On last Friday I
upgrade some packages from RedHat Network. I downloaded and installed these
packages on the firewall server by "up2date". Then I found
I could not use POP3 to download emails from this server
- it worked fine before up2date. The structure is, we use MS exchange as our
real mail server and user firewall server (Sendmail service) as a smart host for
Exchange. All new mail hitting on the firewall on port 25/110 will be
transferred to Exchange server. I did some tests.
- When I use firewall as POP3 server, I couldn't download any mail either from outside or from internal network. Error: connection refused.
- If I use Exchange box as POP3 server, it works fine. I can download mails from Windows Exchange box.
- I used telnet Exchange 110, it works too.
- On Firewall, POP3 port 110 is opened in the iptables setting. I didn't change any firewall rule in the past week.
- I replaced all the configuration files in /etc/mail/ directory with the old sendmail configuration files, no luck. --Now I put the new configuration files back.
- I restarted sendmail, iptables services, no working.
- I can send mails from outside to internal network when I set Firewall as a SMTP server.
The only thing I
have changed was update the packages which are listed below. Do you think any of
below packages may block the POP3 channel? Are there any tool I can
scan whether port 110 is opened?
Thanks,
Yujie
===================== Packages updated on Friday
==================
apache-1.3.27-1.7.2.i386.rpm
nscd-2.2.4-31.i386.rpm
apache-devel-1.3.27-1.7.2.i386.rpm nss_ldap-189-4.i386.rpm
apache-manual-1.3.27-1.7.2.i386.rpm Omni-0.5.0-4.i386.rpm
arpwatch-2.1a11-11.7.2.0.i386.rpm Omni-foomatic-0.5.0-4.i386.rpm
arts-2.2.2-3.i386.rpm openldap-2.0.27-2.7.3.i386.rpm
at-3.1.8-23.i386.rpm openldap-clients-2.0.27-2.7.3.i386.rpm
authconfig-4.1.19.2-1.i386.rpm openldap-devel-2.0.27-2.7.3.i386.rpm
balsa-1.2.3-1.i386.rpm openssh-3.1p1-6.i386.rpm
bind-9.2.1-1.7x.2.i386.rpm openssh-askpass-3.1p1-6.i386.rpm
bind-devel-9.2.1-1.7x.2.i386.rpm openssh-askpass-gnome-3.1p1-6.i386.rpm
bind-utils-9.2.1-1.7x.2.i386.rpm openssh-clients-3.1p1-6.i386.rpm
binutils-2.11.90.0.8-12.i386.rpm openssh-server-3.1p1-6.i386.rpm
cpp-2.96-112.7.2.i386.rpm openssl-0.9.6b-28.i686.rpm
cvs-1.11.1p1-8.7.i386.rpm openssl-0.9.6b-30.7.i686.rpm
cyrus-sasl-1.5.24-23.i386.rpm openssl-devel-0.9.6b-28.i386.rpm
cyrus-sasl-devel-1.5.24-23.i386.rpm openssl-devel-0.9.6b-30.7.i386.rpm
cyrus-sasl-md5-1.5.24-23.i386.rpm pam-0.75-46.7.2.i386.rpm
cyrus-sasl-plain-1.5.24-23.i386.rpm pam-devel-0.75-46.7.2.i386.rpm
dev-3.3-4.i386.rpm perl-5.6.1-26.72.3.i386.rpm
docbook-utils-0.6.9-2.1.noarch.rpm perl-CGI-2.752-26.72.3.i386.rpm
dump-0.4b25-1.72.0.i386.rpm perl-CPAN-1.59_54-26.72.3.i386.rpm
e2fsprogs-1.26-1.72.i386.rpm perl-DB_File-1.75-26.72.3.i386.rpm
e2fsprogs-devel-1.26-1.72.i386.rpm perl-NDBM_File-1.75-26.72.3.i386.rpm
eel-1.0.2-2.i386.rpm php-4.1.2-7.2.6.i386.rpm
fetchmail-5.9.0-21.7.3.i386.rpm php-imap-4.1.2-7.2.6.i386.rpm
fileutils-4.1-10.1.i386.rpm php-ldap-4.1.2-7.2.6.i386.rpm
foomatic-1.1-0.20011218.3.i386.rpm php-pgsql-4.1.2-7.2.6.i386.rpm
gaim-0.59.1-0.7.2.i386.rpm pine-4.44-1.72.2.i386.rpm
galeon-1.2.6-0.7.2.i386.rpm popt-1.6.4-7x.i386.rpm
gcc-2.96-112.7.2.i386.rpm postgresql-7.1.3-4bp.2.i386.rpm
gcc-c++-2.96-112.7.2.i386.rpm postgresql-contrib-7.1.3-4bp.2.i386.rpm
gcc-g77-2.96-112.7.2.i386.rpm postgresql-devel-7.1.3-4bp.2.i386.rpm
gcc-objc-2.96-112.7.2.i386.rpm postgresql-libs-7.1.3-4bp.2.i386.rpm
gdb-5.2-2.i386.rpm postgresql-perl-7.1.3-4bp.2.i386.rpm
gdk-pixbuf-0.14.0-0.7.2.i386.rpm postgresql-server-7.1.3-4bp.2.i386.rpm
gdk-pixbuf-devel-0.14.0-0.7.2.i386.rpm ppp-2.4.1-3.i386.rpm
gdk-pixbuf-gnome-0.14.0-0.7.2.i386.rpm printconf-0.3.61-4.1.i386.rpm
ghostscript-6.51-16.2.i386.rpm printconf-gui-0.3.61-4.1.i386.rpm
glibc-2.2.4-31.i686.rpm python-1.5.2-43.72.i386.rpm
glibc-common-2.2.4-31.i386.rpm python-devel-1.5.2-43.72.i386.rpm
glibc-devel-2.2.4-31.i386.rpm python-popt-0.8.8-7.x.2.i386.rpm
gnorpm-0.96-12.7x.i386.rpm python-xmlrpc-1.5.1-7.x.3.i386.rpm
groff-1.17.2-7.0.2.i386.rpm raidtools-0.90-24.i386.rpm
groff-perl-1.17.2-7.0.2.i386.rpm redhat-config-network-0.9.10-2.noarch.rpm
htdig-3.2.0-2.011302.i386.rpm rhn_register-2.8.27-1.7.2.i386.rpm
hwcrypto-1.0-3.i386.rpm rhn_register-gnome-2.8.27-1.7.2.i386.rpm
imlib-1.9.13-3.7.x.i386.rpm rmt-0.4b25-1.72.0.i386.rpm
imlib-cfgeditor-1.9.13-3.7.x.i386.rpm rpm-4.0.4-7x.i386.rpm
imlib-devel-1.9.13-3.7.x.i386.rpm rpm-build-4.0.4-7x.i386.rpm
initscripts-6.43-1.i386.rpm rpm-devel-4.0.4-7x.i386.rpm
kdeaddons-kicker-2.2.2-1.i386.rpm rpm-python-4.0.4-7x.i386.rpm
kdeaddons-konqueror-2.2.2-1.i386.rpm rsync-2.4.6-13.i386.rpm
kdeaddons-noatun-2.2.2-1.i386.rpm sendmail-8.11.6-23.72.i386.rpm
kdeadmin-2.2.2-3.i386.rpm sendmail-cf-8.11.6-23.72.i386.rpm
kdeartwork-2.2.2-1.i386.rpm shadow-utils-20000902-9.7.i386.rpm
kdeartwork-locolor-2.2.2-1.i386.rpm sharutils-4.2.1-8.7.x.i386.rpm
kdebase-2.2.2-1.i386.rpm squid-2.4.STABLE6-6.7.3.i386.rpm
kdebindings-2.2.2-1.i386.rpm stunnel-3.22-1.i386.rpm
kdebindings-kmozilla-2.2.2-1.i386.rpm sudo-1.6.5p2-1.7x.1.i386.rpm
kdelibs-2.2.2-3.i386.rpm tar-1.13.25-4.7.1.i386.rpm
kdelibs-devel-2.2.2-3.i386.rpm tcpdump-3.6.2-11.7.2.0.i386.rpm
kdelibs-sound-2.2.2-3.i386.rpm tkinter-1.5.2-43.72.i386.rpm
kdelibs-sound-devel-2.2.2-3.i386.rpm tmpwatch-2.8.1-1.i386.rpm
kdemultimedia-2.2.2-2.i386.rpm ttfonts-ja-1.0-7.noarch.rpm
kdenetwork-2.2.2-2.i386.rpm tux-2.2.0-1.i386.rpm
kdenetwork-ppp-2.2.2-2.i386.rpm ucd-snmp-4.2.5-7.72.0.i386.rpm
kdepim-2.2.2-3.i386.rpm ucd-snmp-utils-4.2.5-7.72.0.i386.rpm
kdesdk-2.2.2-1.i386.rpm unzip-5.50-2.i386.rpm
kdesdk-devel-2.2.2-1.i386.rpm up2date-2.8.39-1.7.2.i386.rpm
kdeutils-2.2.2-1.i386.rpm up2date-gnome-2.8.39-1.7.2.i386.rpm
kdevelop-2.0.2-2.i386.rpm usermode-1.46-1.i386.rpm
kdoc-2.2.2-1.noarch.rpm util-linux-2.11f-17.7.2.i386.rpm
krb5-devel-1.2.2-16.i386.rpm vim-common-6.1-18.7x.2.i386.rpm
krb5-libs-1.2.2-16.i386.rpm vim-minimal-6.1-18.7x.2.i386.rpm
kudzu-0.99.42.2.72-1.i386.rpm vnc-3.3.3r2-18.6.i386.rpm
kudzu-devel-0.99.42.2.72-1.i386.rpm vnc-server-3.3.3r2-18.6.i386.rpm
libpcap-0.6.2-11.7.2.0.i386.rpm webalizer-2.01_09-1.72.i386.rpm
libpng-1.0.14-0.7x.4.i386.rpm wget-1.8.2-4.72.i386.rpm
libpng-devel-1.0.14-0.7x.4.i386.rpm wu-ftpd-2.6.1-20.i386.rpm
libstdc++-2.96-112.7.2.i386.rpm xchat-1.8.9-1.72.0.i386.rpm
libstdc++-devel-2.96-112.7.2.i386.rpm Xconfigurator-4.9.39-2.i386.rpm
logwatch-2.6-1.noarch.rpm XFree86-100dpi-fonts-4.1.0-25.i386.rpm
lynx-2.8.4-18.1.i386.rpm XFree86-4.1.0-25.i386.rpm
MAKEDEV-3.3-4.i386.rpm XFree86-75dpi-fonts-4.1.0-25.i386.rpm
mm-1.1.3-11.i386.rpm XFree86-devel-4.1.0-25.i386.rpm
mm-devel-1.1.3-11.i386.rpm XFree86-ISO8859-15-100dpi-fonts-4.1.0-25.i386.rpm
mod_perl-1.26-2.i386.rpm XFree86-ISO8859-15-75dpi-fonts-4.1.0-25.i386.rpm
mod_ssl-2.8.12-2.i386.rpm XFree86-libs-4.1.0-25.i386.rpm
modutils-2.4.18-3.7x.i386.rpm XFree86-tools-4.1.0-25.i386.rpm
mozilla-1.0.1-2.7.2.i386.rpm XFree86-twm-4.1.0-25.i386.rpm
mozilla-mail-1.0.1-2.7.2.i386.rpm XFree86-xdm-4.1.0-25.i386.rpm
mozilla-nspr-1.0.1-2.7.2.i386.rpm XFree86-xfs-4.1.0-25.i386.rpm
mozilla-nss-1.0.1-2.7.2.i386.rpm xinetd-2.3.7-4.7x.i386.rpm
mozilla-psm-1.0.1-2.7.2.i386.rpm xpdf-0.92-8.i386.rpm
mutt-1.2.5.1-1.i386.rpm ypserv-2.5-2.7x.i386.rpm
nautilus-1.0.4-48.i386.rpm zlib-1.1.3-25.7.i386.rpm
nautilus-mozilla-1.0.4-48.i386.rpm zlib-devel-1.1.3-25.7.i386.rpm
nfs-utils-0.3.1-13.7.2.1.i386.rpm
apache-devel-1.3.27-1.7.2.i386.rpm nss_ldap-189-4.i386.rpm
apache-manual-1.3.27-1.7.2.i386.rpm Omni-0.5.0-4.i386.rpm
arpwatch-2.1a11-11.7.2.0.i386.rpm Omni-foomatic-0.5.0-4.i386.rpm
arts-2.2.2-3.i386.rpm openldap-2.0.27-2.7.3.i386.rpm
at-3.1.8-23.i386.rpm openldap-clients-2.0.27-2.7.3.i386.rpm
authconfig-4.1.19.2-1.i386.rpm openldap-devel-2.0.27-2.7.3.i386.rpm
balsa-1.2.3-1.i386.rpm openssh-3.1p1-6.i386.rpm
bind-9.2.1-1.7x.2.i386.rpm openssh-askpass-3.1p1-6.i386.rpm
bind-devel-9.2.1-1.7x.2.i386.rpm openssh-askpass-gnome-3.1p1-6.i386.rpm
bind-utils-9.2.1-1.7x.2.i386.rpm openssh-clients-3.1p1-6.i386.rpm
binutils-2.11.90.0.8-12.i386.rpm openssh-server-3.1p1-6.i386.rpm
cpp-2.96-112.7.2.i386.rpm openssl-0.9.6b-28.i686.rpm
cvs-1.11.1p1-8.7.i386.rpm openssl-0.9.6b-30.7.i686.rpm
cyrus-sasl-1.5.24-23.i386.rpm openssl-devel-0.9.6b-28.i386.rpm
cyrus-sasl-devel-1.5.24-23.i386.rpm openssl-devel-0.9.6b-30.7.i386.rpm
cyrus-sasl-md5-1.5.24-23.i386.rpm pam-0.75-46.7.2.i386.rpm
cyrus-sasl-plain-1.5.24-23.i386.rpm pam-devel-0.75-46.7.2.i386.rpm
dev-3.3-4.i386.rpm perl-5.6.1-26.72.3.i386.rpm
docbook-utils-0.6.9-2.1.noarch.rpm perl-CGI-2.752-26.72.3.i386.rpm
dump-0.4b25-1.72.0.i386.rpm perl-CPAN-1.59_54-26.72.3.i386.rpm
e2fsprogs-1.26-1.72.i386.rpm perl-DB_File-1.75-26.72.3.i386.rpm
e2fsprogs-devel-1.26-1.72.i386.rpm perl-NDBM_File-1.75-26.72.3.i386.rpm
eel-1.0.2-2.i386.rpm php-4.1.2-7.2.6.i386.rpm
fetchmail-5.9.0-21.7.3.i386.rpm php-imap-4.1.2-7.2.6.i386.rpm
fileutils-4.1-10.1.i386.rpm php-ldap-4.1.2-7.2.6.i386.rpm
foomatic-1.1-0.20011218.3.i386.rpm php-pgsql-4.1.2-7.2.6.i386.rpm
gaim-0.59.1-0.7.2.i386.rpm pine-4.44-1.72.2.i386.rpm
galeon-1.2.6-0.7.2.i386.rpm popt-1.6.4-7x.i386.rpm
gcc-2.96-112.7.2.i386.rpm postgresql-7.1.3-4bp.2.i386.rpm
gcc-c++-2.96-112.7.2.i386.rpm postgresql-contrib-7.1.3-4bp.2.i386.rpm
gcc-g77-2.96-112.7.2.i386.rpm postgresql-devel-7.1.3-4bp.2.i386.rpm
gcc-objc-2.96-112.7.2.i386.rpm postgresql-libs-7.1.3-4bp.2.i386.rpm
gdb-5.2-2.i386.rpm postgresql-perl-7.1.3-4bp.2.i386.rpm
gdk-pixbuf-0.14.0-0.7.2.i386.rpm postgresql-server-7.1.3-4bp.2.i386.rpm
gdk-pixbuf-devel-0.14.0-0.7.2.i386.rpm ppp-2.4.1-3.i386.rpm
gdk-pixbuf-gnome-0.14.0-0.7.2.i386.rpm printconf-0.3.61-4.1.i386.rpm
ghostscript-6.51-16.2.i386.rpm printconf-gui-0.3.61-4.1.i386.rpm
glibc-2.2.4-31.i686.rpm python-1.5.2-43.72.i386.rpm
glibc-common-2.2.4-31.i386.rpm python-devel-1.5.2-43.72.i386.rpm
glibc-devel-2.2.4-31.i386.rpm python-popt-0.8.8-7.x.2.i386.rpm
gnorpm-0.96-12.7x.i386.rpm python-xmlrpc-1.5.1-7.x.3.i386.rpm
groff-1.17.2-7.0.2.i386.rpm raidtools-0.90-24.i386.rpm
groff-perl-1.17.2-7.0.2.i386.rpm redhat-config-network-0.9.10-2.noarch.rpm
htdig-3.2.0-2.011302.i386.rpm rhn_register-2.8.27-1.7.2.i386.rpm
hwcrypto-1.0-3.i386.rpm rhn_register-gnome-2.8.27-1.7.2.i386.rpm
imlib-1.9.13-3.7.x.i386.rpm rmt-0.4b25-1.72.0.i386.rpm
imlib-cfgeditor-1.9.13-3.7.x.i386.rpm rpm-4.0.4-7x.i386.rpm
imlib-devel-1.9.13-3.7.x.i386.rpm rpm-build-4.0.4-7x.i386.rpm
initscripts-6.43-1.i386.rpm rpm-devel-4.0.4-7x.i386.rpm
kdeaddons-kicker-2.2.2-1.i386.rpm rpm-python-4.0.4-7x.i386.rpm
kdeaddons-konqueror-2.2.2-1.i386.rpm rsync-2.4.6-13.i386.rpm
kdeaddons-noatun-2.2.2-1.i386.rpm sendmail-8.11.6-23.72.i386.rpm
kdeadmin-2.2.2-3.i386.rpm sendmail-cf-8.11.6-23.72.i386.rpm
kdeartwork-2.2.2-1.i386.rpm shadow-utils-20000902-9.7.i386.rpm
kdeartwork-locolor-2.2.2-1.i386.rpm sharutils-4.2.1-8.7.x.i386.rpm
kdebase-2.2.2-1.i386.rpm squid-2.4.STABLE6-6.7.3.i386.rpm
kdebindings-2.2.2-1.i386.rpm stunnel-3.22-1.i386.rpm
kdebindings-kmozilla-2.2.2-1.i386.rpm sudo-1.6.5p2-1.7x.1.i386.rpm
kdelibs-2.2.2-3.i386.rpm tar-1.13.25-4.7.1.i386.rpm
kdelibs-devel-2.2.2-3.i386.rpm tcpdump-3.6.2-11.7.2.0.i386.rpm
kdelibs-sound-2.2.2-3.i386.rpm tkinter-1.5.2-43.72.i386.rpm
kdelibs-sound-devel-2.2.2-3.i386.rpm tmpwatch-2.8.1-1.i386.rpm
kdemultimedia-2.2.2-2.i386.rpm ttfonts-ja-1.0-7.noarch.rpm
kdenetwork-2.2.2-2.i386.rpm tux-2.2.0-1.i386.rpm
kdenetwork-ppp-2.2.2-2.i386.rpm ucd-snmp-4.2.5-7.72.0.i386.rpm
kdepim-2.2.2-3.i386.rpm ucd-snmp-utils-4.2.5-7.72.0.i386.rpm
kdesdk-2.2.2-1.i386.rpm unzip-5.50-2.i386.rpm
kdesdk-devel-2.2.2-1.i386.rpm up2date-2.8.39-1.7.2.i386.rpm
kdeutils-2.2.2-1.i386.rpm up2date-gnome-2.8.39-1.7.2.i386.rpm
kdevelop-2.0.2-2.i386.rpm usermode-1.46-1.i386.rpm
kdoc-2.2.2-1.noarch.rpm util-linux-2.11f-17.7.2.i386.rpm
krb5-devel-1.2.2-16.i386.rpm vim-common-6.1-18.7x.2.i386.rpm
krb5-libs-1.2.2-16.i386.rpm vim-minimal-6.1-18.7x.2.i386.rpm
kudzu-0.99.42.2.72-1.i386.rpm vnc-3.3.3r2-18.6.i386.rpm
kudzu-devel-0.99.42.2.72-1.i386.rpm vnc-server-3.3.3r2-18.6.i386.rpm
libpcap-0.6.2-11.7.2.0.i386.rpm webalizer-2.01_09-1.72.i386.rpm
libpng-1.0.14-0.7x.4.i386.rpm wget-1.8.2-4.72.i386.rpm
libpng-devel-1.0.14-0.7x.4.i386.rpm wu-ftpd-2.6.1-20.i386.rpm
libstdc++-2.96-112.7.2.i386.rpm xchat-1.8.9-1.72.0.i386.rpm
libstdc++-devel-2.96-112.7.2.i386.rpm Xconfigurator-4.9.39-2.i386.rpm
logwatch-2.6-1.noarch.rpm XFree86-100dpi-fonts-4.1.0-25.i386.rpm
lynx-2.8.4-18.1.i386.rpm XFree86-4.1.0-25.i386.rpm
MAKEDEV-3.3-4.i386.rpm XFree86-75dpi-fonts-4.1.0-25.i386.rpm
mm-1.1.3-11.i386.rpm XFree86-devel-4.1.0-25.i386.rpm
mm-devel-1.1.3-11.i386.rpm XFree86-ISO8859-15-100dpi-fonts-4.1.0-25.i386.rpm
mod_perl-1.26-2.i386.rpm XFree86-ISO8859-15-75dpi-fonts-4.1.0-25.i386.rpm
mod_ssl-2.8.12-2.i386.rpm XFree86-libs-4.1.0-25.i386.rpm
modutils-2.4.18-3.7x.i386.rpm XFree86-tools-4.1.0-25.i386.rpm
mozilla-1.0.1-2.7.2.i386.rpm XFree86-twm-4.1.0-25.i386.rpm
mozilla-mail-1.0.1-2.7.2.i386.rpm XFree86-xdm-4.1.0-25.i386.rpm
mozilla-nspr-1.0.1-2.7.2.i386.rpm XFree86-xfs-4.1.0-25.i386.rpm
mozilla-nss-1.0.1-2.7.2.i386.rpm xinetd-2.3.7-4.7x.i386.rpm
mozilla-psm-1.0.1-2.7.2.i386.rpm xpdf-0.92-8.i386.rpm
mutt-1.2.5.1-1.i386.rpm ypserv-2.5-2.7x.i386.rpm
nautilus-1.0.4-48.i386.rpm zlib-1.1.3-25.7.i386.rpm
nautilus-mozilla-1.0.4-48.i386.rpm zlib-devel-1.1.3-25.7.i386.rpm
nfs-utils-0.3.1-13.7.2.1.i386.rpm
