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From: AJ Schroeder on 19 Apr 2008 18:12
Hello group,

I have a Cisco 871 router that I am attempted to use replace my aging
Netgear router. Things are working, er, just ok.

I utilize hotmail, my fiance uses live messenger, and I have an Xbox360.
Whenever I put the 871 in as my router I can no longer sign into
hotmail, live messenger, or Xbox live!

Web browsing, google talk, FTP, and other internet traffic work fine. I
just am not able to get the Microsoft apps to work. They all time-out
for some reason. If I put the old Netgear in, everything works normally.

I thought it was something that I did, so I did a 'write erase' and then
tried to config it again.

I am running 12.4(15)T4 as that is the latest IOS out there on Cisco's
website.

Xbox Live does recommend doing port-forwarding for online gaming, so
that is needed as well as a couple of other ports for a internal server
on my network. I am not a NAT expert by any means, so I am assuming that
I have something configured wrong.

Any help on this frustrating issue would be greatly appreciated.

Here is my config on the 871 (without the crypto statements):

version 12.4
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
!
hostname BTLR-TWT-GW1
!
boot-start-marker
boot system flash:c870-advipservicesk9-mz.124-15.T4.bin
boot-end-marker
!
logging buffered 16384
!
no aaa new-model
!
ip cef
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.0.1 192.168.0.192
!
ip dhcp pool Workstations
import all
network 192.168.0.0 255.255.255.0
default-router 192.168.0.1
dns-server 192.168.0.101
lease 3
!
ip dhcp pool Xbox360
host 192.168.0.250 255.255.255.0
client-identifier 0100.125a.f415.51
!
!
no ip bootp server
ip port-map user-xbl-ctrl-udp port udp 3074 description XBOX Live
control protoc
ol over UDP
ip port-map user-xbl-ctrl-tcp port tcp 3074 description XBOX Live
control protoc
ol over TCP
ip port-map user-xbl-auth port udp 88 description XBOX Live
Authentication
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
ip ddns update method DynDNS
HTTP
add http://ajschroeder:<not shown>@members.dyndns.org/nic/update?
system=dyndns&hos
tname=<h>&myip=<a>
remove http://ajschroeder:<not shown>@members.dyndns.org/nic/update?
system=dyndns&
hostname=<h>&myip=<a>
interval maximum 0 12 0 0
!
!
multilink bundle-name authenticated
!
!
username admin privilege 15 secret 5 <not shown>
!
!
archive
log config
hidekeys
!
!
ip ssh time-out 30
!
!
!
interface FastEthernet0
switchport access vlan 2
!
interface FastEthernet1
switchport access vlan 2
!
interface FastEthernet2
switchport access vlan 2
!
interface FastEthernet3
switchport access vlan 2
!
interface FastEthernet4
ip dhcp client update dns server none
ip ddns update hostname <not shown>
ip ddns update DynDNS
ip address dhcp client-id FastEthernet4
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface Vlan1
no ip address
shutdown
!
interface Vlan2
description Local LAN
ip address 192.168.0.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 FastEthernet4 permanent
!
!
no ip http server
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
ip nat inside source list 10 interface FastEthernet4 overload
ip nat inside source static tcp 192.168.0.103 80 interface FastEthernet4
80
ip nat inside source static tcp 192.168.0.102 22 interface FastEthernet4
22
ip nat inside source static tcp 192.168.0.102 21 interface FastEthernet4
21
ip nat inside source static tcp 192.168.0.250 3074 interface
FastEthernet4 3074
ip nat inside source static udp 192.168.0.250 88 interface FastEthernet4
88
ip nat inside source static udp 192.168.0.250 3074 interface
FastEthernet4 3074
!
access-list 1 permit 10.0.0.0 0.255.255.255
access-list 1 permit 172.16.0.0 0.15.255.255
access-list 1 permit 192.168.0.0 0.0.255.255
access-list 10 remark NAT-Inside-to-Outside
access-list 10 deny 192.168.0.102
access-list 10 deny 192.168.0.103
access-list 10 deny 192.168.0.250
access-list 10 permit 192.168.0.0 0.0.255.255
no cdp run
!
!
!
!
control-plane
!
!
line con 0
logging synchronous
login local
no modem enable
line aux 0
line vty 0 4
access-class 1 in
exec-timeout 0 0
privilege level 15
logging synchronous
login local
transport input telnet ssh
!
scheduler max-task-time 5000
ntp clock-period 17178097
ntp server 192.168.0.102 prefer
end


Thanks,

AJ Schroeder
From: Doug McIntyre on 20 Apr 2008 02:18
AJ Schroeder <ajschroeder(a)no-spamhotmail.com> writes:
>I have a Cisco 871 router that I am attempted to use replace my aging
>Netgear router. Things are working, er, just ok.

>I utilize hotmail, my fiance uses live messenger, and I have an Xbox360.
>Whenever I put the 871 in as my router I can no longer sign into
>hotmail, live messenger, or Xbox live!

>Web browsing, google talk, FTP, and other internet traffic work fine. I
>just am not able to get the Microsoft apps to work. They all time-out
>for some reason. If I put the old Netgear in, everything works normally.

>I thought it was something that I did, so I did a 'write erase' and then
>tried to config it again.

No, not really anything you did.

The Netgear supports UPnP, which is basicly a method for any program
on any computers on the inside to open up holes on the
firewall. Microsoft whole-heartedly supports UPnP.

Some companies are fundementally opposed to letting client machines
open up holes willy-nilly with zero admin control over it. Cisco is
one of them, and they will never support UPnP.

Their philosophy is that if you want to open up holes, you need to
specificly open up the holes you need to match the protocols you want
going through. Thus you know what is open rather than random stuff
opening up and going through.

I'm afraid, you'll have to learn to find out what you need open, and
to open up and do port forwarding for each of the protocols you want
to use.

From: Bod43 on 20 Apr 2008 07:58
On 20 Apr, 08:18, Doug McIntyre <mer...(a)geeks.org> wrote:
> AJ Schroeder <ajschroe...(a)no-spamhotmail.com> writes:
> >I have a Cisco 871 router that I am attempted to use replace my aging
> >Netgear router. Things are working, er, just ok.
> >I utilize hotmail, my fiance uses live messenger, and I have an Xbox360.
> >Whenever I put the 871 in as my router I can no longer sign into
> >hotmail, live messenger, or Xbox live!
> >Web browsing, google talk, FTP, and other internet traffic work fine. I
> >just am not able to get the Microsoft apps to work. They all time-out
> >for some reason. If I put the old Netgear in, everything works normally.
> >I thought it was something that I did, so I did a 'write erase' and then
> >tried to config it again.
>
> No, not really anything you did.
>
> The Netgear supports UPnP, which is basicly a method for any program
> on any computers on the inside to open up holes on the
> firewall. Microsoft whole-heartedly supports UPnP.
>
> Some companies are fundementally opposed to letting client machines
> open up holes willy-nilly with zero admin control over it. Cisco is
> one of them, and they will never support UPnP.
>
> Their philosophy is that if you want to open up holes, you need to
> specificly open up the holes you need to match the protocols you want
> going through. Thus you know what is open rather than random stuff
> opening up and going through.
>
> I'm afraid, you'll have to learn to find out what you need open, and
> to open up and do port forwarding for each of the protocols you want
> to use.


In summary:-

Can't see anything amiss - unless you want to do general internet
access from ...102, 103, 250.

Details follow.


Trimming the config to the essentials that affect
NAT connectivity: (thank you for posting all of it
by the way:)

hostname BTLR-TWT-GW1
!
! The "ip port-map"s are not being referenced anywhere

!
interface FastEthernet0 ! 0...3 all Vl 2
switchport access vlan 2
!

!
interface FastEthernet4
ip address dhcp client-id FastEthernet4
ip nat outside
!

!
interface Vlan2
description Local LAN
ip address 192.168.0.1 255.255.255.0
ip nat inside
!

ip nat inside source list 10 interface FastEthernet4 overload

ip nat inside source static tcp 192.168.0.103 80 interface
FastEthernet4 80
ip nat inside source static tcp 192.168.0.102 22 interface
FastEthernet4 22
ip nat inside source static tcp 192.168.0.102 21 interface
FastEthernet4 21
ip nat inside source static tcp 192.168.0.250 3074 interface
FastEthernet4 3074
ip nat inside source static udp 192.168.0.250 88 interface
FastEthernet4 88
ip nat inside source static udp 192.168.0.250 3074 interface
FastEthernet4 3074
!
access-list 1 permit 10.0.0.0 0.255.255.255
access-list 1 permit 172.16.0.0 0.15.255.255
access-list 1 permit 192.168.0.0 0.0.255.255

access-list 10 remark NAT-Inside-to-Outside
access-list 10 deny 192.168.0.102
access-list 10 deny 192.168.0.103
access-list 10 deny 192.168.0.250
access-list 10 permit 192.168.0.0 0.0.255.255

This configuration has the following behaviour:

For hosts 102, 103, 250 do NOT do any Port Address Translation.

Allows arbitrary internet access from inside to outside
with no restrictions - using NAT.

Publishes the following to the internet
utilising the Outside address of FastEthernet 4
tcp 192.168.0.103 80
tcp 192.168.0.102 22
tcp 192.168.0.102 21 ! I am not certain, however I think that
! 21 will allow ftp since Cisco has an
! ftp Application layer Gateway which is
enabled by default
tcp 192.168.0.250 3074


udp 192.168.0.250 88
udp 192.168.0.250 3074



I do not know anything about XBox however I am certain that
hotmail is a straightforward web program that
only needs port 80 outbound (maybe 443 too?)
and makes NO inbound connections. Microsoft messenger
is surely the same and required NO inbound connections.

EXCEPT for hosts 102, 103, 250 Hotmail and MSN Messenger
should be OK.

The only other thing that I can think of is that your
provider uses a lower MTU than Ethernet default of 1500.

You could try

int vl 2
ip tcp mss-adjust 1300


Clearly 1300 will be more than low enough
but there is no point is worrying about a
few bytes here and there in my opinion,
choose one that we are certain will be low enough.

By the way you do not have the firewall enabled.
This may or may not be important to you since
one seems to get decent protection from most things
with NAT alone.

Once you get what you need working come back for
turning things off if reqired.

Maybe you mean for ACL 10 this instead:-
Note Extended ACL used instead of
Standard one, ACL number range 100-199.


access-list 110 remark Extended acl NAT-Inside-to-Outside
access-list 110 deny tcp host 192.168.0.102 eq 21 any
" " 22
access-list 110 deny tcp host 192.168.0.103 eq 80 any

etc...

access-list 110 permit 192.168.0.0 0.0.255.255 any


From: Doug McIntyre on 21 Apr 2008 02:10
AJ Schroeder <ajschroeder(a)no-spamhotmail.com> writes:
>Are there any access lists on the router that I can create to log what
>IP and port things are talking on? I know 'deny ip any any log'
>generates a lot of logs, but that doesn't tell me source and destination
>port numbers. Or am I going to have to use wireshark or something along
>those lines?

That is perhaps the best ways for discovering it yourself.

But your best resource is to just google on the program and NAT router
or some other term. There's been many people that have already figured out
what ports a protocol uses and have documented it already for devices
that aren't UPnP so they can put in NAT port forwarding to make it work.

Plenty of pages out there for any concievable thing you want to use.

From: Schroeder, AJ on 21 Apr 2008 12:45
Bod43(a)hotmail.co.uk wrote:
> On 20 Apr, 08:18, Doug McIntyre <mer...(a)geeks.org> wrote:
>> AJ Schroeder <ajschroe...(a)no-spamhotmail.com> writes:
>>> I have a Cisco 871 router that I am attempted to use replace my
>>> aging Netgear router. Things are working, er, just ok.
>>> I utilize hotmail, my fiance uses live messenger, and I have an
>>> Xbox360. Whenever I put the 871 in as my router I can no longer
>>> sign into hotmail, live messenger, or Xbox live!
>>> Web browsing, google talk, FTP, and other internet traffic work
>>> fine. I just am not able to get the Microsoft apps to work. They
>>> all time-out for some reason. If I put the old Netgear in,
>>> everything works normally. I thought it was something that I did,
>>> so I did a 'write erase' and then tried to config it again.
>>
>> No, not really anything you did.
>>
>> The Netgear supports UPnP, which is basicly a method for any program
>> on any computers on the inside to open up holes on the
>> firewall. Microsoft whole-heartedly supports UPnP.
>>
>> Some companies are fundementally opposed to letting client machines
>> open up holes willy-nilly with zero admin control over it. Cisco is
>> one of them, and they will never support UPnP.
>>
>> Their philosophy is that if you want to open up holes, you need to
>> specificly open up the holes you need to match the protocols you want
>> going through. Thus you know what is open rather than random stuff
>> opening up and going through.
>>
>> I'm afraid, you'll have to learn to find out what you need open, and
>> to open up and do port forwarding for each of the protocols you want
>> to use.
>
>
> In summary:-
>
> Can't see anything amiss - unless you want to do general internet
> access from ...102, 103, 250.
>
> Details follow.
>
>
> Trimming the config to the essentials that affect
> NAT connectivity: (thank you for posting all of it
> by the way:)
>
> hostname BTLR-TWT-GW1
> !
> ! The "ip port-map"s are not being referenced anywhere
>
> !
> interface FastEthernet0 ! 0...3 all Vl 2
> switchport access vlan 2
> !
>
> !
> interface FastEthernet4
> ip address dhcp client-id FastEthernet4
> ip nat outside
> !
>
> !
> interface Vlan2
> description Local LAN
> ip address 192.168.0.1 255.255.255.0
> ip nat inside
> !
>
> ip nat inside source list 10 interface FastEthernet4 overload
>
> ip nat inside source static tcp 192.168.0.103 80 interface
> FastEthernet4 80
> ip nat inside source static tcp 192.168.0.102 22 interface
> FastEthernet4 22
> ip nat inside source static tcp 192.168.0.102 21 interface
> FastEthernet4 21
> ip nat inside source static tcp 192.168.0.250 3074 interface
> FastEthernet4 3074
> ip nat inside source static udp 192.168.0.250 88 interface
> FastEthernet4 88
> ip nat inside source static udp 192.168.0.250 3074 interface
> FastEthernet4 3074
> !
> access-list 1 permit 10.0.0.0 0.255.255.255
> access-list 1 permit 172.16.0.0 0.15.255.255
> access-list 1 permit 192.168.0.0 0.0.255.255
>
> access-list 10 remark NAT-Inside-to-Outside
> access-list 10 deny 192.168.0.102
> access-list 10 deny 192.168.0.103
> access-list 10 deny 192.168.0.250
> access-list 10 permit 192.168.0.0 0.0.255.255
>
> This configuration has the following behaviour:
>
> For hosts 102, 103, 250 do NOT do any Port Address Translation.
>
> Allows arbitrary internet access from inside to outside
> with no restrictions - using NAT.
>
> Publishes the following to the internet
> utilising the Outside address of FastEthernet 4
> tcp 192.168.0.103 80
> tcp 192.168.0.102 22
> tcp 192.168.0.102 21 ! I am not certain, however I think that
> ! 21 will allow ftp since Cisco has an
> ! ftp Application layer Gateway which is
> enabled by default
> tcp 192.168.0.250 3074
>
>
> udp 192.168.0.250 88
> udp 192.168.0.250 3074
>
>
>
> I do not know anything about XBox however I am certain that
> hotmail is a straightforward web program that
> only needs port 80 outbound (maybe 443 too?)
> and makes NO inbound connections. Microsoft messenger
> is surely the same and required NO inbound connections.
>
> EXCEPT for hosts 102, 103, 250 Hotmail and MSN Messenger
> should be OK.

That's what I woudl have thought, however I cannot seem to get to
MSN/Hotmail from a host that isn't 102, 103, or 250. I wonder if that has
anything to do with the fact that in ACL 10 I am matching on hosts in the
Class B range of 192.168.0.0 and not the correct subnet mask of
255.255.255.0 that is defined in V2.

>
> The only other thing that I can think of is that your
> provider uses a lower MTU than Ethernet default of 1500.
>
> You could try
>
> int vl 2
> ip tcp mss-adjust 1300
>
>
> Clearly 1300 will be more than low enough
> but there is no point is worrying about a
> few bytes here and there in my opinion,
> choose one that we are certain will be low enough.
>

My current Netgear uses the default MTU size of 1500, but I can try that as
a last resort.

> By the way you do not have the firewall enabled.
> This may or may not be important to you since
> one seems to get decent protection from most things
> with NAT alone.
>
> Once you get what you need working come back for
> turning things off if reqired.
>
> Maybe you mean for ACL 10 this instead:-
> Note Extended ACL used instead of
> Standard one, ACL number range 100-199.
>
>
> access-list 110 remark Extended acl NAT-Inside-to-Outside
> access-list 110 deny tcp host 192.168.0.102 eq 21 any
> " " 22
> access-list 110 deny tcp host 192.168.0.103 eq 80 any
>
> etc...
>
> access-list 110 permit 192.168.0.0 0.0.255.255 any

Wow - I wonder if that has been my issue the entire time!

I think that might be why the router is inexplicably trouncing SOME of the
traffic on the Xbox. I would be able to connect to Xbox Live, but could
never establish a multiplayer session. Maybe I need to get port specific
instead of IP specific.

I guess what I need is to be able to have hosts 102, 103, and 250 use PAT
for any other TCP/UDP port other than what I am specifying in NAT, does that
make sense?

I'll make the ACL changes tonight and see what happens.


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