Mail through PIX?

[brea]

We recently installed a PIX501 /w 16MB of RAM. It's capable to hold 50 inside hosts.

After installing it web and all other outisde traffic except e-mail is working fine. When you connect to the mail server (through SMTP or POP3) it takes an inordinate amount of time. Anyone have any ideas why this would happen?

Here is my config.

: Saved
: Written by enable_15 at 06:12:45.778 UTC Fri Nov 22 2002
PIX Version 6.2(2)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password xxxxxxxxxxxxxxxxx encrypted
passwd xxxxxxxxxxxxxxxx encrypted
hostname pixfirewall
domain-name xxxxxxxx.com
fixup protocol ftp 21
fixup protocol http 80
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol ils 389
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol sip 5060
fixup protocol skinny 2000
names
pager lines 24
interface ethernet0 10baset
interface ethernet1 10full
icmp permit any echo-reply outside
icmp permit any echo outside
icmp permit any time-exceeded outside
icmp permit any traceroute outside
mtu outside 1500
mtu inside 1500
ip address outside 209.x.x.226 255.255.255.240
ip address inside 192.168.0.250 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm location 192.168.1.1 255.255.255.255 inside
pdm location 192.168.0.230 255.255.255.255 inside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0 dns 0 0
route outside 0.0.0.0 0.0.0.0 209.x.x.225 1
timeout xlate 0:05:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 si
p 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
http server enable
http 192.168.0.0 255.255.255.0 inside
floodguard enable
sysopt connection tcpmss 0
no sysopt route dnat
telnet 192.168.0.230 255.255.255.255 inside
telnet timeout 5
ssh timeout 5
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
terminal width 80

Thanks for your time.

 

[yizhar]

HI.

Where is the mail server (at your location or ISP)?
(I will assume it is at the ISP)
What kind of mail server is it? (UNIX-SENDMAIL,MS-EXCHANGE,MIRAPOINT)?

Ask the mail server administrator or ISP to help you with this issue.
Ask them if the mail server is using IDENT and/or is doing reverse DNS lookup.

http://www.cisco.com/warp/public/110/2.html

http://www.cisco.com/warp/public/110/21.html

Anyway ask your ISP to register your ip address in DNS including reverse lookup.

Use syslog messages, and check if you get denied hits on TCP port 113 (IDENT) from the mail server:
logging on
logging buffer 4
(Now try to access the mail server)
show log

Bye
Yizhar Hurwitz

http://come.to/yizhar

http://teachers.sivan.co.il/yizhar