06-01-2003 03:19 AM - edited 02-20-2020 10:46 PM
We have a MS Small Business Server as a Domain Controller running DNS Active Directory and Exchange and an W2K Server running applications. Both have static ips 192.168.0.3 and 192.168.0.2 respectively. VPN is working fine also!
The PIX is dishing out IP's to the client machines.
We have internet connectivity throughout but cannot seem get any ingoing mail through the PIX. We can see that the PIX is dropping all ingoing mail.
I have attached the firewall configuration in the hope someone may identify some problem with the rules we have set?
Building configuration...
: Saved
:
PIX Version 6.2(2)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password xxxxxx encrypted
passwd xxxxxx encrypted
hostname pixfirewall
domain-name prokinetics.com.au
clock timezone EST 10
clock summer-time EDT recurring last Sun Oct 2:00 last Sun Mar 3:00
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
name 192.168.0.3 mailgateway
name 192.168.0.2 SERVER
access-list inside_outbound_nat0_acl permit ip any 192.168.0.0 255.255.255.128
access-list outside_access_in permit udp any eq nameserver any
access-list outside_access_in permit tcp any eq pop3 host 150.101.214.18 eq pop3
access-list outside_access_in permit tcp any eq smtp host 150.101.214.18 eq smtp
access-list outside_access_in permit tcp any eq pcanywhere-data host 150.101.214
.18
access-list outside_access_in permit tcp any eq pcanywhere-data host 150.101.214
.18 eq pcanywhere-data
access-list outside_access_in permit udp any eq pcanywhere-status host 150.101.2
14.18 eq pcanywhere-status
access-list outside_access_in permit icmp any any unreachable
access-list outside_access_in permit icmp any any time-exceeded
access-list outside_access_in permit icmp any any echo-reply
access-list inside_access_in permit ip any any
access-list inside_access_in permit udp any any
access-list inside_access_in permit icmp any any
access-list inside_access_in permit tcp any any
pager lines 24
logging on
interface ethernet0 10baset
interface ethernet1 10full
icmp permit any mobile-redirect outside
icmp permit any traceroute inside
mtu outside 1500
mtu inside 1500
ip address outside 150.101.214.18 255.255.255.248
ip address inside 192.168.0.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
ip local pool VPNClients 192.168.0.50-192.168.0.70
pdm location 192.168.0.0 255.255.255.128 outside
pdm location mailgateway 255.255.255.255 inside
pdm location SERVER 255.255.255.255 inside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_outbound_nat0_acl
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
static (inside,outside) tcp interface smtp mailgateway smtp netmask 255.255.255.
255 0 0
static (inside,outside) tcp interface pop3 mailgateway pop3 netmask 255.255.255.
255 0 0
static (inside,outside) tcp interface pcanywhere-data SERVER pcanywhere-data net
mask 255.255.255.255 0 0
static (inside,outside) udp interface pcanywhere-status SERVER pcanywhere-status
netmask 255.255.255.255 0 0
access-group outside_access_in in interface outside
access-group inside_access_in in interface inside
route outside 0.0.0.0 0.0.0.0 150.101.214.17 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
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-pptp
no sysopt route dnat
telnet timeout 5
ssh timeout 5
vpdn group PPTP-VPDN-GROUP accept dialin pptp
vpdn group PPTP-VPDN-GROUP ppp authentication mschap
vpdn group PPTP-VPDN-GROUP ppp encryption mppe auto
vpdn group PPTP-VPDN-GROUP client configuration address local VPNClients
vpdn group PPTP-VPDN-GROUP client configuration dns mailgateway SERVER
vpdn group PPTP-VPDN-GROUP pptp echo 60
vpdn group PPTP-VPDN-GROUP client authentication local
vpdn username jgroves password *********
vpdn enable outside
dhcpd address 192.168.0.4-192.168.0.35 inside
dhcpd dns mailgateway 192.231.203.3
dhcpd lease 691200
dhcpd ping_timeout 750
dhcpd enable inside
terminal width 80
Cryptochecksum:xxxxxx
: end
Thanks in advance..............
06-01-2003 04:45 AM
Hi - Jason,
Try placing this cmd on your pix -
> no fixup protocol smtp 25
Hope this helps - let us know how you get on.
06-01-2003 05:05 AM
I was just able to send the postmaster@prokinetics.com.au a test message by telnet. x.x.x.18 is open for smtp, and his MX records are correct. Was no fixup the fix? I know with E5.5, having it enabled meant repeated reception of the same message from certain smtp servers, but I don't think it ever stopped us from getting any mail
06-01-2003 12:37 PM
I have the old router device installed while I try to fix. I will be trying to fix again tonite. Client needed to operate business today and is heavily dependant on email. Thanks for your help!
06-01-2003 08:06 AM
Hi Jason again -
I hope that 'no fixup worked for port smtp 25' - I thought that if security is a concern for you, you shoud try placing ' icmp deny any outside' in this way any one trying to comprimise your pix then they will be denied i.e. goto http://www.grc.com and try 'shields Up' (which is secure and free) and see if any ports are open for abuse from the outside world. - this is just a thought.
Hope it worked... let us know how you got on...
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