Enterprise Networking Week 13

Spring 2023, Mondays 4:15-6:45 in Crown 105

April 24

Reno teeth

Ways to assess services

Assessing Email:

• Test reachability at port 25
• Test response from port 25
• Actually send an email
• Actually send an email from somewhere else

SNMP

• Some basic MIBs

SNMP tables

• get_bulk
• sparse tables
• some examples: mib2
• ASN.1 BER encoding
• SNMP set vs get; set: all or nothing; security implications
• SNMPv2 changes
• GetBulk
• Index columns
• TestAndIncr
• SNMPv2 MIB changes: sysORTable, IF-MIB
• ifXTable and ETHERLIKE mib
• BRIDGE mib and tracking users
• Etherlike-mib
• row creation
• RMON example
• PING-mib

Security

• SNMPv1 communities
• SNMPv3