Dear List,
I have just finished setting up a mailserver... or so I thought.
However I could not telnet to port 25 either locally or on any machine
in our LAN.
==================================
[EMAIL PROTECTED]:/home/mhacleth$ telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
^]
telnet>quit
==================================
SPECS:
P3 733MHz, 512MB RAM
Slackware 10, kernel-2.4.29
Postfix-2.1.4, MailScanner(ClamAV-0.81+SpamAssassin)
SquirrelMail (for webmail).
main.cf
==================================
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
myhostname = mail.pbts.net.ph
mydomain = pbts.net.ph
myorigin = $mydomain
mydestination = $myhostname, localhost.$mydomain, $mydomain
unknown_local_recipient_reject_code = 450
mynetworks_style = subnet
relay_domains = $mydestination
relayhost = $mydomain
in_flow_delay = 2s
alias_maps = hash:/etc/postfix/aliases
alias_database = hash:/etc/postfix/aliases
mailbox_command = /usr/bin/procmail
header_checks = regexp:/etc/postfix/header_checks
smtpd_banner = $myhostname ESMTP $mail_name ($mail_version) Slackware 10
local_destination_concurrency_limit = 2
default_destination_concurrency_limit = 10
debug_peer_level = 2
sendmail_path = /usr/sbin/sendmail
newaliases_path = /usr/bin/newaliases
mailq_path = /usr/bin/mailq
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/man
sample_directory = /etc/postfix
readme_directory = no
smtpd_helo_required = yes
smtpd_client_restrictions = permit_mynetworks, reject_unknown_client
disable_vrfy_command = yes
ignore_mx_lookup_error = yes
delay_warning_time = 4
recipient_delimiter = +
===================================
master.cf
===================================
smtp inet n - y - - smtpd
pickup fifo n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
qmgr fifo n - y 300 1 qmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
smtp unix - - y - - smtp
relay unix - - y - - smtp
showq unix n - y - - showq
error unix - - y - - error
local unix - n n - - local
virtual unix - n y - - virtual
lmtp unix - - y - - lmtp
anvil unix - - n - 1 anvil
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
old-cyrus unix - n n - - pipe
flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
cyrus unix - n n - - pipe
user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient
===============================
NETSTAT:
===============================
[EMAIL PROTECTED]:~$ netstat -ln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:37 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:110 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:143 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:6000 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:113 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:82 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN
udp 0 0 0.0.0.0:512 0.0.0.0:*
udp 0 0 0.0.0.0:10000 0.0.0.0:*
udp 0 0 0.0.0.0:37 0.0.0.0:*
========================================
NMAP:
========================================
[EMAIL PROTECTED]:/home/mhacleth# nmap -sT -O localhost
Starting nmap 3.50 ( http://www.insecure.org/nmap/ ) at 2005-03-03 16:44 PHT
Interesting ports on localhost (127.0.0.1):
(The 1650 ports scanned but not shown below are in state: closed)
PORT STATE SERVICE
22/tcp open ssh
25/tcp open smtp
37/tcp open time
80/tcp open http
82/tcp open xfer
110/tcp open pop3
113/tcp open auth
143/tcp open imap
6000/tcp open X11
Device type: general purpose
Running: Linux 2.4.X|2.5.X
OS details: Linux Kernel 2.4.0 - 2.5.20 w/o tcp_timestamps
Nmap run completed -- 1 IP address (1 host up) scanned in 5.378 seconds
===============================
GSHIELD:
===============================
[EMAIL PROTECTED]:/home/mhacleth# /etc/firewall/gShield.rc
[gShield] initializing v2.8
[gShield] default TCP response set to REJECT with tcp-reset
[gShield] default UDP response set to REJECT with icmp-port-unreachable
[gShield] default logging rate limit set to 20/m
[gShield] not logging ICMP
[gShield] no reserved drop logging
[gShield] dropping multicasts
[gShield] 10.42.42.0/24 authorized for NAT
[gShield] interface eth0 up
[gShield] 10.42.43.0/24 authorized for NAT
[gShield] interface eth0 up
[gShield] Custom forwards DISabled
[gShield] Allowing all ICMP at rate of 30/m
[gShield] Allowing all traceroutes
[gShield] httpd publically accessible
[gShield] httpd-ssl publically accessible
[gShield] SMTP daemon publically accessible
[gShield] POP3 daemon publically accessible
[gShield] SSH daemon publically accessible
[gShield] Opening port 82
================================
I could not pin down why this is happening. I already googled for
similar problems but most of the results that I saw can still connect
to the localhost... I can't...
Is there any setting that I missed?
Any similar problem you encountered? How did you get around that?
Sincerely,
*almost* hairless mhac
(i can't help but pull one off for every solution i tried that failed.. )
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