The operating system used on the majority of Cisco's routers and switches; a package of routing, switching, internetworking and telecommunications functions tightly integrated with a multitasking operating system. For Apple's mobile device OS, use apple-ios.

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How to fix stalled connection on large download

I have a cisco 1921 router performing routing and NAT function. Cisco 3750 is performing layer 3 core switching duties. Users are complaining about large file transfers being stalled (not dropped) ...
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627 views

Unable to communicate with web proxy server on iOS

I am following the instructions on how to use a HTTP proxy with an iPhone, however I appear unable to communicate with the HTTP proxy. I have configured the settings in my phone correctly to use the ...
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1answer
266 views

Putty: disable configuration of server terminal length

I would like to prevent Putty from setting the server terminal length so as to avoid the dreaded --More-- prompt in Cisco IOS. Please do not tell me to set length 0 in line config mode because this ...
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1answer
4k views

Port Forwarding on Cisco Router

I'm a Cisco newbie, have the 1841, with two ethernet interfaces: interface FastEthernet0/0: Internal Desired destination IP: 186.67.181.140 interface FastEthernet0/1: External World IP ...
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1answer
115 views

Cisco IOS Show | Filter | redirect

I am new to Cisco IOS and I have one question that I have come across. Please reference this thread. Reference The answer to that thread states that in Cisco IOS you can run a command, filter it down ...
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1answer
771 views

Cisco 887VA Port Forwarding Not Working

I have a Cisco 887VA connected to our BT Business Broadband line. We also have another modem on a seperate connection which also handles our DHCP. The Cisco is plugged into our network switch, as is ...
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1answer
726 views

iPhone can't authenticate at dovecot

I've set up a mail server running with postfix and dovecot. Mainly configured as described here. Also I created a signed certificate from Startssl.com. IMAP is running on port 993. From my computer ...
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0answers
231 views

Cisco 861 - Unable to traceroute

I'm having an issue with my Cisco 861. I'm unable to traceroute to any ip address from the router, even the next hop. Can anyone suggest possible causes. Apologies for the censoring but I won't take ...
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1answer
242 views

MDM Server Apple Certificate: Certificate Signature Verification failed

I want to create a MDM server to manage my iOS devices. I have enrolled in iOS Enterprise Developer program. And executed the following openSSL commands "1. Creating Certificate Authority (CA)" ...
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0answers
219 views

Site-to-Site VPN not connecting with Cisco 877

I can't seem to get the VPN connection going with my 877. I have an old IOS (12.4) but it looks to me like all the pieces are there. I have compared this config against the Azure-provided (albeit ...
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0answers
378 views

Cisco 1841 - Acting as a PPPoE terminator?

We have 2x Fortigate 200B firewalls that we wish to operate in Active/Active HA mode - though, obviously, they cannot do this with PPPoE/DHCP enabled on the externally facing interfaces. To overcome ...
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164 views

Cisco 1602: rewriting startup-config from terminal

How do I rewrite startup-config on a Cisco 1602 router without affecting the running-config? Outgoing connections from the router (scp, http) are not allowed. I'm not connected to the serial port, ...
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956 views

Strongswan ipsec <--> iPhone, can't access LAN

I'm trying to connect to my LAN with iPhone, using Cisco IPsec VPN connection. I can connect to VPN, but I can't access any LAN devices. Hardware/Software: Strongswan 5.0.4, running on router - ...
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1answer
186 views

Route maps on dual homed Cisco router

I have a Cisco 1801 on a remote site with dual WAN connections, with route maps to correctly NAT depending on which interface the traffic leaves via. I use IP SLA to adjust the default route from the ...
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1answer
342 views

Is it possible to configure a Cisco router to serve as a Teredo relay?

The router in question is a Cisco 871, show version as follows: Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 12.4(24)T8, RELEASE SOFTWARE (fc1) Technical Support: ...
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1answer
1k views

Cisco IOS Router and Azure VPN - tunnel established, but traffic is not flowing

I am trying to connect a Cisco IOS router to Azure via the IPSec VPN. I have used the Cisco ISR template to establish a tunnel from my router to Azure. In the Azure control panel, I can see that the ...
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2answers
69 views

Cisco Archiving of Logs - Rebooting device resets file count but doesn't remove files

We are using the cisco IOS feature of configuration archiving and it has been very useful. One thing we are finding is that we have set the maximum file count to 14, which is fine. Except when we ...
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1answer
1k views

IOS Port Forwarding and NAT involving a VPN

We have a Cisco 1921 router running IOS 15.1 at one of our branches which is connected via a L2L IPsec VPN to a ASA5510 running ASA 8.2 at our headquarters. The network looks something like this: ...
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3answers
370 views

IOS Nated port forwarding

I have cisco ios router with ios C1900 Software (C1900-UNIVERSALK9-M), Version 15.2(4)M1. And I have setup Nat with port overload (one public IP). And there is a static mapping: ip nat source static ...
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1answer
2k views

Cisco - Port's configured trust state is now operational

I am looking at a Cisco switch's log at work and am a bit confused by how verbose it can be at times. For instance, we use automatic QoS here and I often see this when phones are plugged: Mar 18 ...
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1answer
233 views

EasyVPN vs Site to Site VPN bandwidth use

We have recently switched from site-to-site VPNs to EasyVPNs. At around the same time, we noticed increased bandwidth use. Does anyone know whether these two VPN methods use noticeably different ...
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1answer
63 views

dot3StatsDuplexStatus not firing from Cisco Switch

Anyone have any luck with this Trap dot3StatsDuplexStatus OID = 1.3.6.1.2.1.10.7.2.1.19 I am able to test the OID by doing an SNMP walk which shows the correct information, however no Traps are ever ...
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1answer
809 views

Cisco AP, how to show dot11 wpa handshake timeout?

Please help me with a newbie question regarding Cisco AP CLI . According to this Cisco doc , I know how to change WPA handshake timeout value to 2000 milliseconds. Cisco1242AG-1(config)#dot11 wpa ...
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1answer
2k views

Cisco 881w AP factory reset

If I want to return to the factory IOS and configurations of the AP only, I must issue this command: service-module wlan-ap0 reset default-config right? But which IOS is going to replace the ...
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1answer
133 views

Cisco 12.4 ACL with DHCP-obtained address

I figured this would be an easy one, but I've had a good amount of trouble finding this answer myself. I have a Cisco router that I'm setting up to have my Internet connection on one interface ...
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1answer
224 views

Cisco 871 IOS BVI: Distinguishing incoming and outgoing

I understand that a BVI is very much equivalent to a network switch. But it includes the benefit of being able to have an access control list. I am doing this, but I would like to more effectively ...
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1answer
1k views

Cisco NAT - Sharing single public IP with multiple services

We have this setup on a SonicWall firewall, but I can't for the life of me figure out how to do it on a new Cisco 5520. Here is what I want to do External_IP1:25 --> InternalMailGW_IP:25 ...
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votes
1answer
460 views

Forwarding a port internally - Cisco-881

I have a Cisco 881 on which I forward traffic coming from outside to an internal IP, but if an internal IP accesses the external IP, it gets the Cisco HTTP Server (or a broken connection if i set no ...
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1answer
165 views

More than 8 classes in a policy-map - Cisco 3560

It appears I am limited to 8 classes per policy-map. Here is the error message when using the Cisco Network Assistant: The policy "policy-name" contains more than 8 policers, which means it ...
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votes
1answer
675 views

Cisco 2911 - problem with DHCP

i am configuring DHCP daemon on Cisco 2911. At some point i assigned address 192.168.50.50 to one box (using MAC address 'relation'). When I wanted to saved config - I got warning, that address ...
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votes
1answer
108 views

Restrict NAT in IOS to only one public IP

I've managed to enable port-forwarding on my Cisco 877 but I wasn't able to find a way to specify a single accepted IP from the outside. Any link to a Cisco documentation or commands to type in IOS ...
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1answer
3k views

Cisco SNMP OID for track/SLA monitor

I have Cisco 3600 router, and a few SLA monitors configured. Based on these monitors, I make a decision where to route users (basically a failover). It works very smooth and nice, to the point where ...
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2answers
119 views

Cisco command wont work on syxtax checker

I'm trying to validate the building of a tool for managing Cisco ACL commands. Thing is i'm using the aclcheck sintax validator (i dont own cisco equipament) with the following command do check ...
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votes
1answer
46 views

Cisco Router configuration prompt not working

First of all I am new to Cisco, We are moving from an old T1 to Fiber Optic and I need to configure our Cisco 1841 router to the new IP, DNS, etc. I watch some videos and I get the overall concept ...
-1
votes
1answer
161 views

iPad<->Device Ad-Hoc network failures using Auto IP addresses [closed]

We are using the iPad to make an ad-hoc wireless connection to our proprietary device. DHCP is not available, so we are using addresses in the Auto-IP range. The user selects the device from the list ...
-1
votes
1answer
302 views

Can 'show mac address-table' be used inside user mode? [closed]

I've been studying for my CCNA exams using Cisco ICND1 Official Cert Guide, Wendell Odom. On one question they ask in which modes show mac address-table can be executed. The answer is User mode and ...
-1
votes
1answer
503 views

Plesk cron iOS notifications randomly stopped working [closed]

Recently, I started getting these cron error from Plesk. This cron controls push notifications to Plesk Manager on my iPhone/iPad. Obviously, turning off the cron stops the error but I want the cron ...
-1
votes
1answer
101 views

Using PVLANs with normal VLANs in a trunked environment

Assume a trunked environment with two switches, S1 and S2. The swtiches are connected with a trunk port designed to pass VLAN 26. What would happen if VLAN 26 on S2 is configured as a private-vlan ...
-1
votes
1answer
217 views

Is it possible to log Active Directory users internet activity on a Cisco Firewall-IOS router?

We are looking at replacing our Forefront TMG server with a combination Cisco ISE VMware instance and hopefully an Active Directory integration with our edge router. We need to log all authenticated ...
-4
votes
2answers
89 views

Cisco 2801 - ACL example to prevent certain users in same subnet from accessing certain devices [closed]

May be a simple answer, but does anyone have an example of an ACL that would prevent certain users (preferably based on MAC address, so that I can not have to deal with static DHCP addressing) from ...