Open SMTP to External Mail Server

[rockonibanez]

Hey guys, I'm having trouble opening the SMTP ports on my cisco pix 501. Could someone take a look at my config.

Thanks

: Saved
:
PIX Version 6.3(5)
interface ethernet0 100full
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password 4nf31/cfwAMGSdyp encrypted
passwd 4nf31/cfwAMGSdyp encrypted
hostname ROUTER
domain-name ROUTER.local
clock timezone PST -8
clock summer-time PDT recurring
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
name *.*.*.30 MAILSERVER
name *.*.*.10 WEBSERVER
name *.*.*.20 INTERNALSERVER
access-list inside_access_in permit ip any any
access-list outside_access_in permit icmp any any
access-list outside_access_in permit tcp host WEBSERVER interface outside eq 3306
access-list outside_access_in permit tcp host MAILSERVER interface outside eq smtp
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside dhcp setroute
ip address inside 192.168.0.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm location MAILSERVER 255.255.255.255 outside
pdm location WEBSERVER 255.255.255.255 outside
pdm location INTERNALSERVER 255.255.255.255 inside
pdm location 192.168.0.0 255.255.255.255 inside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 10 interface
nat (inside) 10 0.0.0.0 0.0.0.0 0 0
static (inside,outside) tcp interface 3306 INTERNALSERVER 3306 netmask 255.255.255.255 0 0
static (inside,outside) tcp interface smtp MAILSERVER smtp netmask 255.255.255.255 0 0
access-group outside_access_in in interface outside
access-group inside_access_in in interface inside
timeout xlate 0:05:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout sip-disconnect 0:02:00 sip-invite 0:03:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
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-ipsec
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
isakmp enable inside
isakmp peer ip WEBSERVER no-xauth no-config-mode
isakmp policy 20 authentication rsa-sig
isakmp policy 20 encryption 3des
isakmp policy 20 hash md5
isakmp policy 20 group 2
isakmp policy 20 lifetime 86400
telnet 192.168.0.94 255.255.255.255 inside
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd address 192.168.0.60-192.168.0.120 inside
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside
terminal width 80

 

[unclerico]

access-list outside_access_in permit tcp host WEBSERVER interface outside eq 3306
access-list outside_access_in permit tcp host MAILSERVER interface outside eq smtp

these are backwards and look to reference the real ip and not the mapped ip. they need to be

access-list outside_access_in permit tcp any interface outside eq 3306
access-list outside_access_in permit tcp any interface outside eq smtp

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[rockonibanez]

Thank you for the response unclerico. You can ignore the 3306 request. I got that one to work...its coming in.

But I am still having troubles with the smtp going out. I ran the command you recommended and now I have a (Null Rule) according to the Device Manager.

To give more info, we send all our emails through an external web hosting company. But when I try send email or telnet to it with port 25 I get a connection error. But I can ping the server just fine.

If you or someone else has any suggestions or comments I would love to hear them.

 

[unclerico]

My apologies, this is for smtp going outbound and not inbound??

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[rockonibanez]

Yes, I'm trying to send email like through outlook or thunderbird to our webserver that is located on a different ip address. I can't get it to go through port 25, but I can receive emails just fine through 110.

 

[unclerico]

ok, well if you are using a hosted product, then you shouldn't even need your two static statements or your inbound access-list on the outside interface

no access-group outside_access_in in interface outside
no static (inside,outside) tcp interface smtp MAILSERVER smtp netmask 255.255.255.255 0 0

try removing those and let me know

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[rockonibanez]

I removed the two lines like you suggested, but I still have the same result. I've sent emails through 465 and was successful, but for some reason 25 is still blocked. Could my ISP be blocking this port?

 

[unclerico]

yes, it could be. also try no fixup protocol smtp 25

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[rockonibanez]

Thank you for all your help unclerico. I apologize for taking your time, because the problem all along was my ISP provider was blocking the smtp port to prevent spammers. So they unblocked it for me and everything is good now.

Thanks Again!