open snmp port when using ipchains

[cajunrob]

I am running ipchains on Redhat 7.2. I can't access snmp whenever I bring up ipchains.

I am using this line:
-A input -s 0/0 -d 0/0 161 -p tcp -y -j ACCEPT

But I still can't access it. What other ports do I need to open and how?

 

[newmangj]

You specify TCP, snmp traffic uses UDP by default. You may also want to open port 162 for snmp trap handling.

 

[cajunrob]

How do I open UDP?

I've tried "-A input -s 0/0 -d 0/0 161 -p udp -y -j ACCEPT" but ipchains won't accept that.

What is the syntax for UDP?

 

[newmangj]

Have you tried -p all ?

 

[cajunrob]

I finally figured it out. I am using the following:

-A input -s 0/0 -d 0/0 161 -p udp -j ACCEPT
-A input -s 0/0 -d 0/0 162 -p udp -j ACCEPT