11-27-2012 08:11 AM - edited 03-11-2019 05:28 PM
Hi Everyone,
I'm kind of a novice when it comes to Cisco configuration. I went to college for networking but haven't used it enough since graduating and I'm having some trouble with opening some ports for email to my home PC.
Specifically i'm trying to set up IMAP with Gmail to be downloaded to my Mozilla Thunderbird client. I'm using a similar syntax for other ports that i've opened but it isn't working. I also did a "show access list" and saw that one of my rules had hit counts on it but i'm not sure what this means as far as troubleshooting goes.
Can someone lend a hand and explain what i'm doing wrong? If you're feeling extra nice could you let me know what I would need to do to open some Xbox Live ports as well? The rules aren't set up yet but the ports are present in my config. I've bolded the relevant ports below.
*** Config ****
ASA Version 8.2(5)
!
hostname RyansFirewall
enable password C5OQraC02mISnP8p encrypted
passwd 3mBdM08UO1apR0bB encrypted
names
name 192.168.1.130 theking
name 192.168.1.240 wap
name 192.168.1.252 cam
name 192.168.1.253 switch
name 192.168.1.150 xbox
name x.x.x.x vpnreactor
name x.x.x.x HSoftware
name x.x.x.x Mom_and_Dad
!
interface Ethernet0/0
description Connection_to_Cable_Modem
switchport access vlan 10
!
interface Ethernet0/1
description Cisco_Catalyst_2960
!
interface Ethernet0/2
!
interface Ethernet0/3
shutdown
!
interface Ethernet0/4
shutdown
!
interface Ethernet0/5
description Guest_Wireless
switchport access vlan 20
!
interface Ethernet0/6
shutdown
!
interface Ethernet0/7
shutdown
!
interface Vlan1
description Private_Internal_Lan
nameif inside
security-level 100
ip address 192.168.1.254 255.255.255.0
!
interface Vlan10
description WOW_Internet
nameif outside
security-level 0
ip address dhcp setroute
!
interface Vlan20
description Guest_Wireless
no forward interface Vlan1
nameif dmz
security-level 30
ip address 172.16.1.254 255.255.255.0
!
boot system disk0:/asa825-k8.bin
ftp mode passive
clock timezone Eastern -5
object-group network outside_ip_group
description This group contains a list of allowed public IP Addresses
network-object HSoftware 255.255.255.255
network-object Mom_and_Dad 255.255.255.255
object-group service Xbox_Ports tcp-udp
description Ports needed for Xbox Live
port-object eq www
port-object eq 88
port-object eq domain
port-object eq 3074
object-group service Email_Ports tcp-udp
description Ports needed for Email
port-object eq 143
port-object eq 465
port-object eq 587
port-object eq 993
access-list outside_access_in extended permit tcp object-group outside_ip_group any eq 1024
access-list outside_access_in extended permit tcp any any eq 3389
access-list outside_access_in extended permit tcp any any eq ftp
access-list outside_access_in extended permit gre host vpnreactor host theking
access-list outside_access_in extended permit tcp host vpnreactor host theking eq pptp
access-list outside_access_in extended permit icmp any any echo-reply
access-list outside_access_in extended permit icmp any any time-exceeded
access-list outside_access_in extended permit icmp any any unreachable
access-list outside_access_in extended permit tcp object-group outside_ip_group any eq 5900
access-list outside_access_in extended permit tcp any any object-group Email_Ports
access-list outside_access_in extended permit udp any any object-group Email_Ports
pager lines 24
mtu inside 1500
mtu outside 1500
mtu dmz 1500
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-635.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
nat (outside) 1 access-list outside_access_in
nat (dmz) 1 0.0.0.0 0.0.0.0
static (inside,outside) tcp interface 3389 theking 3389 netmask 255.255.255.255
static (inside,outside) tcp interface ftp theking ftp netmask 255.255.255.255
static (inside,outside) tcp interface 1024 cam 1024 netmask 255.255.255.255
static (inside,outside) tcp interface 5900 theking 5900 netmask 255.255.255.255
static (inside,outside) tcp interface 143 theking 143 netmask 255.255.255.255
static (inside,outside) tcp interface 465 theking 465 netmask 255.255.255.255
static (inside,outside) tcp interface 587 theking 587 netmask 255.255.255.255
static (inside,outside) tcp interface 993 theking 993 netmask 255.255.255.255
access-group outside_access_in in interface outside
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 192.168.1.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
telnet timeout 5
ssh 192.168.1.0 255.255.255.0 inside
ssh Mom_and_Dad 255.255.255.255 outside
ssh HSoftware 255.255.255.255 outside
ssh timeout 10
console timeout 10
dhcpd address 192.168.1.2-192.168.1.25 inside
dhcpd dns x.x.x.x x.x.x.x interface inside
dhcpd lease 10800 interface inside
dhcpd domain RyanJohn interface inside
dhcpd enable inside
!
dhcpd address 172.16.1.2-172.16.1.25 dmz
dhcpd dns 8.8.8.8 8.8.4.4 interface dmz
dhcpd domain RyanJohnGuest interface dmz
dhcpd enable dmz
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
username XXXXX password ZpRIy72StEDDpdfG encrypted
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map global_policy
class inspection_default
inspect pptp
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:3c7abf7d5d55aba0e19d5da340132000
: end
*** Show Access List ****
RyansFirewall# show access-list outside_access_in
access-list outside_access_in; 19 elements; name hash: 0x6892a938
access-list outside_access_in line 1 extended permit tcp object-group outside_ip_group any eq 1024 0xf13a69fb
access-list outside_access_in line 1 extended permit tcp host HSoftware any eq 1024 (hitcnt=0) 0xc8c42900
access-list outside_access_in line 1 extended permit tcp host Mom_and_Dad any eq 1024 (hitcnt=0) 0x7e777675
access-list outside_access_in line 2 extended permit tcp any any eq 3389 (hitcnt=7451) 0x51a647d7
access-list outside_access_in line 3 extended permit tcp any any eq ftp (hitcnt=11) 0x8d0d5aac
access-list outside_access_in line 4 extended permit gre host vpnreactor host theking (hitcnt=0) 0x894a4bbb
access-list outside_access_in line 5 extended permit tcp host vpnreactor host theking eq pptp (hitcnt=0) 0xcb0322a8
access-list outside_access_in line 6 extended permit icmp any any echo-reply (hitcnt=563) 0x54b872f3
access-list outside_access_in line 7 extended permit icmp any any time-exceeded (hitcnt=703) 0x03690eb3
access-list outside_access_in line 8 extended permit icmp any any unreachable (hitcnt=7408) 0x5c2fa603
access-list outside_access_in line 9 extended permit tcp object-group outside_ip_group any eq 5900 0xe88875b2
access-list outside_access_in line 9 extended permit tcp host HSoftware any eq 5900 (hitcnt=0) 0x2208e16f
access-list outside_access_in line 9 extended permit tcp host Mom_and_Dad any eq 5900 (hitcnt=0) 0xa3aaaedd
access-list outside_access_in line 10 extended permit tcp any any object-group Email_Ports 0x91529965
access-list outside_access_in line 10 extended permit tcp any any eq imap4 (hitcnt=17) 0x53d153bd
access-list outside_access_in line 10 extended permit tcp any any eq 465 (hitcnt=0) 0x4d992f5e
access-list outside_access_in line 10 extended permit tcp any any eq 587 (hitcnt=0) 0x734d200d
access-list outside_access_in line 10 extended permit tcp any any eq 993 (hitcnt=0) 0xb91930a9
access-list outside_access_in line 11 extended permit udp any any object-group Email_Ports 0xe12dbb9d
access-list outside_access_in line 11 extended permit udp any any eq 143 (hitcnt=0) 0x34d1c49d
access-list outside_access_in line 11 extended permit udp any any eq 465 (hitcnt=0) 0x5cc4b908
access-list outside_access_in line 11 extended permit udp any any eq 587 (hitcnt=0) 0x6e3b53a3
access-list outside_access_in line 11 extended permit udp any any eq 993 (hitcnt=0) 0x7f9dd9b7
11-27-2012 09:52 AM
Hi,
post output of following:
packet-tracer input tcp 8.8.8.8 1024 192.168.1.130 143 detailed
Regards.
Alain
Don't forget to rate helpful posts.
11-27-2012 04:23 PM
Hi, the command you posted didn't exactly work so I entered what seemed correct.
RyansFirewall(config): packet-tracer input outside tcp 8.8.8.8 465 192.168.1.130 465 detailed
Phase: 1
Type: ROUTE-LOOKUP
Subtype: input
Result: ALLOW
Config:
Additional Information:
in 192.168.1.0 255.255.255.0 inside
Phase: 2
Type: ACCESS-LIST
Subtype: log
Result: ALLOW
Config:
access-group outside_access_in in interface outside
access-list outside_access_in extended permit object-group Email_Ports any any
object-group service Email_Ports
service-object tcp-udp source eq 143
service-object tcp-udp source eq 465
service-object tcp-udp source eq 587
service-object tcp-udp source eq 993
Additional Information:
Forward Flow based lookup yields rule:
in id=0xd7e826e8, priority=12, domain=permit, deny=false
hits=1, user_data=0xd613bf50, cs_id=0x0, flags=0x0, protocol=6
src ip=0.0.0.0, mask=0.0.0.0, port=465
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Phase: 3
Type: IP-OPTIONS
Subtype:
Result: ALLOW
Config:
Additional Information:
Forward Flow based lookup yields rule:
in id=0xd7de9018, priority=0, domain=inspect-ip-options, deny=true
hits=635, user_data=0x0, cs_id=0x0, reverse, flags=0x0, protocol=0
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Phase: 4
Type: NAT
Subtype: host-limits
Result: ALLOW
Config:
nat (outside) 1 access-list outside_access_in
match tcp outside any outside any eq 3389
dynamic translation to pool 1 (Public IP Address [Interface PAT])
translate_hits = 0, untranslate_hits = 0
Additional Information:
Forward Flow based lookup yields rule:
in id=0xd7e62278, priority=2, domain=host, deny=false
hits=835, user_data=0xd7e61e60, cs_id=0x0, reverse, flags=0x0, protocol=0
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Phase: 5
Type: HOST-LIMIT
Subtype:
Result: ALLOW
Config:
Additional Information:
Forward Flow based lookup yields rule:
in id=0xd7debf90, priority=0, domain=host-limit, deny=false
hits=12, user_data=0x0, cs_id=0x0, flags=0x0, protocol=0
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Phase: 6
Type: NAT
Subtype: rpf-check
Result: DROP
Config:
static (inside,outside) tcp interface 465 theking 465 netmask 255.255.255.255
match tcp inside host theking eq 465 outside any
static translation to 0.0.0.0/465
translate_hits = 0, untranslate_hits = 2
Additional Information:
Forward Flow based lookup yields rule:
out id=0xd7e79600, priority=5, domain=nat-reverse, deny=false
hits=2, user_data=0xd7e79160, cs_id=0x0, flags=0x0, protocol=6
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=theking, mask=255.255.255.255, port=465, dscp=0x0
Result:
input-interface: outside
input-status: up
input-line-status: up
output-interface: inside
output-status: up
output-line-status: up
Action: drop
Drop-reason: (acl-drop) Flow is denied by configured rule
11-28-2012 04:25 AM
paste the output for the following :-
packet-tracer input outside tcp 8.8.8.8 465
note: outside interface ip you can get via , "sh int ip brief"
11-28-2012 07:14 AM
Hi Riyasat,
Here is the result of the command. I'm a little confused though as it said it passed through although this port is still not open to my inside host.
RyansFirewall# packet-tracer input outside tcp 8.8.8.8 465 Outside_IP 465 detailed
Phase: 1
Type: UN-NAT
Subtype: static
Result: ALLOW
Config:
static (inside,outside) tcp interface 465 theking 465 netmask 255.255.255.255
match tcp inside host theking eq 465 outside any
static translation to Outside_IP/465
translate_hits = 0, untranslate_hits = 2
Additional Information:
NAT divert to egress interface inside
Untranslate Outside_IP/465 to theking/465 using netmask 255.255.255.255
Phase: 2
Type: ACCESS-LIST
Subtype: log
Result: ALLOW
Config:
access-group outside_access_in in interface outside
access-list outside_access_in extended permit tcp any any eq 465
Additional Information:
Forward Flow based lookup yields rule:
in id=0xd863ac20, priority=12, domain=permit, deny=false
hits=9, user_data=0xd613bd70, cs_id=0x0, flags=0x0, protocol=6
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=465, dscp=0x0
Phase: 3
Type: IP-OPTIONS
Subtype:
Result: ALLOW
Config:
Additional Information:
Forward Flow based lookup yields rule:
in id=0xd7de9018, priority=0, domain=inspect-ip-options, deny=true
hits=20003, user_data=0x0, cs_id=0x0, reverse, flags=0x0, protocol=0
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Phase: 4
Type: NAT
Subtype: host-limits
Result: ALLOW
Config:
nat (outside) 1 access-list outside_access_in
match tcp outside any outside any eq 3389
dynamic translation to pool 1 (Outside_IP [Interface PAT])
translate_hits = 0, untranslate_hits = 0
Additional Information:
Forward Flow based lookup yields rule:
in id=0xd7e62278, priority=2, domain=host, deny=false
hits=25913, user_data=0xd7e61e60, cs_id=0x0, reverse, flags=0x0, protocol=0
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Phase: 5
Type: HOST-LIMIT
Subtype:
Result: ALLOW
Config:
Additional Information:
Forward Flow based lookup yields rule:
in id=0xd7debf90, priority=0, domain=host-limit, deny=false
hits=143, user_data=0x0, cs_id=0x0, flags=0x0, protocol=0
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Phase: 6
Type: NAT
Subtype: rpf-check
Result: ALLOW
Config:
static (inside,outside) tcp interface 465 theking 465 netmask 255.255.255.255
match tcp inside host theking eq 465 outside any
static translation to Outside_IP/465
translate_hits = 0, untranslate_hits = 2
Additional Information:
Forward Flow based lookup yields rule:
out id=0xd7e84380, priority=5, domain=nat-reverse, deny=false
hits=3, user_data=0xd7e58b08, cs_id=0x0, flags=0x0, protocol=6
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=theking, mask=255.255.255.255, port=465, dscp=0x0
Phase: 7
Type: NAT
Subtype: host-limits
Result: ALLOW
Config:
static (inside,outside) tcp interface 3389 theking 3389 netmask 255.255.255.255
match tcp inside host theking eq 3389 outside any
static translation to 0.0.0.0/3389
translate_hits = 0, untranslate_hits = 107
Additional Information:
Reverse Flow based lookup yields rule:
in id=0xd7e70e30, priority=5, domain=host, deny=false
hits=1642, user_data=0xd7e6c678, cs_id=0x0, reverse, flags=0x0, protocol=0
src ip=theking, mask=255.255.255.255, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Phase: 8
Type: IP-OPTIONS
Subtype:
Result: ALLOW
Config:
Additional Information:
Reverse Flow based lookup yields rule:
in id=0xd7d9e160, priority=0, domain=inspect-ip-options, deny=true
hits=30929, user_data=0x0, cs_id=0x0, reverse, flags=0x0, protocol=0
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Phase: 9
Type: FLOW-CREATION
Subtype:
Result: ALLOW
Config:
Additional Information:
New flow created with id 31012, packet dispatched to next module
Module information for forward flow ...
snp_fp_tracer_drop
snp_fp_inspect_ip_options
snp_fp_tcp_normalizer
snp_fp_translate
snp_fp_adjacency
snp_fp_fragment
snp_ifc_stat
Module information for reverse flow ...
snp_fp_tracer_drop
snp_fp_inspect_ip_options
snp_fp_translate
snp_fp_tcp_normalizer
snp_fp_adjacency
snp_fp_fragment
snp_ifc_stat
Result:
input-interface: outside
input-status: up
input-line-status: up
output-interface: inside
output-status: up
output-line-status: up
Action: allow
11-28-2012 07:32 AM
Hi,
The Packet Tracer only test the firewall portion. It shows what happens to different traffic based on what you enter after the "packet-tracer" command.
It doesnt tell anything about the actual host behind the firewall.
One phase of the test states that it matches a permit rule on your firewalls outside interface access-list and shows the access-list rule also.
- Jouni
11-28-2012 08:05 AM
This seems like a simple problem and that something is just being overlooked. I have opened other ports on this PC using the same commands. I don't see why this one is any different. For instance, I have opened RDP access to this computer using:
access-list outside_access_in extended permit tcp any any eq 3389
static (inside,outside) tcp interface 3389 theking 3389 netmask 255.255.255.255
So why doesn't the same thing work for port 465? This is my confusion / frustration.
11-28-2012 08:22 AM
Ryan,
For the email portion, you do not use port forwarding. You are trying to access Gmail and the ports required are in use at the far end, the source port that you are coming from is dynamic. If you were hosting an email sever, you would need to use port forwarding.
Issue the following command and past the output:
packet-tracer input inside tcp 192.168.1.10 65532 173.194.69.83 465
Also, do you have WOW Ultra service or just a standard cable modem?
Xbox Live will require port forwarding, but let’s work on one issue at a time here.
11-28-2012 08:53 AM
Thanks for the reply lanbrown,
I am using a regular WOW cable modem with a dynamic ip address. It makes sense what you said about the email part not needing port forwarding, however what do I need to do to get it to communicate? Here is the result of the command that you gave me:
RyansFirewall# packet-tracer input inside tcp 192.168.1.10 65532 173.194.69.83$
Phase: 1
Type: ROUTE-LOOKUP
Subtype: input
Result: ALLOW
Config:
Additional Information:
in 0.0.0.0 0.0.0.0 outside
Phase: 2
Type: IP-OPTIONS
Subtype:
Result: ALLOW
Config:
Additional Information:
Phase: 3
Type: NAT
Subtype:
Result: ALLOW
Config:
nat (inside) 1 0.0.0.0 0.0.0.0
match ip inside any outside any
dynamic translation to pool 1 (WOWPublicIP [Interface PAT])
translate_hits = 20557, untranslate_hits = 3331
Additional Information:
Dynamic translate 192.168.1.10/65532 to WOWPublicIP/38166 using netmask 255.255.255.255
Phase: 4
Type: NAT
Subtype: host-limits
Result: ALLOW
Config:
nat (inside) 1 0.0.0.0 0.0.0.0
match ip inside any inside any
dynamic translation to pool 1 (No matching global)
translate_hits = 0, untranslate_hits = 0
Additional Information:
Phase: 5
Type: HOST-LIMIT
Subtype:
Result: ALLOW
Config:
Additional Information:
Phase: 6
Type: NAT
Subtype: host-limits
Result: ALLOW
Config:
nat (outside) 1 access-list outside_access_in
match tcp outside any outside any eq 3389
dynamic translation to pool 1 (WOWPublicIP [Interface PAT])
translate_hits = 0, untranslate_hits = 0
Additional Information:
Phase: 7
Type: IP-OPTIONS
Subtype:
Result: ALLOW
Config:
Additional Information:
Phase: 8
Type: FLOW-CREATION
Subtype:
Result: ALLOW
Config:
Additional Information:
New flow created with id 33056, packet dispatched to next module
Result:
input-interface: inside
input-status: up
input-line-status: up
output-interface: outside
output-status: up
output-line-status: up
Action: allow
11-28-2012 08:55 AM
Also on a side note, I have been messing around with xbox live ports but haven't really been able to get them to work either. I am trying to remedy the fact that when I do a network test on my xbox I get a "moderate NAT" rating. We can deal with this after the email though like you said.
11-28-2012 09:38 AM
According to the output, it works. Do you have a telnet client on the PC in question? If so, open a telnet session to 173.194.69.83 but instead of port 23 used port 465. If you can create a session (it doesn’t close immediately or you don’t get a timeout) then you did connect to the Gmail server on port 465. That would tell me you have a config issue with the email client.
Do you just have the default permit for the inside access list? To see what is going on, let’s do a capture, you might need to modify to fit your setup.
cap IMAP interface inside match tcp any any eq 465
or
cap IMAP interface inside real-time match tcp any any eq 465
To see the capture do a show capture IMAP except for the bottom one, it will display the packets as they come in. If you see packets then we need to perform a similar setup but this time on the outside interface. You can also use ASDM to do the capture. I think you are going to find that the issue is with the email client. If you can access the Internet and you have the implicit permit for the inside access-list, then the firewall is going to pass the traffic.
The reason I asked about if you had the Ultra service from WOW, the firmware on the RG is horrendous and has several glaring bugs; ARP and in how the RG handles DMZ mode. Arris who produces it should leave the market if that is what they are going to produce.
11-28-2012 09:54 AM
My capture did not get anything. Also when I telnet I get a timeout. --- scratch that just got the capture to work. The result and result in the command prompt is below:
RyansFirewall# cap IMAP interface inside real-time match tcp any any eq 465
Warning: using this option with a slow console connection may
result in an excessive amount of non-displayed packets
due to performance limitations.
Use ctrl-c to terminate real-time capture
1: 12:53:27.075084 802.1Q vlan#1 P0 192.168.1.130.1192 > 173.194.69.83.465: S 3177691729:3177691729(0) win 64512
2: 12:53:30.121926 802.1Q vlan#1 P0 192.168.1.130.1192 > 173.194.69.83.465: S 3177691729:3177691729(0) win 64512
3: 12:53:36.109705 802.1Q vlan#1 P0 192.168.1.130.1192 > 173.194.69.83.465: S 3177691729:3177691729(0) win 64512
3 packets shown.
0 packets not shown due to performance limitations.
RyansFirewall#
C:\Documents and Settings\Ryan>telnet 173.194.69.83 465
Connecting To 173.194.69.83...Could not open connection to the host, on port 465
: Connect failed
Could you explain what allows an inside port to be open? I'm not well versed in NAT and I thought the static command was allowing it to be open?
11-28-2012 10:28 AM
If you needed to create a NAT for every connection, you would need one for HTTP (80) one for HTTPS (443), etc. On the inside you are masking 192.168.1.0/24 as the egress interface which in this case is the Internet interface IP. The static NAT’s you created are there to take a port on the Internet interface IP and direct it towards an internal host. So that is from outside in, inside out a dynamic NAT would be used; this is the nat (inside) 1 0.0.0.0 0.0.0.0 command you have listed. What allows the port to be opened is a combination of the ACL and the NAT rules (there are others that play a factor, like routing, etc.)
You are trying to connect to port 465 at a remote server, so a static NAT is not needed. Unless you are trying to host an email server, then a static NAT is not necessary.
The packet tracer showed the traffic was allowed but you received a timeout when using a telnet client. Did you specify to use port 465?
Any reason why you have 3389 and ftp wide open to the entire Internet? That is a standard port that gets probed.
11-28-2012 10:35 AM
Yes I did specify to use port 465. I used the command "telnet ipaddress 465". The reason that 3389 and FTP are wide open is that I travel for work and I never know what public IP I will be coming in on when I want to connect to my home PC.
11-28-2012 10:41 AM
I'm pretty much ready to give up at this point. Like you said there's no reason it shouldn't be working and yet I still can't telnet to the ports I desire. Maybe we could switch gears and figure out why my NAT is being rated moderate in xbox live? :-)
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide