Static NAT entry showing expiring in debug

[cybrsage]

I am having an issue with connectivity to a printer via NAT - people cannot print to it.  The debug shows my static NAT keeps expiring, I thought they never expired.  Here are the relevant parts of my config, it is a 2901 router running IOS 15.4(3)-M8

ip nat inside source static 10.10.10.122 1.1.1.10

ip route 164.156.185.0 255.255.255.0 SERIAL PORT WAN ADDRESS

There are no access lists, no filters, no route maps, no NAT pool, etc.  Pretty basic.  I did a debug ip nat det and this is what it shows

May 21 13:08:42.675: NAT: o: tcp (164.156.185.89, 55402) -> (1.1.1.10, 9100) [25228]
May 21 13:08:42.675: NAT: s=164.156.185.89, d=1.1.1.10->10.10.10.122 [25228]
May 21 13:08:42.727: NAT: API parameters passed: src_addr:164.156.185.73, src_port:0 dest_addr:1.1.1.10, dest_port:0, proto:6 if_input:Serial0/0/0.100 pak:219A6A2C get_translated:1
May 21 13:08:42.727: ipnat_api_translated_address_and_port_common, out->in want IL,OL
May 21 13:08:42.727: NAT: API Translated-Info(1): (src-addr:164.156.185.73, src-port:0) (dest-addr:10.10.10.122, dest-port:0)
May 21 13:08:42.727: NAT: o: tcp (164.156.185.73, 63301) -> (1.1.1.10, 9100) [19601]
May 21 13:08:42.727: NAT: s=164.156.185.73, d=1.1.1.10->10.10.10.122 [19601]
May 21 13:08:44.679: NAT: o: tcp (164.156.185.79, 61100) -> (1.1.1.10, 9100) [15496]
May 21 13:08:44.679: NAT: s=164.156.185.79, d=1.1.1.10->10.10.10.122 [15496]
May 21 13:08:45.423: NAT: o: tcp (164.156.185.90, 64796) -> (1.1.1.10, 9100) [5472]
May 21 13:08:45.423: NAT: s=164.156.185.90, d=1.1.1.10->10.10.10.122 [5472]
May 21 13:08:45.739: NAT: o: tcp (164.156.185.73, 63301) -> (1.1.1.10, 9100) [19602]
May 21 13:08:45.743: NAT: s=164.156.185.73, d=1.1.1.10->10.10.10.122 [19602]
May 21 13:08:45.779: NAT: expiring 1.1.1.10 (10.10.10.122) tcp 9100 (9100)
May 21 13:08:46.287: NAT: API parameters passed: src_addr:164.156.185.93, src_port:0 dest_addr:1.1.1.10, dest_port:0, proto:6 if_input:Serial0/0/0.100 pak:3D807AF8 get_translated:1
May 21 13:08:46.287: ipnat_api_translated_address_and_port_common, out->in want IL,OL
May 21 13:08:46.287: NAT: API Translated-Info(1): (src-addr:164.156.185.93, src-port:0) (dest-addr:10.10.10.122, dest-port:0)
May 21 13:08:46.287: NAT: o: tcp (164.156.185.93, 49763) -> (1.1.1.10, 9100) [19957]
May 21 13:08:46.287: NAT: s=164.156.185.93, d=1.1.1.10->10.10.10.122 [19957]
May 21 13:08:46.575: NAT: API parameters passed: src_addr:164.156.185.97, src_port:0 dest_addr:1.1.1.10, dest_port:0, proto:6 if_input:Serial0/0/0.100 pak:4117B654 get_translated:1
May 21 13:08:46.575: ipnat_api_translated_address_and_port_common, out->in want IL,OL
May 21 13:08:46.575: NAT: API Translated-Info(1): (src-addr:164.156.185.97, src-port:0) (dest-addr:10.10.10.122, dest-port:0)
May 21 13:08:46.575: NAT: o: tcp (164.156.185.97, 56945) -> (1.1.1.10, 9100) [32195]
May 21 13:08:46.575: NAT: s=164.156.185.97, d=1.1.1.10->10.10.10.122 [32195]
May 21 13:08:48.852: NAT: expiring 1.1.1.10 (10.10.10.122) tcp 9100 (9100)
May 21 13:08:49.304: NAT: o: tcp (164.156.185.93, 49763) -> (1.1.1.10, 9100) [19958]
May 21 13:08:49.304: NAT: s=164.156.185.93, d=1.1.1.10->10.10.10.122 [19958]
May 21 13:08:49.588: NAT: o: tcp (164.156.185.97, 56945) -> (1.1.1.10, 9100) [32196]
May 21 13:08:49.588: NAT: s=164.156.185.97, d=1.1.1.10->10.10.10.122 [32196]
May 21 13:08:49.808: NAT: API parameters passed: src_addr:164.156.185.103, src_port:0 dest_addr:1.1.1.10, dest_port:0, proto:6 if_input:Serial0/0/0.100 pak:219A6540 get_translated:1
May 21 13:08:49.812: ipnat_api_translated_address_and_port_common, out->in want IL,OL
May 21 13:08:49.812: NAT: API Translated-Info(1): (src-addr:164.156.185.103, src-port:0) (dest-addr:10.10.10.122, dest-port:0)
May 21 13:08:49.812: NAT: o: tcp (164.156.185.103, 53837) -> (1.1.1.10, 9100) [30085]
May 21 13:08:49.812: NAT: s=164.156.185.103, d=1.1.1.10->10.10.10.122 [30085]
May 21 13:08:50.044: NAT: API parameters passed: src_addr:164.156.185.92, src_port:0 dest_addr:1.1.1.10, dest_port:0, proto:6 if_input:Serial0/0/0.100 pak:3E04F2DC get_translated:1
May 21 13:08:50.044: ipnat_api_translated_address_and_port_common, out->in want IL,OL

clear ip nat stat
show ip nat stat
Total active translations: 35 (6 static, 29 dynamic; 29 extended)
Peak translations: 39, occurred 00:00:07 ago
Outside interfaces:
Serial0/0/0.100
Inside interfaces:
GigabitEthernet0/0
Hits: 15 Misses: 0
CEF Translated packets: 0, CEF Punted packets: 0
Expired translations: 7
Dynamic mappings:
Total doors: 0
Appl doors: 0
Normal doors: 0
Queued Packets: 0

wait 1/2 second

show ip nat stat
Total active translations: 33 (6 static, 27 dynamic; 27 extended)
Peak translations: 39, occurred 00:00:14 ago
Outside interfaces:
Serial0/0/0.100
Inside interfaces:
GigabitEthernet0/0
Hits: 21 Misses: 0
CEF Translated packets: 0, CEF Punted packets: 0
Expired translations: 11
Dynamic mappings:
Total doors: 0
Appl doors: 0
Normal doors: 0
Queued Packets: 0

Any insight as to what is going on?

[paul driver]

Hello

What are you trying to acheive, Is it to print from external hosts to an internal printer  on 10.10.10.122?

[cybrsage]

Yes, external user prints to internal printer.  That way someone in another city can print off something to be physically picked up by a person where the printer resides.

[paul driver]

Hello

If this is the primary rtr for internet /wan access, Do you have a default static route or any dynamic routing in place for internet/wan access.

Can you explain this static route- ip route 164.156.185.0 255.255.255.0 SERIAL PORT WAN ADDRESS

If possible please attach the running config of this rtr  (preferably in a txt file)

[cybrsage]

Yes, it is the only path out of the network and into the wider world beyond.

I used words instead of my real WAN address to not share with the world what the real WAN address is, for security reasons.  I was showing there is a static route for that network, sending it out to the WAN.  The WAN interface is also the NAT Outside interface and the LAN interface is the NAT Inside interface.