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Azure Load Balancer Health Prob 22 Creating Log "Did not receive identification string
Back end ec2 instance is accessible through ssh and browser but fails load balancer health checkConfiguring Azure Internal Load BalancerEC2 Failing Load Balancer Health CheckIs it possible to use both an ILB and an ELB (listening on the same port) in the same Azure cloud service?Azure Internal Load Balancer Ignoring 2nd VMWhen does Azure Load-Balancer Health Probe return to normal state?Azure Load Balancing HTTP probe not workingSSL certificate and Azure classic load balancerAzure load-balancer slow to react to 503AWS Elastic Load Balancer and target group health check fail for no apparent reason
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We have Azure Load Balancer which needs to be redirect traffic any of the Healthy IPTABLE Servers (Total 2 IPTABLE Servers). From IPTABLE server traffic will be forwarded to Other Production Servers (Which are not accessible Directly).
We have configured port 22 as health probe on Azure Load Balancer. Because of this we are getting logs created like following on Production Servers.
2019-04-27T05:52:29.443677-05:00 azneqodrt001 sshd[35446]: Did not receive identification string from 10.16.10.12
Alternatively, We have created custom port 5500 using nc command. Again we have reconfigured Load Balancer health probe with port 5500 (on IPTABLE Servers) instead of 22. But it was worked only for few minutes. Later it stopped working.
Can anyone suggest any alternative for this kind of situation.
linux azure load-balancing
edited May 2 at 21:43
kubanczyk
10.7k42946
asked May 2 at 17:50
Ram TooRam Too
61
add a comment |
We have Azure Load Balancer which needs to be redirect traffic any of the Healthy IPTABLE Servers (Total 2 IPTABLE Servers). From IPTABLE server traffic will be forwarded to Other Production Servers (Which are not accessible Directly).
We have configured port 22 as health probe on Azure Load Balancer. Because of this we are getting logs created like following on Production Servers.
2019-04-27T05:52:29.443677-05:00 azneqodrt001 sshd[35446]: Did not receive identification string from 10.16.10.12
Alternatively, We have created custom port 5500 using nc command. Again we have reconfigured Load Balancer health probe with port 5500 (on IPTABLE Servers) instead of 22. But it was worked only for few minutes. Later it stopped working.
Can anyone suggest any alternative for this kind of situation.
linux azure load-balancing
edited May 2 at 21:43
kubanczyk
10.7k42946
asked May 2 at 17:50
Ram TooRam Too
61
add a comment |
We have Azure Load Balancer which needs to be redirect traffic any of the Healthy IPTABLE Servers (Total 2 IPTABLE Servers). From IPTABLE server traffic will be forwarded to Other Production Servers (Which are not accessible Directly).
We have configured port 22 as health probe on Azure Load Balancer. Because of this we are getting logs created like following on Production Servers.
2019-04-27T05:52:29.443677-05:00 azneqodrt001 sshd[35446]: Did not receive identification string from 10.16.10.12
Alternatively, We have created custom port 5500 using nc command. Again we have reconfigured Load Balancer health probe with port 5500 (on IPTABLE Servers) instead of 22. But it was worked only for few minutes. Later it stopped working.
Can anyone suggest any alternative for this kind of situation.
linux azure load-balancing
edited May 2 at 21:43
kubanczyk
10.7k42946
asked May 2 at 17:50
Ram TooRam Too
61
We have Azure Load Balancer which needs to be redirect traffic any of the Healthy IPTABLE Servers (Total 2 IPTABLE Servers). From IPTABLE server traffic will be forwarded to Other Production Servers (Which are not accessible Directly).
We have configured port 22 as health probe on Azure Load Balancer. Because of this we are getting logs created like following on Production Servers.
2019-04-27T05:52:29.443677-05:00 azneqodrt001 sshd[35446]: Did not receive identification string from 10.16.10.12
Alternatively, We have created custom port 5500 using nc command. Again we have reconfigured Load Balancer health probe with port 5500 (on IPTABLE Servers) instead of 22. But it was worked only for few minutes. Later it stopped working.
Can anyone suggest any alternative for this kind of situation.
linux azure load-balancing
linux azure load-balancing
edited May 2 at 21:43
kubanczyk
10.7k42946
asked May 2 at 17:50
Ram TooRam Too
61
edited May 2 at 21:43
kubanczyk
10.7k42946
asked May 2 at 17:50
Ram TooRam Too
61
edited May 2 at 21:43
kubanczyk
10.7k42946
edited May 2 at 21:43
kubanczyk
10.7k42946
edited May 2 at 21:43
kubanczyk
10.7k42946
10.7k42946
asked May 2 at 17:50
Ram TooRam Too
61
asked May 2 at 17:50
Ram TooRam Too
61
asked May 2 at 17:50
Ram TooRam Too
61
61
add a comment |
add a comment |
1 Answer
1
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votes
Two alternatives:
whatever useful are "IPTABLE" servers serving besides port 22, try to healthcheck that useful service; for example if they are translating (doing NAT) a port like 80 to some other port, then check port 80; it's not so good to check 22 if the customer needs 80
if you need to have that fake healthcheck port, use
nc -k -l 5500; the-kwill make it stay for more than one connection; best would be to set up a systemd unit, so it could autostart it as well as restart on failure
answered May 2 at 21:49
kubanczykkubanczyk
10.7k42946
Yes we have created fake port on IPTABLE Servers. But still not working as IPTABLE server forwarding same load balancer scanning traffic to target system also.
– Ram Too
May 3 at 5:21
add a comment |
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1 Answer
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1 Answer
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votes
Two alternatives:
whatever useful are "IPTABLE" servers serving besides port 22, try to healthcheck that useful service; for example if they are translating (doing NAT) a port like 80 to some other port, then check port 80; it's not so good to check 22 if the customer needs 80
if you need to have that fake healthcheck port, use
nc -k -l 5500; the-kwill make it stay for more than one connection; best would be to set up a systemd unit, so it could autostart it as well as restart on failure
answered May 2 at 21:49
kubanczykkubanczyk
10.7k42946
Yes we have created fake port on IPTABLE Servers. But still not working as IPTABLE server forwarding same load balancer scanning traffic to target system also.
– Ram Too
May 3 at 5:21
add a comment |
Two alternatives:
whatever useful are "IPTABLE" servers serving besides port 22, try to healthcheck that useful service; for example if they are translating (doing NAT) a port like 80 to some other port, then check port 80; it's not so good to check 22 if the customer needs 80
if you need to have that fake healthcheck port, use
nc -k -l 5500; the-kwill make it stay for more than one connection; best would be to set up a systemd unit, so it could autostart it as well as restart on failure
answered May 2 at 21:49
kubanczykkubanczyk
10.7k42946
Yes we have created fake port on IPTABLE Servers. But still not working as IPTABLE server forwarding same load balancer scanning traffic to target system also.
– Ram Too
May 3 at 5:21
add a comment |
Two alternatives:
whatever useful are "IPTABLE" servers serving besides port 22, try to healthcheck that useful service; for example if they are translating (doing NAT) a port like 80 to some other port, then check port 80; it's not so good to check 22 if the customer needs 80
if you need to have that fake healthcheck port, use
nc -k -l 5500; the-kwill make it stay for more than one connection; best would be to set up a systemd unit, so it could autostart it as well as restart on failure
answered May 2 at 21:49
kubanczykkubanczyk
10.7k42946
Two alternatives:
whatever useful are "IPTABLE" servers serving besides port 22, try to healthcheck that useful service; for example if they are translating (doing NAT) a port like 80 to some other port, then check port 80; it's not so good to check 22 if the customer needs 80
if you need to have that fake healthcheck port, use
nc -k -l 5500; the-kwill make it stay for more than one connection; best would be to set up a systemd unit, so it could autostart it as well as restart on failure
answered May 2 at 21:49
kubanczykkubanczyk
10.7k42946
answered May 2 at 21:49
kubanczykkubanczyk
10.7k42946
answered May 2 at 21:49
kubanczykkubanczyk
10.7k42946
answered May 2 at 21:49
kubanczykkubanczyk
10.7k42946
10.7k42946
Yes we have created fake port on IPTABLE Servers. But still not working as IPTABLE server forwarding same load balancer scanning traffic to target system also.
– Ram Too
May 3 at 5:21
add a comment |
Yes we have created fake port on IPTABLE Servers. But still not working as IPTABLE server forwarding same load balancer scanning traffic to target system also.
– Ram Too
May 3 at 5:21
Yes we have created fake port on IPTABLE Servers. But still not working as IPTABLE server forwarding same load balancer scanning traffic to target system also.
– Ram Too
May 3 at 5:21
Yes we have created fake port on IPTABLE Servers. But still not working as IPTABLE server forwarding same load balancer scanning traffic to target system also.
– Ram Too
May 3 at 5:21
add a comment |
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