Cisco · Firewall · 2005

Cisco ASA 5505

Name: Cisco ASA 5505
Brand: Cisco
Availability: InStock

Cisco launched the ASA 5500 family in May 2005 as the successor to its PIX firewalls, and the 5505 was the small desktop member. It's a firewall with an eight-port 10/100 switch built in, two of those ports carry PoE, and there's a slot for a Security Services Card. Licensing is what separates one listing from the next. The Base license allows three VLANs in routed mode, one of them a restricted DMZ, with no trunks or failover. Security Plus raises that to 20 VLANs and eight trunks and adds active/standby failover. The user count of 10, 50 or unlimited is a separate license on either one, and Cisco ties every license to the serial number. It's a cheap way to practice the classic ASA command line on real hardware. Cisco stopped selling it in August 2017, ended support in August 2022 and pointed buyers to the 5506-X.

ASA5505-BUN-K9 (10-user Base bundle)ASA5505-50-BUN-K9 (50-user bundle)ASA5505-UL-BUN-K9 (unlimited-user bundle)ASA5505-SEC-BUN-K9 (unlimited-user Security Plus bundle)ASA 5506-X, the model that replaced it

Spec at a glance

Maker: Cisco
Type: Firewall
Launched: 2005
Part number: ASA5505-BUN-K9, ASA5505-SEC-BUN-K9, ASA5505-50-BUN-K9, ASA5505-UL-BUN-K9
End of sale: August 2017
End of support: August 2022
Ports: 8 × 10/100 switch ports, 2 with PoE
Routing: Stateful firewall, up to 150 Mbps; IPsec VPN
Software: Cisco ASA Software
Power: External AC supply, 20 W steady, 96 W peak
Memory: 512 MB RAM, 128 MB flash
Size: Desktop
Also listed as: ASA5505, ASA 5505, ASA5505-K9, Cisco 5505 firewall
Typical eBay ask (Oct 15, 2026): $25–$55

Lab check

License, support, noise and ports

License and feature set: Base gets 3 VLANs in routed mode (one is a restricted DMZ), no trunks, no failover and 10 IPsec VPN peers. Security Plus raises that to 20 VLANs, 8 trunks, 25 IPsec peers and active/standby failover. The user count (10, 50 or unlimited inside hosts) is a separate license on both. Cisco ties the activation key to the serial number, and its feature licenses can't move between devices.
Software and support: It runs Cisco ASA Software, and Cisco's ASA 9.2 configuration guide still covers it. Wikipedia says the final software for the 5505 came out in 2014. Cisco stopped selling it on August 25, 2017 and support ended on August 31, 2022.
Fans and power: It runs from an external AC supply. Cisco quotes 20 W steady state and 96 W peak, and 60 dBA as the maximum acoustic noise.
PoE: Two of the eight switch ports provide PoE, for a phone or access point. Cisco's datasheet doesn't give a per-port wattage.
Ports and optics: All eight ports are 10/100 copper, with no SFP. There's one expansion slot for a Security Services Card and three USB 2.0 ports.
Reset and console: It has one RJ-45 console port. Ask the seller to wipe the config, or plan on a console session to reset it.

Should come with it

External AC power supply
RJ-45 console cable
Rack-mount kit (optional)

Check the listing photos against this list, and ask the seller about anything you can’t see. A missing piece should come off the price.

What to check

Most trouble is the license, not the hardware. A Base unit with a 10-user limit is the common surprise, so check show version before you buy.

01License: Ask for a photo of show version. It should show the license and user count the listing claims.
02Security Plus: Look for Security Plus in that output if you want trunks or failover. Base stops at three VLANs.
03User count: Check the inside-hosts limit in show version. Unlimited or 50 is what you want for a busy lab.
04Serial: Match the serial in show version to the label in the photos. The license is tied to it and can't be moved.
05Power supply: Check the photos for the external power brick. Without it the unit won't run.
06PoE ports: Ask whether the PoE ports have powered a device. A phone or access point should light up on them.
07Console: Look for the RJ-45 console cable in the photos. On arrival, a console session should show the boot messages.
08Config: Ask the seller to wipe the config before shipping. A clean unit won't ask for the old enable password.

Buying your first used switch or router? How to check used network gear covers the console, a factory reset, power supplies and optics, and our noise and power guide covers what fans and power draw mean at home.

Buying guide

Which one to buy

§ Oct 15, 2026

We'd buy russ-t's ASA 5505 at $30 delivered, because the photo shows Cisco's external power adapter beside it and the unit won't run without one. There are at least 196 for sale, most asking $25 to $55 delivered, and several of the cheapest are unit only or titled no AC adapter, so check the photos for the brick. The license decides what you get, since Base stops at three VLANs with no trunks or failover while Security Plus allows 20 VLANs, 8 trunks and failover, and Cisco ties it to the serial, so ask for a show version photo before you trust waakif's SEC Plus title or platinumbusiness's unlimited users. Cisco ended support in August 2022 and the last software for it came out in 2014, so keep it on the lab bench for learning the ASA command line and off your internet connection.

Listed now: 196
For parts: 0
Typical ask: $25–$55
Full range: $10–$150

Cheapest
$16.00delivered
The lowest delivered ASA 5505 from a seller with feedback, but it's titled unit only, so you'll need Cisco's external power adapter before it runs. No license is named, so assume Base until show version says otherwise.
Cisco ASA 5505 V13 Fast Ethernet Firewall Security Appliance, Unit Only
View on eBay ↗: Cisco ASA 5505 V13 Fast Ethernet Firewall Security Appliance, Unit Only$16.00 delivered

Delivered prices include shipping as eBay quoted it to a US address on Oct 15, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.

Snapshot

For sale on eBay

8 of 196 listed

Checked Oct 15, 2026. Some may have sold.

Delivered prices include shipping as eBay quoted it to a US address on Oct 15, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.

Used
- Cheapest
Cisco ASA 5505 V13 Fast Ethernet Firewall Security Appliance, Unit Only
$16.00delivered
$16.00 · free shipping
Buy It Now$16.00
Offers accepted
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
V13, titled unit only, so no power adapter.
Seller: cosmonova11
100% positive
View on eBay ↗: Cisco ASA 5505 V13 Fast Ethernet Firewall Security Appliance, Unit Only
Used
Cisco ASA5505 V13 ASA 5505 Adaptive Security Appliance with Power Adapter
$24.99delivered
$24.99 · free shipping
Buy It Now$24.99
Our take
V13, titled with the power adapter. Free shipping.
Seller: bfierro1
100% positive
View on eBay ↗: Cisco ASA5505 V13 ASA 5505 Adaptive Security Appliance with Power Adapter
Used
Cisco ASA 5505 Adaptive Security Appliance with power cord
$29.99delivered
$29.99 · free shipping
Buy It Now$29.99
Offers accepted
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Titled with power cord, and the photo shows the adapter. Free shipping.
Seller: russ-t
100% positive
View on eBay ↗: Cisco ASA 5505 Adaptive Security Appliance with power cord
Used
Cisco ASA5505 47-18790-04 Firewall Security Appliance ASA 5505 (No Ac Adapter)
$37.95delivered
$37.95 · free shipping
Buy It Now$37.95
Offers accepted
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Titled no AC adapter. Free shipping.
Seller: itelements
99.9% positive
View on eBay ↗: Cisco ASA5505 47-18790-04 Firewall Security Appliance ASA 5505 (No Ac Adapter)
Used
Cisco ASA 5505 SEC Plus license and power adapter ASA5505-SEC-BUN-K9 ios 9.24
$64.08est. delivered
$50.04 + $14.04 shipping
Buy It Now$50.04
Our take
Titled ASA5505-SEC-BUN-K9 with Security Plus, the power adapter and 9.24 software. Ships from Canada.
Seller: waakif
99.5% positive
View on eBay ↗: Cisco ASA 5505 SEC Plus license and power adapter ASA5505-SEC-BUN-K9 ios 9.24
Used
- Check the seller
Cisco ASA 5505 VPN Firewall
$10.00delivered
$10.00 · free shipping
Buy It Now$10.00
Offers accepted
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Zero-feedback seller in the Czech Republic. Confirm the shipping cost before you offer.
Seller: nent_23
No feedback yet
View on eBay ↗: Cisco ASA 5505 VPN Firewall
Used
- Check the seller
CISCO ASA5505 SECURITY FIREWALL UNIMITED USERS 512MB DRAM FULLY TESTED ASA 5505
$59.98est. delivered
$49.99 + $9.99 shipping
Buy It Now$49.99
Offers accepted
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Titled fully tested with unlimited users, but the photo is Cisco's stock image. Ask for real photos and show version.
Seller: platinumbusiness
100% positive
View on eBay ↗: CISCO ASA5505 SECURITY FIREWALL UNIMITED USERS 512MB DRAM FULLY TESTED ASA 5505
Used
- Priced high
Cisco ASA5505-UC-BUN-K9 Security+ UC Phone Bundle 512Mb RAM
$150.00delivered
$150.00 · free shipping
Buy It Now$150.00
Offers accepted
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Priced high
Titled as the UC phone bundle with Security Plus, and the photo shows the adapter. About four times the typical ask.
Seller: skytech777
100% positive
View on eBay ↗: Cisco ASA5505-UC-BUN-K9 Security+ UC Phone Bundle 512Mb RAM

Prices change daily. The live eBay search shows everything listed now, including anything new since Oct 15, 2026.

See every listing on eBay ↗eBay search

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Brand

Type

Launched

Read

Cisco ASA 5505

Spec at a glance

Maker

Cisco

Type

Firewall

Launched

2005

Part number

ASA5505-BUN-K9, ASA5505-SEC-BUN-K9, ASA5505-50-BUN-K9, ASA5505-UL-BUN-K9

End of sale

August 2017

End of support

August 2022

Ports

8 × 10/100 switch ports, 2 with PoE

Routing

Stateful firewall, up to 150 Mbps; IPsec VPN

Software

Cisco ASA Software

Power

External AC supply, 20 W steady, 96 W peak

Memory

512 MB RAM, 128 MB flash

Size

Desktop

Also listed as

ASA5505, ASA 5505, ASA5505-K9, Cisco 5505 firewall

Typical eBay ask (Oct 15, 2026)

$25–$55

License, support, noise and ports

License and feature set

Base gets 3 VLANs in routed mode (one is a restricted DMZ), no trunks, no failover and 10 IPsec VPN peers. Security Plus raises that to 20 VLANs, 8 trunks, 25 IPsec peers and active/standby failover. The user count (10, 50 or unlimited inside hosts) is a separate license on both. Cisco ties the activation key to the serial number, and its feature licenses can't move between devices.

Software and support

It runs Cisco ASA Software, and Cisco's ASA 9.2 configuration guide still covers it. Wikipedia says the final software for the 5505 came out in 2014. Cisco stopped selling it on August 25, 2017 and support ended on August 31, 2022.

Fans and power

It runs from an external AC supply. Cisco quotes 20 W steady state and 96 W peak, and 60 dBA as the maximum acoustic noise.

PoE

Two of the eight switch ports provide PoE, for a phone or access point. Cisco's datasheet doesn't give a per-port wattage.

Ports and optics

All eight ports are 10/100 copper, with no SFP. There's one expansion slot for a Security Services Card and three USB 2.0 ports.

Reset and console

It has one RJ-45 console port. Ask the seller to wipe the config, or plan on a console session to reset it.

Should come with it

External AC power supply

RJ-45 console cable

Rack-mount kit (optional)

Check the listing photos against this list, and ask the seller about anything you can’t see. A missing piece should come off the price.

What to check

Most trouble is the license, not the hardware. A Base unit with a 10-user limit is the common surprise, so check show version before you buy.

01License: Ask for a photo of show version. It should show the license and user count the listing claims.

02Security Plus: Look for Security Plus in that output if you want trunks or failover. Base stops at three VLANs.

03User count: Check the inside-hosts limit in show version. Unlimited or 50 is what you want for a busy lab.

04Serial: Match the serial in show version to the label in the photos. The license is tied to it and can't be moved.

05Power supply: Check the photos for the external power brick. Without it the unit won't run.

06PoE ports: Ask whether the PoE ports have powered a device. A phone or access point should light up on them.

07Console: Look for the RJ-45 console cable in the photos. On arrival, a console session should show the boot messages.

08Config: Ask the seller to wipe the config before shipping. A clean unit won't ask for the old enable password.

Cisco ASA 5505

Spec at a glance

License, support, noise and ports

What to check

Which one to buy

For sale on eBay

Cisco ASA 5505 V13 Fast Ethernet Firewall Security Appliance, Unit Only

Cisco ASA5505 V13 ASA 5505 Adaptive Security Appliance with Power Adapter

Cisco ASA 5505 Adaptive Security Appliance with power cord

Cisco ASA5505 47-18790-04 Firewall Security Appliance ASA 5505 (No Ac Adapter)

Cisco ASA 5505 SEC Plus license and power adapter ASA5505-SEC-BUN-K9 ios 9.24

Cisco ASA 5505 VPN Firewall

CISCO ASA5505 SECURITY FIREWALL UNIMITED USERS 512MB DRAM FULLY TESTED ASA 5505

Cisco ASA5505-UC-BUN-K9 Security+ UC Phone Bundle 512Mb RAM

Compare with

Cisco ISR 2921

Juniper SRX210H-P-MGW

Juniper SRX300

Keep exploring

Cisco ASA 5505

Spec at a glance

License, support, noise and ports

What to check

Which one to buy

For sale on eBay

Cisco ASA 5505 V13 Fast Ethernet Firewall Security Appliance, Unit Only

Cisco ASA5505 V13 ASA 5505 Adaptive Security Appliance with Power Adapter

Cisco ASA 5505 Adaptive Security Appliance with power cord

Cisco ASA5505 47-18790-04 Firewall Security Appliance ASA 5505 (No Ac Adapter)

Cisco ASA 5505 SEC Plus license and power adapter ASA5505-SEC-BUN-K9 ios 9.24

Cisco ASA 5505 VPN Firewall

CISCO ASA5505 SECURITY FIREWALL UNIMITED USERS 512MB DRAM FULLY TESTED ASA 5505

Cisco ASA5505-UC-BUN-K9 Security+ UC Phone Bundle 512Mb RAM

Compare with

Cisco ISR 2921

Juniper SRX210H-P-MGW

Juniper SRX300

Keep exploring