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Questions tagged [cisco]

Cisco is a provider of switches and routers to commercial consumers. Cisco devices run IOS or NX-OS operating systems. This is a generic tag to be used when no more specific tags are available. See the partial list of tags in the full Tag Wiki.

Cisco is a provider of switches and routers to many medium and large companies. Cisco devices often run IOS or NX-OS operating systems.

Since Cisco acquisition of Linksys, the consumer line of switches, firewalls and routers (which do NOT run IOS) have been rebranded under the Cisco name.

This tag is a generic tag - Wherever possible a more specific tag related to the product you are using should be used instead. For example:

, , , , ,

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Cisco pix - external interface goes down - is this the pix or network?

In December our Cisco PIX 501 appeared to hang taking the webservers behind it offline. It did this 4 times in the space of a couple of weeks and the "remote hands" engineer at the data-centre (where everything is colocated) reported: simply…
Dan
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Why should I use Firewall Zones and not just Address Objects?

I appreciate Firewall Address Objects and Address Groups - they simplify management by letting me give a name to a group of addresses. But I don't understand what Firewall Zones (LAN, WAN, DMZ, etc.) do for me over Address Groups. I know all…
SRobertJames
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Shrinking TCP Window Size to 0

Having an issue with any large file transfer that crosses our Cisco ASA unit come to an eventual pause. Setup Test1: Server A, FileZilla Client <- 1GBPS -> Cisco ASA <- 1 GBPS -> Server B, FileZilla Server TCP Window size on large transfers will…
Brent
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Cisco 1760 T1 Setup

My 1760 has a WIC1-T1 card in Slot 0 and the slot 0 "OK" light is lit. When the router boots it shows that it sees the T1 card. I would like to configure my T1. I received the following details from my ISP: * Removed IP's IP Version: IPv4 Router…
Joseph
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Adding a host to Cisco IPS Never Block List

We are running a Cisco ASA 5510 with the IPS module. We have an internal server that is preforming a lot of SNMP discovery scans and is being blocked and shutdown by the IPS. Since I'm in control of this server, and this is an expected behaviour I…
Richard West
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Enterprise Networking Monitoring Tool

Possible Duplicate: What tool do you use to monitor your servers? Hello, I'm looking for an ENTERPRISE Networking monitoring tool, CACTI is great but we want more. I'm looking for some features like: - Cisco monitoring (SNMP) - Cisco Netflow -…
Andre
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Step by step guide for asa 5505

Is there any step by step guide for configuring an ASA 5505 out there? Most of the info that i keep running into are repost of the same article. The most useful guide i found so far was this one.…
alxxer
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Cisco IOS BVI ACL: Only allow established UDP

Related: Cisco IOS ACL: Don't permit incoming connections just because they are from port 80 I know we can use the established keyword for TCP.. but what can we do for UDP (short of replacing a Bridge or BVI with a NAT)? Answer I found out what…
700 Software
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Cisco ASA - NAT'ing VPN traffic

I have an IPsec VPN setup like this: [Remote users]-[Remote ASA] <-VPN-> [My ASA]-[Subnet A]-[Router 2]-[Subnet B] The VPN is set to handle traffic between [remote users] and [Subnet A]; it does not include [Subnet B]. Pretend the firewall rules…
DrStalker
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Cisco Can a NAT router co-exist with a BVI?

I would like to make sure I understand this correctly. Given a Cisco ISO router that is set up with a BVI (a variation of a bridge route).. and the following layout "ISP router" \ "Network switch" # nothing special here. | …
700 Software
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FreeBSD 8.1 unstable network connection

I have three FreeBSD 8.1 running on three different hardware and therefore consist of different network adapter as well (bce, bge and igb). I found that the network connection is kind of unstable which I have tried to scp some > 10MB file and found…
frankcheong
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SSTP BPDU with bad TLV and macflap -- info please

I'm slowly locking down the network I've inherited and mac-flapping has been a problem in the past with customers doing all kinds of crazy things. Thats changing but I am now encountering this error: Dec 30 18:31:31 10.50.1.50 1565: 001567: Dec 30…
Adeodatus
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Cisco IOS ACL types

The built in command help list displays access list types based on which range. router1(config)#access-list ? <1-99> IP standard access list <100-199> IP extended access list <1100-1199> Extended 48-bit MAC address…
700 Software
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Vlans and subinterfaces

I've inherited a moderate size network that I'm trying to bring some sanity to. Basically, its 8 public class Cs and a slew of private ranges all on one vlan (vlan1, of course). Most of the network is located throughout dark sites. I need to start…
Adeodatus
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Is it possible to upgrade a Cisco ASA 5510 A/S Pair from 7.0(6) to 8.2.4 without downtime?

We currently have a pair of Cisco ASA 5510 firewalls in an active/standby failover configuration. They are currently running 7.0(6) and we'd like to upgrade them to 8.2.4. Is it possible to failover to one of them while we upgrade the other and…
Derek Ivey
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