (server
www.myserver.com:443, client XX.XXX.XXX.X)
[Wed Feb 06 14:01:15 2008] [info] Seeding PRNG with 144 bytes of entropy
[Wed Feb 06 14:01:18 2008] [info] (104)Connection reset by peer: SSL
handshake interrupted by system [Hint: Stop button pressed in browser?!]
[Wed Feb 06 14:01:18 2008] [info] Connection to child 1 closed with abortive
shutdown(server www.myserver.com:443, client XX.XXX.XXX.X)
Packets
------------------------------------------------------------
14:01:15.094019 IP (tos 0x0, ttl 110, id 57683, offset 0, flags [DF],
length: 48) XX.XXX.XXX.X.47540 > XXX.XXX.X.XX.443: S [tcp sum ok]
4067022148:4067022148(0) win 65535 <mss 1380,nop,nop,nop,nop>
14:01:15.121979 IP (tos 0x0, ttl 110, id 57685, offset 0, flags [DF],
length: 40) XX.XXX.XXX.X.47540 > XXX.XXX.X.XX.443: . [tcp sum ok]
4067022149:4067022149(0) ack 925029440 win 65535
14:01:15.124066 IP (tos 0x0, ttl 110, id 57686, offset 0, flags [DF],
length: 118) XX.XXX.XXX.X.47540 > XXX.XXX.X.XX.443: P [tcp sum ok]
4067022149:4067022227(78) ack 925029440 win 65535
14:01:18.159625 IP (tos 0x0, ttl 110, id 22280, offset 0, flags [DF],
length: 40) XX.XXX.XXX.X.47540 > XXX.XXX.X.XX.443: R [tcp sum ok]
4067022227:4067022227(0) win 5840
IE fixes implemented
------------------------------------------------------------
SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown
downgrade-1.0 force-response-1.0
Verified by PHP SERVER vars and response header
[nokeepalive] => 1
[ssl-unclean-shutdown] => 1
[downgrade-1_0] => 1
[force-response-1_0] => 1
Server: Apache/2.0.50 (Linux/SUSE)
X-Powered-By: PHP/5.2.0
Set-Cookie: xyz=8bax863a6ff21ec1cb3b04d0e8edf412; path=/
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Cache-Control: no-cache, no-store, must-revalidate, proxy-revalidate
Pragma: no-cache
Last-Modified: Thu, 07 Feb 2008 15:36:08 GMT
Cache-Control: post-check=0, pre-check=0
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html; charset=iso-8859-1
BrowserMatch \bMSIE\s7 !no-gzip !gzip-only-text/html
Verified by inspecting response headers for CSS & JavaScript requests
IE6
Date: Thu, 07 Feb 2008 15:26:58 GMT
Server: Apache/2.0.50 (Linux/SUSE)
Last-Modified: Wed, 12 Dec 2007 20:32:18 GMT
ETag: "247d6f-b12-4411cb9be7880"
Accept-Ranges: bytes
Content-Length: 2834
Cache-Control: max-age=172801
Expires: Sat, 09 Feb 2008 15:26:59 GMT
Connection: close
Content-Type: text/css
FireFox
Date: Thu, 07 Feb 2008 14:46:05 GMT
Server: Apache/2.0.50 (Linux/SUSE)
Last-Modified: Wed, 12 Dec 2007 20:32:18 GMT
Etag: "247d6f-b12-4411cb9be7880"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Cache-Control: max-age=172801
Expires: Sat, 09 Feb 2008 14:46:06 GMT
Content-Length: 980
Content-Type: text/css
SSLSessionCache shmcb:/var/lib/apache2/ssl_scache(512000)
Verified that its working by using the command below, I do not get any cache
information on the server-status page even though I have ExtendedStatus on
openssl s_client -connect myserver.com:443 -state -reconnect
Results used same session id for each request:
New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Session-ID: A160636BAE4C52...TRUNCATED
Reused, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Session-ID: A160636BAE4C52...TRUNCATED
Reused, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Session-ID: A160636BAE4C52...TRUNCATED
Reused, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Session-ID: A160636BAE4C52...TRUNCATED
Reused, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Session-ID: A160636BAE4C52...TRUNCATED
Reused, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Session-ID: A160636BAE4C52...TRUNCATED
Server Tuning
------------------------------------------------------------
<IfModule prefork.c>
StartServers 5
MinSpareServers 5
MaxSpareServers 10
ServerLimit 150
MaxClients 150
MaxRequestsPerChild 10000
</IfModule>
<IfModule worker.c>
StartServers 2
MinSpareThreads 25
MaxSpareThreads 75
MaxClients 150
ThreadsPerChild 25
MaxRequestsPerChild 10000
</IfModule>
<IfModule leader.c>
StartServers 2
MinSpareThreads 25
MaxSpareThreads 75
MaxClients 150
ThreadsPerChild 25
MaxRequestsPerChild 10000
</IfModule>
<IfModule perchild.c>
NumServers 5
StartThreads 5
MinSpareThreads 5
MaxSpareThreads 10
MaxThreadsPerChild 20
MaxRequestsPerChild 10000
AcceptMutex fcntl
</IfModule>
<IfModule metuxmpm.c>
StartThreads 5
MinSpareThreads 5
MaxSpareThreads 10
MaxRequestsPerChild 0
Multiplexer "wwwrun" "www"
</IfModule>
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 2
BrowserMatch "Mozilla/2" nokeepalive
BrowserMatch "MSIE 4\.0b2;" nokeepalive downgrade-1.0 force-response-1.0
BrowserMatch "RealPlayer 4\.0" force-response-1.0
BrowserMatch "Java/1\.0" force-response-1.0
BrowserMatch "JDK/1\.0" force-response-1.0
BrowserMatch "Microsoft Data Access Internet Publishing Provider"
redirect-carefully
BrowserMatch "^WebDrive" redirect-carefully
BrowserMatch "^WebDAVFS/1.[012]" redirect-carefully
BrowserMatch "^gnome-vfs" redirect-carefully
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
BrowserMatch \bMSIE\s7 !no-gzip !gzip-only-text/html
SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown
downgrade-1.0 force-response-1.0
AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css
text/javascript application/x-javascript
SSL
------------------------------------------------------------
AddType application/x-x509-ca-cert .crt
AddType application/x-pkcs7-crl .crl
SSLPassPhraseDialog builtin
SSLSessionCache shmcb:/var/lib/apache2/ssl_scache(512000)
SSLSessionCacheTimeout 600
SSLMutex sem
SSLRandomSeed startup builtin
SSLRandomSeed connect builtin
SSLEngine on
SSLCipherSuite
ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL
SSLCertificateFile /etc/apache2/ssl.crt/server.crt
SSLCertificateKeyFile /etc/apache2/ssl.key/server.key
SSLCACertificatePath /etc/apache2/ssl.crt
SSLCACertificateFile /etc/apache2/ssl.crt/ComodoSecurityServicesCA.crt
SSLOptions +StrictRequire
GLobal
------------------------------------------------------------
Timeout 300
ServerSignature on
ServerAdmin doug@xxxxxxxxxx
ServerName name.server.com
UseCanonicalName off
ServerTokens OS
<IfModule mod_status.c>
ExtendedStatus on
</IfModule>
LogLevel info
CustomLog /var/log/apache2/access_log combined
Mod Security
------------------------------------------------------------
<IfModule mod_security.c>
SecFilterEngine DynamicOnly
SecFilterDefaultAction "deny,log,status:403"
SecFilterScanPOST On
SecFilterCheckURLEncoding On
SecFilterCheckUnicodeEncoding Off
SecFilterForceByteRange 1 255
SecUploadDir /tmp
SecUploadKeepFiles Off
SecAuditEngine RelevantOnly
SecAuditLogRelevantStatus ^5
SecAuditLog /var/log/apache2/mod_security_log
SecFilterDebugLevel 0
SecFilterDebugLog /var/log/apache2/mod_security_debug_log
</IfModule>
Modules
------------------------------------------------------------
access_module
actions_module
alias_module
auth_module
auth_dbm_module
autoindex_module
cgi_module
dir_module
env_module
expires_module
include_module
log_config_module
mime_module
negotiation_module
setenvif_module
ssl_module
suexec_module
userdir_module
php5_module
rewrite_module
status_module
security_module
deflate_module
auth_shadow_module
Memory info using free
------------------------------------------------------------
total used free shared buffers cached
Mem: 2055108 1524412 530696 0 69552 1087208
-/+ buffers/cache: 367652 1687456
Swap: 2096440 290524 1805916
Disk Space
------------------------------------------------------------
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 545G 385G 161G 71% /
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